It Works!! // The $127 Shimano GRX Mullet Upgrade

[@michiganstate149]

This worked super well for me. GRX 11s shifters. Garbaruk 10-50 11s XD. Eagle XX1 12s chain. Shimano GRX 822 SGS 12s derailleur. Absolute Black 42t chainring. Shifts super well. Better than my Eagle MTB Garbaruk setups. Love this combination on my gravel bike. Caveat: check your B limit. I found that matching the line on the derailleur (meant for a 51t) to the 50t Garbaruk was spot on. The other thing. Use the Shimano recommended chain length (4-5 links+ quick link on big to big). I cut mine too short (2 links, vs the 4) and it skipped on the 10t cog while riding. With the right length it shifts better and no skipping.

[@jonruble7217]

I wanted to try this, but multiple mechanics told me it wouldn't work. In my mind, it made total sense, but they kept telling me that the grx 822 sgs pull ratio wouldn't allow it. Thanks for confirming my hackster suspicion.

[@bljordan1055]

Bike shops will tell you any changes to a drive train is incompatible because they want more money. I'm running my old XTR 8 speed rear derailleur on a 10 speed bike. I'm also running 8 speed chainring and crank on a 1x11 bike.

[@TheBikeSauce]

More likely that shop mechanics don’t have extra hours to burn tinkering with something that may or may not work.

[@davidcummings5826]

Or they don’t want to get blamed for putting two different systems together if something goes wrong (even if it’s not a compatibility issue). They’ll sell you whatever you want, they probably just won’t put it together for you unless it’s in the same system.

[@робертПетров-с8д]

​@@TheBikeSauce7-8 скоростей лучше. А дуракам и 14 мало Поколение дураков почему вы 🤡🤡🤡🤡🤡🤡🤡🤡🤡🤡💩💩💩💩💩

[@Ghostina1]

Otherwise there is always Garbaruk with its large cage upgrades for any derailleur

[@mustardlightning13]

Actually, on a lot of frames this can be done with an 11 speed GRX812 and a 5100 series MTB cassette. And with a WolfTooth Roadlink with virtually any frame. Tried and tested. Cost me a total of 60€.

[@kornelius1306]

I am also among those who were lucky to get it to work properly fairly easily. I was hesitant at first, but really wanted to get rid of WolfTooth Tanpan with deore derailleur combination. So I went ahead and ordered the GRX one. Been riding it for over 3 months now. And It just works. Without any hiccups

[@TG-lp5yd]

It works for me! Grx 600 duals, rd 822, 11-46 slx and hg-701 chain

[@inkognitobi7995]

Cool Idea, thanks for the informative Video and testing. However, the cheapest all-Shimano option wasn't even mentioned so far. You can swap the cage on a 11-Speed RX812 for the SGS-Version of the 11-Speed Deore XT one (M8000 Series). Inner and outer Cage plate should be about 15-20$ retail. Works great on a 11-51 Deore Cassette for me. I was originally looking into the Gabaruk cages, but this seems to be the cleaner and cheaper solution.

[@TheBikeSauce]

Thanks for this. I've heard about it, but never tried. Requires a bit more technical know-how, but seems like a cool option.

[@arjanschild3552]

@@TheBikeSauce wow,...good point: Capacity of 47 ! compared to 41

[@LukeRichardson1981]

Interesting. I'm running a 46t cassette with a stock RX812 derailleur and it works mostly OK (Shimano states maximum capacity of 42t), but the B-limit screw has to be set really far in and the shifting isn't as precise as my R8000 Ultegra was (even though GRX 800 should be just as smooth and sharp as mechanical Ultegra). I might look into this solution to improve my shifting.

[@黄辰旭]

@@LukeRichardson1981 Rx812 is the rebranded m8000. MTB RD is the testing bed of road RD, shimano just rebranded the MTB RD to the 12s road and grx RD.

[@黄辰旭]

That's the point, the 12s RX822 is over 120 USD, the old one, rx812 is 60 USD plus 20 USD cages, still 30% cheaper on 12s combination. Really money saving trick.

[@Fango925]

My only issue with GRX 11speed was the low cassette capacity - this solves the issue of having to buy new wheels (or a new freehub) to go to the range of 12 speed. Great solution, probably gonna put this on my bike once the cassette is worn!

[@MrKipperfish]

Well established that the Shimano specs for grx 11 are VERY conservative. 11-40 on the 2x and 11-46 on the 1x RDs has been proven possible for years now. That's plenty for most gravel riders.

[@Fango925]

@@MrKipperfish eh you could run 46 but depending on the bike it's not optimal. Plus, I'd rather run 40/11-51t than 38/11-46, especially when gravel is turning more and more aggressive, lots of people run grx on Dropbar ATB's/MTBs so while 32/11-46 is fine for 11speed mountain, it lacks the higher end that you need riding pavement. 51t opens up a few different build options that 46t doesn't

[@LukeRichardson1981]

@@Fango925 I agree. I run 46 on my RX812 derailleur and while it does work it's not as smooth / precise shifting as Ultegra R8000 was for me.

[@habanerooperations8432]

Why not use Ultegra RX?@@LukeRichardson1981

[@lastfm4477]

@@MrKipperfish I have an 11-42 with my GRX 10sp RD.

[@stevekelly6544]

The Maverick Reynolds 725 gravel frames look really nice- their single speed bike is nice too.

[@DailyBag]

Glad to see the pull ratio is almost the same 💯

[@TheBikeSauce]

"Almost" could mean identical - I didn't confirm that.

[@FlipperInc]

For those w sora 9 speed shifters you can run an mtb 9 speed rear derailleur

[@edzif]

I've been using Sensah Ignite brifters with Shimano Alivio 9 speed 11-36 for a year. It runs smoothly. I'm really happy with the results. Very affordable, too.

[@Konskeert]

I did a bunch of audaxs and my first multi-day ultra cycling race event on sora shifters and deore 9 speed RD. Works well and is robust.

[@roypennock8046]

My LBS did a conversion on my 2023 Marin Gestalt XR (standard GRX 800 1x, 11-42 11 speed w/ 42T chainring) at time of purchase using a M5100 11-51 cassette, Deore RD-M5100 derailleur, a CN-HG601-11 Shimano chain (OEM was KMC) and a Tanpan on an exchange basis so it only cost me about CDN $100 after the parts credit. I am coming into 700c wheels and drop bars after 35 years of casual 26" flat bar MTB riding and I can say I'm very happy with the results so far!☺

[@nmonye01]

How does it shift?

[@roypennock8046]

@@nmonye01 I've put about 250km (155 miles) on the bike and so far, apart from some rider error as I am new to drop bars, it's been excellent. 👍

[@pieterlyssens7167]

Great job love the videos always looking forward for the next. I’ve been riding the Grx 812 11speed straight from the box with the deore 11-51 for 3 years no issues. I saw your video immediately ordered a 822 long cage and gave it a try for my next build but the grx 822 didn’t work. I worked on it a few hours a day for a week and ended up buying the 812 again.

[@TheBikeSauce]

You’re not the first to say that. I don’t know what to say, this video shows it can work. I think some may have confused what I meant by maxing out the high limit. That’s kind of a key point, and the indexing is shifted up by one cog

[@pieterlyssens7167]

Thanks for your response. Your video shows clearly that the Grx 822 works i still believe it would work. When I have a bit more time going to try it again maybe the frustration took the best of me and did something wrong keep you updated.

[@cruciforme2]

I didn't the change too and looking at the alignement it seems it doesn't work... I'll check my derailleur hanger to be sure...

[@pieterlyssens7167]

Next go ad it changed everything again all the hoses cables make sure all the alignments and limit screws were correct. Wish I had something else to say but it didn’t work.

[@phantomracer1050]

I'm exactly the same. Swapped my 11-42t for a 11-51t running on an 11-speed GRX 812 and it works straight out the box. Just had to wind the B limit screw right in and stick on a longer chain and it was good to go. I did try the 12-speed GRX 822 initially but the alignment was way off and it was never going to work (even with the high limit maxed out). Just something to be aware of if you do try this conversion. Give the cassette on its own a go first as you could save yourself some cash 👍

[@DETarch]

Thank you for providing another compatibility data point (with supporting video evidence!) of this combination. There are a few instances of folks doing it on Reddit, and based on those, I just grabbed an RX822 for this same setup, but with GRX400 10 speed brifters paired to an 11-48 Microshift 10 speed cassette. I've got a Garbaruk cage on an RX812 currently which works fine, but glad to have more options!

[@gustotrails]

You used a 12 sp grx with 10sp brifters? Im genuinely interested as im tired of my 2x10 grx and I want to get rid of one chainring

[@DETarch]

@@gustotrails 10 and 11 speed GRX are all the same pull ratio, so the parts are all interchangeable. The shifters just determine the number of speeds that the rear derailleur moves. So if 11 speed GRX shifters in this video work with the new 12 speed GRX rear derailleur, the 10 speed GRX400 shifters should also work to shift the RX822 across 10 speeds and allow for the use of a wide range 10 speed cassette (eg Microshift 11-48). My RX822 is en route to me currently 👍🏼

[@timothydoyle8269]

Correct me if i am wrong- i have GRX 400 2x , your saying that if when using the GRX 822 RD paired with the microshift 11-48 cassette. So a wide range 46/30 x 11-48 works in this instance? I’ve been running 11-40 on stock GRX 600 rear derailleur for loaded bikepacking and this would add a decent gear range without having to buy a new group set.

[@DETarch]

@@timothydoyle8269no idea if this would all work with a 2x setup, all of my experience is with 1x, sorry!

[@Gregorius421]

​@@timothydoyle8269 The RD pull ratio would be the same whether 1-by or 2-by. The problem is how much chain slack the RD can absolve, that's the "Total Capacity" in the specifications. RD-RX822-SGS Total capacity is 41T (usually a few more still works), however your huge range 46/30 x 11-48 would need 46-30 + 48-11 = 16+37 = 53T That's a lot of chain to keep tight, I don't think the RD would be able to. In 1-by 48-11 = 37 < 41T would easily work, even 52-11 = 41. With 2-by the official max would be 46/30x11-36 (46-30 + 36-11 = 16+25 = 41). Another commenter said 46/30x11-40 also works with GRX 11-speed.

[@Tuehl00]

Great Video. Followed the guidance and converted my bike to this 11 speed mullet with the bigger 51T cassette. It’s awesome 😊😊😂

[@andrewolzon8352]

Hi, what is your opinion after one month of using it? Any issues araised?

[@Tuehl00]

@@andrewolzon8352, after 400km on it, I have not had any issues. It’s been all good 👍 😊

[@Dadstrails]

I'll be doing this to my warbird. I'm in Indiana and my rides are typically 40-125 miles. Not much elevation here but I try to find what elevation i can and it ranges from 3-7000 ft of gain. I need just a tad more than what the 11-42 cassette and 40t chairing provides.

[@Gregorius421]

0:49 The pull-ratio of MTB and road Shimano rear shifters was compatible until 9 speed. Even a 10-speed road brifter (except Tiagra 4700 and 10s GRX which is compatible with 11 speed) can be used with a 10-speed cassette and a 9 speed rear shifter.

[@davomccranko]

I have a Tiagra 4700 shifter, I want to use with a GRX cassette. I've read that the 812 pull ratio works almost perfectly with the 4700 on 10 speed cassette. Would it be the same for 822-sgs? If you know about that. TIA

[@Gregorius421]

@@davomccranko I don't know much about the RD-RX822-SGS (12-speed). As I recall 12-speed derailleurs have a different pull ratio from 10-speeds, so it wouldn't shift well with the 10-speed 4700 shift lever.

[@pipi1485]

Same Thing should work with 10 speex GRX parts. A GRX 400 brifter can shift an 11 speed GRX 1by rd. But only for 10 speed cassettes ofc

[@A3welg]

Who makes long range 10 speed cassettes?

[@pipi1485]

@@A3welg the 1x11 grx Rd officially clears a 11-42 cassette, Shimano makes a 10 speed 11-42 deore cassette that can be used.

[@DETarch]

@@A3welg Microshift makes an 11-48 10 speed cassette. The version with alloy carrier is reasonably light too.

[@TheBikeSauce]

Right. For 10sp, there are more options available. Microshift for instance. It gets trickier with 11 speed

[@martinmaertin]

10 speed GRX should share the Tiagra pull ratio, which is different, but I might be wrong.

[@dantsai]

Does the RX822 rear derailleur support a 11speed chain, or does it require a 12 speed chain (as a tech newbie, I wonder: are the jockey wheels specific to the width of the 12s chain?). Also curious: Is this an "officially" supported setup by Shimano, or just something that happens to work because of the identical cable pulls between 12 and 11s? Thanks for the great tip!

[@TheBikeSauce]

I'm 99% sure you can run an 11sp chain with the 822. Jockey wheels wouldn't have any effect on it. This is definitely not officially supported by Shimano 😀

[@dantsai]

Cool, thanks for this!

[@glenslough910]

I’d love to know what you mean by maxing out the high limit screw. I bought the derailleur to try this and haven’t found the need to wind the high limit all the way in or anything. It had to be wound in a bit but only what seemed normal for setting up a derailleur. My results aren’t as good as yours. My shifters are a bit old and beat though. There seems to be a compromise between the derailleur shifting into the low gear easily but not shifting up to the last 3 high gears easily or not getting into the 51T at all and having good high end shifting. It’s probably a bit better than the performance with the tanpan and RD-M6100.

[@cruciforme2]

Maxing out limit screw doesn't make much sense. I did the migration and by looking at the alignement between the pulleys and the cogs it's clear it's not compatible.. the derailleur doesn't move enough and isn't aligned anymore at the end of the cassette.. I'll buy 12 speed brifters..

[@glenslough910]

@@cruciforme2actually, I gave it another go and re-set it up. Works better than the tanpan at least! Thanks @bikesauce

[@CycleXplorer]

Love it. Was thinking about going 12x but may try this. Could it bodge to work with a front mech or is that a step too far 😂

[@icorlaiti]

Can you please try the compatibility between cues and 105?

[@marciosouza2210]

Very nice video. Greetings from Brazil. From what I understood, it is also possible to use GRX 822 RD with R7000 105 STI, with a 1x11 setup.

[@travischapman6763]

This is what I hope to do.

[@MichaelLeiBarrientos]

Hello, this is my question by the way... can you get to use GRX 822 RD with R7000 105 STI, with a 1x11 setup?

[@jmdrstv]

When I had GRX 11 spd I went with a e13 Helix 9-46 and a smaller chainring and it was flawless, light and no other mods. GRX is a great group. Still my favorite hoods and brifters

[@gabrielfong]

Is it sloppy to shift down to the 9t cog occasionally? I've heard/read so.

[@jmdrstv]

@@gabrielfong not in the slightest. I think that was an issue many iterations ago but the Helix series of cassettes are excellent in my experience.

[@ukasz9776]

Whoa, that's good news! I'm building a new bike and brainstorming drivetrain options right now. I guess I will go the same route as you did and couple R7000 brifters but mix 12-speed GRX derailleur instead. Looks like that would be $400 for the whole thing (I already have a GRX crankset) which is really nice.

[@michaelmechex]

I wouldn't do that for a new build, at least here in europe 12 speed GRX shifters cost 20 euros more than 11 speed, that's worth it for more gear range. Also either is cheaper than mechanical 105.

[@adam1885282]

I have the parts sitting on my desk, hope to try it this weekend, thanks for the inspo. I do wish 11 speed mtb was compatible

[@ianiscaratti4924]

Does it work?

[@huaweipneun7624]

does it work?

[@NatalieUoker]

10 speed grx (and tiagra) also have the same pull ratio. So it should work with 10 speed shifters.

[@since1990vfb]

tested it and did not perform very well - all the gears were shiftable in the stand but I was never satisfied with the qualitiy / crispness of the shifting…

[@NatalieUoker]

@@since1990vfb I will test the 10-speed levers on my own with a 12-speed derailleur. Now I tested the R7000 levers with the RX400 rear derailleur (it replaced the R7000 on my road bike +). It works great.

[@vbnxt]

I’m on a 2x10 GRX 600/400 setup and want to try this too. Curious how your experience was. Thanks

[@davomccranko]

How salt with the Tiagra 4700.10 speed shifter? I heard it might be a good match

[@jeremywishart9934]

This is AWESOME! Thanks for testing and posting this. Just ordered all the parts.

[@alecs616]

Hello! Did you try it? I just installed this setup but with a 11s xt cassette and it does not work.

[@jeremywishart9934]

@@alecs616 Yep, I installed everything this past weekend (been to busy w/ work to get to it earlier) and it works as good...or maybe even smoother....than the older GRX stuff it replaced. A couple of thoughts to consider - is the derailleur hanger straight (?) and did you install the Shimano chain in the correct direction? New cable and/or housing? Did you back off all the preload on the old cable if you kept it and readjust accordingly?

[@alecs616]

@@jeremywishart9934 checked the hanger, new cable and housing, all done by the book. It does not work. It does not go all the way to the largest cog, it stumbles around the 7th. And the shifting is crappy. However I tried another logic. Maybe it works on a 12s cassette. So I pulled out a microspline freehub, a 12s SLX cassette and chain from my MTB spares bin and installed them on my gravel. And it works perfectly, I can either use 10-45 range or 11-51. And this is kind of great. Huge range.

[@huaweipneun7624]

did it work?

[@alecs616]

@@huaweipneun7624no. I’ve done a second testing. Another cassette, another shifter, new cables. I managed to get it to shift slightly correctly, but it was horrible. Not viable for real world. I returned to my previous setup, with 12s but using only 11 of them.

[@SHWELL11]

This video answered my question asked on another video today. Thank you!

[@dillroastington]

Friction shifting! This is why Russ worked to get that 12 speed friction shifter made with Merry Sales! Stop letting them sell you manufactured problems like road and mountain incompatibility.

[@TheBikeSauce]

Haha the UNO works really well technically, but it isn’t for everyone. I enjoyed it because it worked with everything, but I’m too used to quick shifts from the hoods

[@YesheadDrive]

Hey There! Thx for your video! Compared with the other solutions (goat link, longer MTB cage) would you consider the 822 derailleur the best way? I tried the mtb cage combined with the goat link (the longer cage just wasn’t enough to fit in the 11-46 cassette) and I’m quite happy with the result but due to some noises the drive train makes I was asking myself if the performance would be better With the 822 derailleur. All the best !

[@paranza6996]

You say that cable pull between road and mountain have "always" been frustratingly incompatibles. This is not really true, as until 9 speed, everything was compatible with everything ! Which make 9s peak technology in my opinion...

[@TheBikeSauce]

Yes, you’re right! I guess ‘always’ referred to post 11-speed stuff.. which is not really always 😆thanks

[@Gregorius421]

9 speed is great for budget road/gravel bikes with big range.

[@janeblogs324]

5:58 the upside down headset is a nice touch

[@Ostentatiousman]

Edited my comment because I was dumb and figured out why my setup didn't work. The RX822gs is rated for a 45t low cog and I was trying to use a 42t, this makes a big difference on these shadow+ derailleurs. Well, I setup my road bike 1x11 and got it down to 15.8 lbs using old and aliexpress parts, just have to order a different derailleur now

[@TheBikeSauce]

Ratios are close, not exact. The owner is still riding this setup weekly and it's smooooth through the whole range. It just takes a bit of extra attention to detail in the setup.

[@davomccranko]

Help! Ive heard the GRX 812 rear derailleur will work on a 10 speed cassette, using a Tiagra 4700 brifter (hydraulic brakes). And confirmation of this? I heard the pull ratio works out just about perfect. Would this be the same for the 822? Of course, with a 10.speed chain. I can't find info on 822 pull ratio anywhere.

[@benjaminpk]

I was really hoping this would work. Thanks for confirming.

[@littlewing1208]

So let me confirm: you can use 11spd GRX brifters to drive a 10-51 12spd cassette by adding the 822 RD but do you have to choose which of the far gears that you ‘eliminate’? Ie the 10 or the 51 since the brifters only will operate 11spds? Edit: I see you actually use a 11spd 10-51 MTB cassette, nm.

[@mattdidisheim2211]

Wide range mtb derailleur with drop bars is possible with the Jtek shiftmate 9. I ran nx eagle derailleur, 11 speed 11-50 cassette and apex shifters for years with this.

[@nickobec]

Unless you are running mechanical SRAM in which case you just add GX 10 speed long cage rear derailleur to your 10 or 11 speed drop bar bike and have the options of up to 2x11-42 or 1x11-46. I have throughly tested the 2x11-42. SRAM mechanical the pull ratio is the same for 10 and 11 speed road and 10 speed MTB.

[@danielpeters2708]

Hey man, this is great news as I was about to pull trigger on Garbaruk parts. I'm really interested in how the 12sp chain works and if you find the 11sp a better option? I'm concerned the 12sp jockey wheels wont like the 11sp chain. Thoughts?

[@balrog687]

this might work with 10speed too, I have a nice ultralight 10speed 11-50 cassette to try

[@maritimezombie7684]

Wish I had seen this before dropping the money on a Microshift Sword group. Will definitely upgrade to this once I can. Great hack thats not a hack. Awesome video!

[@maritimezombie7684]

The other great part of this is you have hydraulic brakes compared to Microshift, so this is like the best option for a MonsterCross build!

[@vc1954]

I’m going to ask another question since you answered the first one! Is there any casette that will work that has a closer to 500 % gear ratio? I have a 10-52 on my grizl and absolutely love the low gearing for steep climbs. The link in the info section is for a 11-51, I just bought a crank with a 40t chainring, guess i could get a 38t, but i havent bought the cassette yet - and would like to avoid something monstrously expensive if possible

[@risaramadhan525]

From the video example above, can you use the 105 brifter?

[@Oleg_Bu]

I think just because of 12 sped chain - it somehow works on video. narrower chain gives larger gap between sprockets and it didn`t make noise of friction.

[@DonnieX6]

There actually should not be any need to swap out the front ring, as 9 to 12 speeds chains all have the same inner width of 2.18 mm (11/128″). Only the outer width is different for each chain type, and as it is a 1x setup, the outer width does not matter. Great video btw!

[@VladGoro25]

didn't know 11 and 12sp chains have same inner width. interesting

[@TheBikeSauce]

Yea I thought the same. Wolftooth does differentiate, however, between their Dropstop B, and Dropstop ST version. Not exactly sure the difference, but it worked pretty well in this case.

[@MrKipperfish]

@@TheBikeSauce The difference is clearly explained on the product page for every single wolftooth chainring that comes in a ST version. It's all about the extended inner plates, look at the diagram. The effective inner width is NOT the same as 11 speed when it comes to 1x. In the case of WolfTooth, running a 12 speed HG+ chain on a 1x ring made for 11 speed shimano chains will be louder and will wear the ring (and likely the chain, though chains are much harder than rings) faster due to the interference of the extended 12 speed HG+ plates with the wider wide teeth on the 11 speed ring. There's really no reason to run an HG+ chain in the setup detailed in the video. The only consideration would be for pulley wheel fit on the chain, but I doubt that will have an appreciable effect on shifting performance. Shimano has always had a rather loose fit of pulley teeth on the chain in the laterial dimension, and doesn't do narrow/wide pulleys. So as long as those 12 speed pulleys have teeth which are the same or very close width to 11 speed pulleys, shifting should be pretty much the same.

[@DonnieX6]

@@TheBikeSauce Oh yeah, seems like Shimano indeed changed the internal shape with their new 12-speed HG+ chain a bit from their 11-speed counterpart even though the internal width is the same, interesting! I only use up to 11-speed on all my bikes, up until here everything plays nicely together ;)

[@dropbaran]

Yep, across 9 to 12 speed chains only Shimano HG+ (12-speed) is internally different and doesn’t play well with 9-12 speed single chainrings

[@johnnigri7269]

Cool ! Will it work with a 105 11 speed shifter? Also can that derailleur work with a 2x cranks?

[@christophericcio]

I want to know that too! :D

[@TheBikeSauce]

I run R7000 105 shifters with GRX812 on the Outback. Works fine. It'll work with 2x, but not with this large of a cassette. Total drivetrain capacity would be too high.

[@AW.SO.M3]

So to simplify, this setup is using a 12s cassette along with 12s RD with 11s shifters? With this info, we should be able to use other 12s cassettes

[@TheBikeSauce]

Sure, but you can only use 11 of the gears

[@uknowbass]

I have the GRX 815 DI2. With DI2, you can just add the XTR Shimano derailleur (tho a bit more pricey than $127)

[@MozzMataz]

Hey Nolan, thanks for vid! Speaking as someone who hasn’t had their coffee yet, it seems like there isn’t any reason this also wouldn’t work with a 2x setup. What do you think about the possibility of pairing this hack with a wide/low double for even better climbing capability?

[@TheBikeSauce]

Morning! You mean a 2x paired to an 11-51t cassette? Perhaps in theory, but I’m not sure there’s any rd with that total capacity

[@vongdong10]

It won't work. I tried doing this with a sram rival axs setup with a 10-52 cassette and 43/30 crankset. There is too much of a chain slack in the large ring and small cog. Like there was no tension at all.

[@mattkavanaugh5623]

I was wondering the same thing. I have 2x GRX that I would like to make wider range in the rear cassette. Currently I have a 31x47 chainrings and 11-36 cassette with RD hanger extender. Shifting is workable but not great. Would this GRX RD hack with long cage work if I converted by 2X to 1X chain set not by changing the cranks but simply by using only one chain ring? Thanks for the great videos.

[@TheBikeSauce]

@@mattkavanaugh5623 I wouldn't run just one of the original 2x chainrings. Rather, you can get a Wolftooth dropstop 1x narrow wide chainring for the GRX cranks.

[@AG-el6vt]

There is only one series of 10+ speed rear mechs I can think of that can reach close to that capacity: the Microshift XLE. E.g. the RD-M665L model, with 47T capacity and max 46T big cog. A sub-compact 2x crankset, e.g. 46/30, would only really work perfectly with 11-42T without getting in trouble. As I don't own one, I don't know if you can go bigger than that as you can with most Shimano derailleurs, but maybe someone out there has tried it out?

[@zdravo4]

Yes it will. I used M5100 cassette and RD-M8100 rear mech

[@TheBikeSauce]

with GRX brifters..?

[@zdravo4]

@@TheBikeSauce no, regular M8000 shifter and M8000 brake levers

[@kad1017]

Taking out the money part of it which do you prefer, the Garbaruk you used on your Ritchey or this all Shimano solution?

[@JoannisLasaridis]

2:22 1:31 What exactly do I have to do to limit / restrict the 12-speed GRX RD-RX822 SGS rear derailleur to 11-speed? This was explained to me too quickly in the video. Are there step-by-step instructions for doing this yourself?

[@icorlaiti]

Wait... Since GRX is compatible with 105, I can also use it with my RS505! 🤩🤩🤩

[@jeffandersen6233]

A real bike shop with cool stuff and serving coffee. There is hope.

[@danielpeters2708]

Hey @thebikesaurce, i tried this on the weekend without success. On a 2022 Giant Revolt with an existing 1xGRX 11sp setup. I used the CS-M5100 11-51 11sp cassette, GRX RX 822-SGS and a new 11sp chain. Unfortunately, for some reason, the 39t sprocket skipped, clunked and carried on. No amount of indexing or B-screw adjustment (noting new position) worked for me. Every other gear was flawless though. I also tried a different wheelset, new quick link, new cable, hanger alignment, however it made no difference in that 39t sprocket. I also tried a 12sp chain however it wouldn't interface with my 11sp GRX chainring. What would you suggest i try next? 12sp GRX chainring and 12sp chain perhaps?

[@TheBikeSauce]

39t cog - as in the 3rd largest cog on the cassette? That is very strange if all others worked fine. Sounds like the only variable you haven’t considered is the cassette. Could you try a different wide range cassette?

[@danielpeters2708]

@@TheBikeSauce Yeah, the 3rd largest cog. I dont have another wide range cassette to test with. I did think that the chain could be clipping the rivets on that specific gear, hence why you had more luck with a 12sp chain (slightly narrower). I should also state, this only occurs under load, it is not noticeable in the stand.

[@lethbridgecarboot5388]

Did you solve this issue?

[@danielpeters2708]

Hi@@lethbridgecarboot5388, no unfortunately I haven't revisited the issue since. I have however, read numerous reports of CS-M5100 cassettes being returned/replaced under warranty due to the rivets being loose and the 4 largest sprockets moving independent of the entire cassette body. In my case, there's a small amount of lateral cassette movement (within tolerance), and the rivets appear intact. I'm yet to check a few other online references such as the cassette splines/freehub body interface however i would assume the issue would occur underload in any gear if that were the case.

[@lethbridgecarboot5388]

Good luck with that - curious to see how it works out. Cheers

[@green_building]

Im sure that anything goes here will be proven. . i watched how he tests some torque wrenches, calibrated it and dismantle it (he did destroy small ricthey Torque wrench ) So if other mechanics said, this GRX wont work with that and with this and etc.. as long as this channel approve, that means work 😁

[@cruciforme2]

As i understand it pull ratio are actually completely different but somehow compatible. If pull ratio were the same it would work too but with a 12 speed casette using only 11 speed of it. I would love so hear long time report to see if it's not to finicky. Edit: my bad, pull ratio should be identical for it to work. Cable pull on the shifters is probably different.

[@stephenbrgoodall]

This is good information, I was hoping to pair some 105 12s levers with a otherwise 11s ultegra bike

[@juliusebora4697]

Would this work with R7000 STI? Just want confirmation

[@MichaelLeiBarrientos]

Same Question with me and using a 1-by setup

[@Scottcharliemurphey]

Hmmm, I attempted this and am having issues, maybe you could shed some light on it for me. I have the 11 speed ST-RX600, RX822 SGS derailleur and the 11 speed 11-51t cassette and I can’t get it to shift to the 51t. I can push the mech and make it move the chain up to the 51t but I’m unable to shift it there, but have no problems shifting from the 11t to 45t. Conversely, I can set up the derailleur to shift from the 51t to the 13t but not to the 11t. Uncut KMC x11sl chain. Love your vids, especially the deep dives!

[@cruciforme2]

I personally think the pull ratio doesn't match and works more or less. There are now too many reports of issues.

[@TheBikeSauce]

Sounds like a limit screw is too restrictive the moment. Have you backed one out a bit? You only need to limit the rd at one end

[@mbrackmann8]

In theory, this could be done as a conversion from GRX 2x to 1x right? If I kept my same cranks, switched to a 42t chainring, got the RX822, and this cassette, my setup would be the same? I have the same bike featured in this video just with the 2x

[@JeffRevell]

I'm riding a Canyon Grizl 6 with a GRX 10-speed 2X setup but I really want to decrease my gear inches on the low end. The GRX-400 rear derailleur is paired to an 11-34 cassette and the front 2X chainring is an RX600 crank with 46-30T rings. I would love to get a larger cassette and/or smaller chainring to help with lowering my gear inches as I use the bike for touring and climbing with an added 50 pounds is really difficult at 25 gear-inches. As it stands now, the rear derailleur only supports up to a 36T cassette, which does almost nothing to lower the gear-inches, taking it from 25 to 23. The goal would be to get that to sub-20 but I am having a time finding drivetrain combos that would work. Any suggestions?

[@kewnlovesgravel]

Always askes myself if that could work. Thanks for the Video 😮

[@moobaz8675]

Thanks for that. It's good to know.

[@sergiustancu561]

Which of the components will show premature wear? Aren't the grx 822 wheels too thin?

[@TheBikeSauce]

This will wear the same as any other wide ranging 1x. Grx 822 wheels aren’t a thing. Are you referring to the rd?

[@cthulpiss]

I believe cable pull was the same up to and including 9-speed Shimano, and only after 10-speed DynaSys made it worse/impossible to mix mtb and road rear mechs and shifters

[@Jacob99174]

Really great video, and thanks for the shop reference

[@chrisvejnovich116]

This is a great vid! I'm waiting for the grx 11 speed brifters to be on mega sale, then I'll pull the trigger on this. I'm currently running a microshift bar end with a M5100 rear derailleur. BTW....the M5100 and the grx 822 rear derailleurs look very similar! I'm assuming the pull ratios are slightly different?

[@黄辰旭]

You need the shimano road pull ratio shifter to run the grx RD. GRX and MTB share the same cassette, but the pull ratio of RD is different.

[@michaelsherwin4449]

I want to do something similar on a road bike. My new bike has Shimano 2 by 12 mechanical 50/34 and 11/34. My idea is to get the GRX derailleur with a 12 speed 11 to 51 cassette and replace the 34 up front with a 47 tooth chainring. I call this setup "inbetween" gearing. Others call it "halfstep". This yields 24 unique gear ratios over the entire range. What are your thoughts and would it work? Thanks

[@Anton.M-np6ky]

did that require to change the 11s chain to 12s chain due to much larger size of the 50T?

[@alexball5907]

I had some trouble getting this to work, but the problem turned out to be chain length. On my 36t chainring, I needed to add two links to the chain to get the correct chain length. The standard Shimano XT chain is 116 links, which is ok for 34x51, but for 36t you need 118 links. When I finally found the dealers manual it says you might need to add up to 6 full links! So frustrating that the standard chain length is too short.

[@ElPasoTom]

Any chance this will work with the GRX 2x11? Would I be fundamentally better off with a 1x11 like on my MTB? I've just managed to get the 30x46 and 10-42 to work together but I wouldn't mind a 46t or higher cassette

[@arjanschild3552]

Very interesting! Would this mean I could use the same RX822 SGS in a 2-by setup with 46/30 front and 11/40rear? Yes I know there is still a capacity issue,...but at least it is getting closer...

[@TheBikeSauce]

Ha true, you’re just limited by capacity at that point. Although an 812 can easily handle up to 46 big cog with no mods

[@arjanschild3552]

@@TheBikeSauce The capacity of the 822-SGS is 10 teeth more than the 812

[@Konskeert]

So...if the tiagra47XX and grx600 10speeds RD/shifters are compatible with the 11speeds R-series and grx810/812. Does it mean the grx822 rd is compatible with tiagra 47XX and grx600 shifters? And finally bring massive gear ratio to road 10 speeds???? 😮

[@thegorillaguide]

Does this mean my RD-RX812 derailleur can be used with a 12-speed cassette if I upgrade the shifter?

[@Frorideism]

No no no noo! This is all wrong, You need to cash in at least $1000 to get your shifting to work at least the slightest, there are no shortcuts. Best regards, Shimano. Ps. please give us more money, we do need more money

[@TheBikeSauce]

lol

[@siphotchala5202]

what about for a 2 x 10 grx 600 crank set?

[@ImSpecializedPL]

Bro! 810 series works with 2x11 and 42T cassete without changing anything :) Also Sram 11s cx derelieurs works with Shimano/Sunrace 11s 51/50 cassetes but you need to put 12s Eagle cage nad pulleys :)

[@TheBikeSauce]

missing the point?

[@MichaelLeiBarrientos]

Hello Friend, I would like to ask if the RD-RX822-SGS would be compatible with a Shimano 105 R700 sti?

[@MichaelLeiBarrientos]

I am planning to put the 12 speed RD with an 11 speed casette, 1x setup... THank you @thebikesauce

[@LOZUPONEJ]

Wolf Tooth tan pan no good?

[@gvlbike]

Genius👍 good idea bro,thank you!

[@virginiascurti5036]

Can this be done with the 810 RD?

[@Oleg_Bu]

I tried to migrate from GRX600 2x11 to GRX610 2x12. I bought 2x12 shifters, 12sp cassete and 12 sp chain. Rear derailleur GRX812 remained and it doesn`t work with 12sp shifters. 12sp shifters pull little bit more cable in 1 click. So if smallest sprocket works fine, - coming to the larger sprockets - chain starts to rub larger sprockets and needs to let loose the cable. After this - larger sprockets work fine but smaller work worse - needs to pull up the cable again.

[@nbprotocol5406]

One By drive trains were made popular because Bike manufacturers wanted to sell some stuff , that is their highest priority. OneBy's kinda suck though for a lot of reasons. If you haven't spent a few years riding a TwoBy drive train then you wouldn't know what I'm talking about. When you bend the granny gear on your 1by then you may get it, if you are strong enough to do that. Quicker shifting transitions between down hill and up on a 2by also.

[@TheBikeSauce]

I spent about 25 years riding 2x (and 3x). 1x has its place in the modern era. No one's bending the big cog because they're too strong 😆😆

[@ramdanirizki19]

what use chain? 11 or 12 speed?

[@Likelybiking]

I need to go to maverick! I just live 20 miles north east!

[@Glebaka]

Sensah srx/sram rival 1x shifters and sensah srx rd and you can ran everything you want up to 11-52

[@andrewabdelmalak6442]

Can you please tell me what shifter are you using? I am using an 11 speed GRX shifter (RS505) and it is not working

[@jasonhughes2841]

I tried it, didn't work for me. Higher gears (small cogs) worked, but got progressively shorter of each next gear beyond the first few. I tried multiple bikes and multiple combinations of shifters; grx 810, r7000, r8000, r5800. I tried 11-46, 11-40, 11-34. All had the same repeatable issue. There must be a very narrow/specific setting that works and I'm missing it. Interestingly, this mullet shifting problem is very similar to when my hanger has been out of alignment. Either way, too fussy for me to wanna deal with out on the road if anything gets bumped out of alignment.

[@TheBikeSauce]

Bummer, sorry you wasted your time. I just rode with the guy whose bike is featured in this video. Same drivetrain still going strong after hundreds of miles and several weeks. Donno what to say. Seems like some people get it to work, others not so much.

[@JoannisLasaridis]

2:22 : What exactly do I have to do to limit the 12-speed GRX RD-RX822 SGS rear derailleur to 11-speed? This was explained to me too quickly in the video. Are there step-by-step instructions for doing this yourself?

[@bryanferrer3465]

May i also know the teeth count of the chainring being used in the video. Thanks

[@centuryghost]

This is the first video I've seen on this, thanks for posting! BUUUT, Ive heard of this on Reddit and Weight Weenies and went to try it myself. I run the 11 speed GRX on my Redwood and wanted more than the 46 limit for the Cascades. I got the RX822 SGS and the M5100 11 speed cassette using a 11 speed chain with a Wolftooth Drop Stop chainring. Set it up and could not use more than 10 of the gears regardless of my knowledge of indexing. Could you do a more step-by-step on this? LBS won't touch it but I know it works!

[@TheBikeSauce]

Some things to try. Make sure the hanger is straight. Set b limit screw according to the gauge on the back of the rd cage. Max out the high limit screw, and adjust low limit to prevent chain popping off the high side.

[@ishithereyet]

Will this work with R7000 shifter?

[@ptrmrls]

What limit screw did you adjust to kill off the 12th click?

[@TheBikeSauce]

High limit

[@ptrmrls]

Thanks!@@TheBikeSauce

[@andrewabdelmalak6442]

I tried that with GRX 11 speed shifters, RS505 with the derailleur RD 822 the shifting is not right!

[@bob58bois]

Would you say this is smoother then the 25$ upgrade ? The 25$ version doesn’t work as smooth as I hoped it would

[@ekskdks]

This is work to bring comfort when going uphill. It's the best solution than upgrading other parts, so don't worry and try it.

[@hansschotterradler3772]

So you're saying that 11-speed shimano shifters work with 12-speed shimano derailleurs ?

[@TheBikeSauce]

These do 👍

[@martan9000]

Can i get my understanding straight or at least confirm what i want to so with my MTB on 1x SLX. I'm planning to prep my MTB with dropbars. So I'm going to need 822 RD and brifters, right?

[@Olmekc]

Sorry for the late comment but I’m really hoping someone responds. Currently building my 1x up and rolling component options through my head. I have the Gevenalle CX shifters on the way which are compatible with GRX but only up to 11 speed with the index (I could just switch it to friction so I have full 12x functionality if I really wanted to). I also know the GRX 11 speed derailleur is compatible with the SRAM 10-42. So my original plan was the GRX 11 speed derailleur with the SRAM 10-42. However I’m now thinking that I should instead get the GRX 12 speed due to it having a better cassette range and setting the limit screw initially so I can’t over shift. This way I have more cassette options in the 1x11 and even the ability to switch to 1x12 with the change to friction shifting if I wanted. I guess I’m just looking for the confirmation that this does in fact make sense due to the advantages of the GRX 12 speed over the 11 speed. Thanks for anyone who reads this and responds!

[@RyanBolesta]

does the pull ratio being nearly identical mean that I could run Shimano 105 11 speed mechanical brake shift levers with a 12 speed GRX group set?

[@simonecappello8958]

Sorry for asking but do you mean it can work with the same GRX shifter of the 11 speeds? The 11v speeds shifter works also for the 12v? Is that real?

[@TheBikeSauce]

Yea, the 11sp shifter works with the 12sp derailleur in this case