Shimano Di2 Hacks | Get The Most Out Of Your Electronic Groupset

[@gcntech]

Do you have Shimano's Bluetooth unit installed on your bike? What's your favourite feature? Let us know in the comments below!

[@Ed.R]

No but got bluetooth on my homemade automatic shifting system. Means I can program it to have any features I want. A fun one is putting it in manual and making the bike shift from a distance using a phone. Just because I could I also have the rear light controlled by bluetooth. The most useful feature apart from changing settings is data logging for performance optimisation.

[@andrebaron1387]

I want the bluetooth unit, but it means I have to also upgrade my battery too. Ideally I'd upgrade my shifters and move the junction box to a bar-end one.

[@BetterShifting]

BetterShifting is a Di2 site, so yes ;-). The Wireless Unit EW-WU111 / EW-WU101 is a nice to have, but not essential if you ask me. Still... I mainly use it to quickly see my current gear, look at gear stats and view the battery level on my Wahoo.

[@ianmearsphoto]

Nope, doesn’t seem particularly good value as you can do most of the same stuff by hooking up your laptop. I can live with not being able to see gear info on the Garmin 😊

[@seascape]

@@BetterShifting Your site helped me a couple of weeks ago, when, after a recent upgrade to the app and firmware, the app required the Di2 pass key which I had forgotten. (Previously, E-TUBE did not require it.) Had to reset it by connecting my bike to my PC. Thanks for the tips!

[@cypercharged]

I bought my Canyon Endurace CF SL in August. Before then I was even not aware what Di2 was... It didn’t have the Bluetooth module so I bought exactly that and set the top buttons single press to switch page left-right, hold left for map, hold right for ascent profile, double-click left for new lap, double-click right for lap summary. And add Di2 battery percentage on one of the data field. All this on a Garmin Edge 520. Amazing and real game changer!

[@alejodazas9824]

So, is this compatible with any Di2 system regardless of the groupset? I ask because when I look the wireless unit up on google it comes as Shimano Dura Ace EW-WU111 wireless unit and I have Ultegra. Probably same groupset than you as I have same model and year. Could you please confirm.

[@cypercharged]

@@alejodazas9824 it works with Ultegra and Dura Ace. They are basically the same groupset except the material in which they are made of (lighter for Dura Ace)

[@Flashback_Jack]

Thing is, you don't even need the Di2 module. You can make all the changes through the E-Tube app and bluetooth--at least such is the case with my 2024 Canyon Aeroad CF SLX.

[@mjf1975]

Just letting people know that if you have the new Dura Ace/Ultegra/105 di2 versions then you don’t need to Bluetooth module - the rear mech has it built in 👍🏾

[@vaancee]

My Wahoo Bolt will display all data. But the recording won't record gear info...

[@supernova1234uk]

How can I check if my bike needs the bluetooth module? I have a Trek domane sl7 gen 3 2022 Ultegra 105 di2. Thanks

[@mjf1975]

@@supernova1234uk If you plug into your rear mech to charge the system then you don’t need the Bluetooth module

[@supernova1234uk]

@@mjf1975 thanks for your help. Yes I plug into the rear mech and it’s a di2 12 speed ultegra bike. So does that mean I could get data to my e-tube app and a garmin bike computer without having to buy any extra parts?

[@mjf1975]

@@supernova1234uk Yes. Bluetooth is built into the rear mech so you don’t need to buy anything else. You just need to pair the rear mech with your bike computer and the device with the e tube app.

[@jfchabot]

I installed my D-Fly inside the handlebars by the junction box. Heard mixed reviews about bluetooth connection having issues keeping a consistent signal to the head unit when placed inside the seat tube. Also was concerned about potential rattle. Handlebars is the way to go Alex. A bit more work but well worth it. EDIT: Also, people, please update your components using a proper wired connection to a PC or laptop computer. Pretty sure even Shimano discourages folks from performing updates using the D-Fly and a wireless connection. Like mentioned in the clip, good way to brick the bike.

[@grimp53]

Also: prior to performing the Di2 update with the charging/junction box plugged into a USB socket make sure to unplug any unneeded USB devices from the PC (joystick, printer, scanner, ...) as they may interfere with e-tube. I ended up with a dead left shifter when it failed to update the firmware.

[@biketrybe7071]

I'm still a knuckle-dragger using a mechanical drivetrain but someday I will stand upright amongst the global peloton and all of this will make sense to me. Thanks in advance, from my future self.

[@maytersandwich]

I already have the top buttons programed to work my Wahoo, but I was not aware of the zoom feature...thanks.!

[@adamsteineke4661]

Ditto, wonder if the zoom works on Garmin?

[@jamieokane989]

Buttons work on my Garmin 520& 810- not aware of any zoom features?

[@GMoneyLove]

E-Tube software has come so far in the last year or two. It was easy to brick things because the connection and software would regularly disconnect from each other. I stopped using the phone app and stuck to connecting up a laptop because of some bad experiences. I gave it a go again recently and was very pleasantly surprised. So if you've had the same experience as I, give it another go! (PS- I found that even when the app dropped the connection to WU111 unit during a firmware update that if I was patient and worked me back the update would pick up and continue w/o bricking the whole thing.)

[@CHSS]

I had the same problems in the beginning, had to unplug the battery to get my di2 started again. Now it is not possible to use E-Tube on PC with my 100€ cable. You got to buy a 300€ cable from shimano. Rip off!

[@jonpoon3896]

Perfect since I’m just about to upgrade to DI2

[@BKMüller]

Bluetooth needs to be integrated into the system by now.

[@zodgzod]

It is on the new version.

[@IanB17]

Shimano really need to get their act together & release the eTube software for Mac.

[@matthewblue7839]

Windows only wtf ?

[@paulbartlett1231]

To be fair there's probably a much bigger user interest in iOS or Android smart device eTube than 'computers'..

[@colinwilliams9290]

Thanks for a very informative video (once again), after watching this I took the plunge and bought the bits I needed. I fitted it all this evening and after a couple of hairy moments fk me it works, I can’t believe it, it actually fkn works.

[@tomlaight]

would be cool if the gear control could communicate with the cadence sensor and you could put it into an auto mode. Like "shift as required to keep my cadence at 88rpm" or whatever

[@user-jt1jv8vl9r]

So as your cadence goes up or down the gears would react accordingly. I’ve thought this also. I’m struggling up a hill and the gears automatically anticipate and drop. Like automatic gears on a car.

[@tomlaight]

@@user-jt1jv8vl9r yeah exactly! Would be an interesting control project at the very least

[@darrylhuculak4996]

This gets me even more giddy to invest in Di2. I just hope I'm not so busy looking at my head unit screen that I ride into a ditch or parked car!

[@paulbartlett1231]

Garmin Varia Vision HUD avoids that problem however is no longer readily available, presumably because it was expensive and they never got to version two where the tech was lower cost so able to make a more affordable product that many would buy. Lesson on innovation and commerce right there. Easier for Garmin to make money on other products sadly.

[@camellatte6287]

how is this hacking ? this is just an explanation of some of the features of the dfly unit.

[@Raymond-Farts]

Yeah, it was stupid to call this hacking. I do however need a hack so my system knows I have an 11-32 cassette. Currently if you have the 9150 rear derailleur you can only go up to an 11-30 cassette in the APP. The Dura-Ace 9150 does work with 11-32.

[@williamwalmsley2940]

Think its ridiculous that Shimano don't include a wireless bluetooth module inbuilt within system. £75 for something that competitors like sram include is a bit much for a bit of plastic and a chip. Shimano could be compared to Apple as they removed the charging wire just to gain some extra cash like Shimano. Why not just act in the consumers best interests! Great video tho would I'd of loved to see a climbing shifter installed from the levers.

[@8paolo96]

ollie did it this summer if i remember correctly, just search a little

[@williamwalmsley2940]

@@8paolo96 yep he did the sprint shifter thingys but not the climbing shifter next to the stem

[@BetterShifting]

kzbin.info has pretty good videos on connecting Di2 things to levers. The SW-R600 climbing shifter for example.

[@williamwalmsley2940]

@@BetterShifting thanks I will have a look!

[@larsborghouts8360]

Totally agree this should be included with Di2.

[@dapen1163]

I use the top buttons to change screens on my Garmin830 (single click), and to turn my Garmin Lights on/off (double click) and change light modes (long click).

[@rigovinalon9176]

welp. this helps me set up my Shimano 8 speed Altus faster.

[@galenkehler]

False, there is no Altus Di2

[@rhezaandrianta2380]

@@galenkehler clearly he's joking bro, don't take it seriously

[@yahia7321]

Me too really works very well with shimano tourney

[@sachavez100]

Super video. Thanks!

[@ryanmilton2643]

This is just what I needed

[@fritzperpignand8176]

Thanks a lot. This helped me get the Dfly buttons to work

[@michaelsteven1090]

awesome..Just what I was looking for!

[@jonathanweissbart2710]

I never knew how complicated DI2 could be. All I want to do is change my gears 😂

[@GuitarguyRichard56]

Me too!

[@Bgdutch77]

It makes life so much better, al those bleutooth connections 😂

[@DEAR7340]

I restored my 1987 steel road bike, with downtube friction shifters. I don't remember how I used to shift so smoothly and intuitively! Lost muscle memory, I suppose.

[@velovieux]

Before disconnecting the cable from the battery attacha clothes peg to the cable it stops it falling into the tube.

[@stefanwagener]

Not really a hack, those are the intended features once you get the bluetooth module ... only that a lot of Di2 equipped bikes unfortunately are delivered without the bluetooth module ... which is kind of shame that it is not standard.

[@michaelsteven1090]

yup, $100 US..expensive crap for sure

[@conecrazy]

I have mine downshift when I tap the left lever and upshift when I tap the right lever. Like the F1 shifters on a car.

[@yap7656]

I see ,you're man of the culture :)

[@on_your_yoga_mat]

I would have thought about doing this until I read the reviews of the app for iPhone- don’t think so now!! Good explanation though.

[@rizzoid]

Looking forward to the SRAM AXS app version of this video!

[@8paolo96]

if i remember correctly they did something similar in the video where they presented the new sram red/force AXS

[@rizzoid]

@@8paolo96 I must have missed it. Thanks for the tip!

[@frazergoodwin4945]

I've learn't that I'm even more jealous of riders with Di2 than before. ..... "Dear Father Christmas..."

[@8paolo96]

yeah, just to be a little less jealous, this little dongle would cost you around 90€, that's more expensive than apple's dongles

[@mazerickd]

@@8paolo96 it's a bit nutty that it's not included on new bikes. Imagine dropping 5k+ and than having to spend another 100 bucks to get the full use

[@Maxwaehrens]

@@mazerickd You don't need the wireless unit to get full use of the Di2. You can still setup the entire system on a PC with the USB cable included with the charging adapter. The only thing you're missing out on is using the hidden buttons to operate a headunit.

[@tman-675]

What would be cool is I have a tt bike with D/A Di2 with just single buttons on brake hoods and aero extensions. Which means that only synchro shifting works which is fine left side to shift to a easier gear and the right to a harder gear . This would be the cool bit if like sram you could press a left and right button together and shift the front derailleur .

[@menelaos951]

Actually, this does already exist in di2 Ultegra and dura ace...

[@SimonH72]

Havent used the Bluetooth connection since it crashed the di2 system. Has it been updated and stable now?

[@veegtec]

exactly. That e-tube bricked the Di2. I don't trust it.

[@BetterShifting]

It's better, but far from perfect. Shimano's main thing is hardware, software seems to come third. Not sure what comes second though ;-).

[@veegtec]

@@BetterShifting Cheers thanks. Still nervous, but may give it a go

[@BetterShifting]

@@veegtec if it breaks just disconnect the battery or send me a message / email :)

[@marnug]

Can you use the EW-WU111 on the older moder Di2 to get these features, thanks

[@BetterShifting]

Yes, if you have the right battery or battery mount.

[@zygmuntthecacaokakistocrat6589]

You may need the EWWU100 on 10 speed Di2.

[@timcappiello8295]

I'd say in a few years 105 will have di2 and then Sora and the claris...

[@charliethedog7579]

I don’t know about Sora and Claris but I have a feeling 105 will have it by the next generation or the one after. Pretty exciting to think about.

[@gcntech]

Let's hope! More affordable Di2 would only be a good thing.

[@zhiyuanfan5542]

I've heard people talking about the possibility of electrifying 105 and Tiagra several years ago. Sadly, I personally think that is not very likely :(

[@boowiebear]

I think 105 will be their top end mechanical as they phase out mech on Ultegra and Dura-Ace.

[@GOlone9597]

This will come in handy once Shimano release the Claris Di2.

[@setlhabanesquiremoseamo1719]

😂😂😂 Are you really gonna wait that long?

[@FuadKamal]

do you know of a way to use the hood buttons on Di2 to operate the shutter button on a GoPro camera?

[@enemigodenadie]

Giant of course 🚲

[@kennedystuart5685]

Very cool.....thanks...👍🇨🇦

[@felixkloss5667]

Nice Video!!!!

[@wasupwitdat1mofiki94]

I have a titanium frame. I installed the EW-WU111 in the seattube and don't have any issues with connecting. I would think carbon frames would have more of a problem with the communication.

[@quillaja]

"A Faraday cage or Faraday shield is an enclosure used to block electromagnetic fields. A Faraday shield may be formed by a continuous covering of conductive material, or in the case of a Faraday cage, by a mesh of such materials." en.wikipedia.org/wiki/Faraday_cage

[@wasupwitdat1mofiki94]

@@quillaja That was an interesting read. But I guess the bottom line answer then of whether or not the EW-WU111 will work is it's a crap shoot. I guess I was lucky and I didn't have to install mine so it was exposed.

[@zitherspielerjohannesschubert]

Great! Trank you!

[@piotrwojcik1756]

Wow!!!! my next bike will be with di2

[@zhiyuanfan5542]

DON'T update the firmware using bluetooth, otherwise you risk bricking the entire di2 system! Use the PC instead. If you accidently brick your di2, simply disconnect the battery for 30 second, reconnect the battery, connect the di2 to the computer and write in all the firmware that is corrupted.

[@michellokhorst5883]

sounds great, except for those of us that use Mac OS.

[@michaelsteven1090]

@@michellokhorst5883 yup agree..I have a Windows partiton on Boot Camp on my macbook pro..its worth the effort as Shimano will probably never go OS

[@solidstream13]

Di2 should come with this module

[@DrunkieCat]

Cries in tourney

[@MarkJones-bc5vx]

Thanks for making sure to mention the password (000000) for the Di2.

[@DocMAX]

Can i use them for music control (next track)?

[@neilneumann2027]

GARMIN Head unit.? Other brands are available.!

[@bensaund]

Does it put warning on your head unit if the Di2 battery is low?

[@jasond3918]

I don’t think it puts a warning up but you can set the battery % in one of the data screens that you can scroll to at times to check, if you don’t want it clogging up your main screen.

[@BetterShifting]

It does on wahoo and garmin :)

[@jimgray8423]

Yes it puts a warning up at 20%

[@gamecat1923]

Not sure why you said Wahoo head unit (#ad?), works with other brand head units as well.

[@BetterShifting]

I'd say it works even better with a Garmin to be honest (I own a Wahoo ELEMNT Bolt...)

[@ldavid2]

welcome to GCN, a channel sponsored by Wahoo

[@floridrummer88]

Their sponsorship to wahoo isnt a secret so far 🤷‍♂️ ..still not sure about the park-tool tools 😉

[@mattbritton4420]

#askgcntech Why has Shimano not made the E-tube software for apple computers?

[@BetterShifting]

GPlama has a video on running e-tube on a mac using a virtual machine, but yeah.. it sucks

[@masters40]

I'm installing Ultegra Di2 on a bike. I am installing a Shimano chain using Shimano length method. Before I cut the chain I double checked the big/big small/small combinations and I wound up with a very loose chain in the small/small combo. If I was to shorten the chain juuuust enough to give it tension, that makes the chain way too tight in the big/big combo. The fix for this would to simply not use the smallest cog in the back when on the small chainring. Apparently you can't customize the Ultegra Di2 to do this. I did some research and found this statement: "Note that Gear Position Control is not enabled on 12-speed Ultegra/105 derailleurs. If you're on 12-speed Ultegra/105, you can shift into the smallest cassette cogs when you're in the small ring. There is no way to change this setting." Any input on this would be greatly appreciated!

[@DavidS-tp7ph]

Thanks for this very useful video ! Personally no favorite feature : I find them all very useful.

[@goodwincycles7197]

Is the wireless unit comparable with 6770 di2 ten speed please? Thanks for your help in advance

[@KMS2468]

or the 6870 as well ?

[@BetterShifting]

Yes, and 6870 too.. BUT you will need either the BT-DN110 battery or the BM-DN100 battery mount. More on my site, of course ;))

[@goodwincycles7197]

@@BetterShifting is that the internal battery? I have the external one.

[@BetterShifting]

@@goodwincycles7197 bm-dn100 is the Bluetooth compatible mount for the external battery. Bt-dn110 is the internal battery

[@goodwincycles7197]

@@BetterShifting thanks 🙏

[@stangoodvibes]

Just bought a Di2 equipped bike. Great video! So...you can't have the buttons on top of the levers changing gear AND showing the gear position on the Wahoo at the same time? It's just one or the other? What about the hold feature? - can you have gear changing with a click and hold to zoom in and out of your map?? TIA

[@cj4211]

I’m sure you figured this out by now, but yes you can show the gear position on any screen you want, while also being able to use the top buttons

[@stangoodvibes]

@@cj4211 thanks CJ. I haven't had chance to play around with it yet as still haven't bought a computer and there is a bit of a shortage in Australia of the connector to link it

[@zygmuntthecacaokakistocrat6589]

Updating the firmware via BLE connection is fraught with danger: It will hang up on random occasions and in the worst case scenario brick the component you are trying to update the firmware of. The only safe (and reasonably convenient) method is to use your charger via the charge port to run the E Tube software from a Windows machine (no other OS is supported), or if you're a tech nerd, get the SME02 module for component-by-component diagnosis and repair via a Windows machine.

[@matthewblue7839]

Doesn’t work with mac ?

[@frankkeijzer7660]

@@matthewblue7839 It does work with the E-tube app on a iPhone. I just did on two bikes with GRX 815 en EW-WU111

[@kevinspiteri9590]

Great video, I installed the Bluetooth unit inside my seat post however having issues pairing to app when I depress the junction box the lights to not flash for ready to pair mode, any advise on what’s going wrong thank you

[@Aero-Guero]

does the zoom/in, zoom/out only work on the wahoo head unit?

[@involuntarysoul3867]

firmware update over Bluetooth is a surefire way to brick your system

[@zygmuntthecacaokakistocrat6589]

Yep: seen it done. Sometimes you can recover the component with an SME02 overwrite of the firmware via the component diagnosis screen, & be very careful if you're trying to do it on 10 speed Di2.

[@kpizzle1985]

Modern day Russian roulette

[@jediavatar]

So I have a 2013 Felt f2x cross bike that I use as a road bike (It was a great deal, don’t judge me 🙂). Does this work with all iterations of di2, or is it only for newer versions?

[@BetterShifting]

All except 7970. Need bt-dn110 / bm-dn100 battery or mount though

[@jediavatar]

@@BetterShifting so with some searching, it looks like I have the Ultegra 6770 10-speed groupset, so that should mean I can use the Bluetooth with this. Thanks!

[@BetterShifting]

@@jediavatar yeah - keep in mind that you'll probably have an external battery mount SM-BMR1 or SM-BMR2. Only the newer BM-DN100 mount is compatible with the wireless module (is an easy swap, looks exactly the same)

[@jediavatar]

@@BetterShifting Yes, I have the externally mounted battery. So you’re saying I would have to change the battery over to the internal version otherwise this module won’t work at all? (Honestly it makes me wonder if the added functionality is worth the cost at this point)

[@BetterShifting]

@@jediavatar no, but you do need the newer mount for the external battery. Would cost about the same though. The module is a nice to have but not essential. An alternative is the SM-EWW01. This only does ANT, no BluetoothLE. This means it won't connect to the phone, but will connect to a garmin/wahoo/other head unit

[@TheClutchVOD]

Everything I can find online says this is only compatible with the DN110 battery, but with is it still compatible with the new dn300 batteries?

[@41istair]

0:38 "...While the name sounds quite complicated..." So how many primary school kids are running around with $1,600 Di2 kit on their BMX.

[@Boise_guy123]

Does sram etap have any cool features like this?

[@danielsouth2373]

I do a lot of mixed riding, gravel/road on a Cube Nuroad (105), I need to upgrade some components quite soon and thinking of di2, my question is should I stay mechanical or would di2 work for mixed riding?

[@mariosimas]

and you still have one more function on the top buttons. press 2 times the button. in my case with a Garmin 830 i use it to go back on the pages

[@johnstephenson2113]

Great video......but how do I fix my Di2 now that it has gone compeltely black after updating firmware. This is apparently a common problem??

[@LuciTulcea]

The goldy lock is Ultegra front mech and cassette. Everything else 105 and that's it.

[@barrygreen649]

How long will the battery last? Will it last six hours, throughout a Century ride?

[@bevevans8492]

Not every one needs to spend 20 quid on a 6 inch cable, I've got a cannondale supersix and inside the save stem is a jc 200 connector which looks just like the Bluetooth unit. I'm quite sure the Bluetooth unit will fit in place of the connector. I bet the there are more bikes with integrated cables are the same

[@goofyridersshop]

can you have only buttons for shifting without levers ? I guess they are called satellite buttons? or climbing buttons..

[@alanoconnor3170]

#askgntech is that bluetooth compatible with the old 10 speed di2? thanks

[@GregaJuvancic]

Dear GCN - These are no hacks, all of this is just basic Di2 stuff. And only about half of its functionality. Theres a bunch of stuff U missed/didnt mention. (turning on/off/pausing rides, timing laps, turning on/off lights, quick shifting by 2-3 cogs or whole range, changing shifting speed, adjusting derauliers etc ) U failed to mention that most of this stuff is only available on new Di2 groupsets (such as BT connection module, buttons on top of hoods...) and the older ones need a significant upgrade for most of the newer stuff to work. Also when upgrading firmware, always upgrade only one component at a time as if doing many at once it often fails and system restart is needed if this happens (disconnect battery for about a minute).

[@455LT1]

Thanks for making me want to blow my money on Di2 even more. 🤦🏾‍♂️

[@Williamgillan-y5v]

Can I do all that on my canyon endurace cf8 bike

[@itaybruck9671]

Does it work with Garmin fenix watches too?

[@Apex820]

Is there an (IN and OUT) on the module itself or both the same?

[@grimp53]

Just needs to be inserted in a line, the direction doesn't matter.

[@rdeepakbabu]

I am unable to find the app. Is the app disconnected??

[@ribeirofrancisco2913]

Hi. I can put the Wu111 in the mtb with sistem xt di2 2x11v?

[@sionark]

Does this work with all shimano di2

[@BetterShifting]

Yes, as long as you have the bt-dn110 battery or bm-dn100 external battery mount :). (Won't work on 7970, different plug)

[@sionark]

@@BetterShifting ok great thanks

[@SuperDodoe]

Is it true if the DI2 is fully wired you would consume less battery power.?

[@buyung94]

Still watching this eventho for now i can't afford any 11speed groupset, hopefully someday I'll be able to purchase one with di2

[@scottschaus4619]

What brand and style bar tape on your Orbea, please?

[@jediavatar]

I have that exact tape on my bike, I was so excited! It is Deda Elementi Presa Black/Orange, and I love it.

[@scottschaus4619]

Thanks!!

[@NLBike79]

Is the EW-WU111 D-Fly work whit grx di2?

[@kuya.martin7805]

Hi, where i buy a module for di2

[@matthewblue7839]

Which headunit are you using: why ?:) be good to have a video about HU’s for Shimano di2: hint, hint ! !

[@sfetriathlon2432]

*Super*

[@morapelimokokomali7907]

#AskGCNTech will it also work for my Edge 1040?

[@jonmc7583]

@gcntech does anyone know the model number of the short di2 cable? Thanks!

[@MrJturner74]

So can you hack a opponents shifter??

[@markallenbarrameda403]

Hi GCN, can i use an ultegra di2 shifters to a grx di2 rd and a grx 600 calipers? #gcntech

[@bobstigler]

...next: remote tire inflation/deflation

[@DavidWilliams-nh2nr]

I would seriously advise against updating the Bluetooth module with the app. If it fails, which it did with mine, it bricks the system. Visit to LBS required.

[@itscliffvtr]

Just connect di2 with the charger cable to a laptop and run the e-tube software on the laptop

[@troiwhalen7961]

#askgcntech i need clarification, using the hidden buttons on the hoods can i set them up to change gears AND scroll through my wahoo element, or can they only be set up to be used for one purpose? thx Troi

[@paulbartlett1231]

Each button (left/right) has three functions that you can select i.e. three different ways to press that operate a different function that you have previously selected. The functions are available according to the specific head unit so Wahoo will be different than Garmin etc. in fact the Garmin head units have different functions available depending on their software that relates to the series; 800, 810, 820, 830, 840.

[@fonzy2005]

I'd like to ask if it's okay to use 28c tyres on a 25mm width rim? Will it run smoothly? Thank you in advance ☺ #AskGCNTech

[@mazerickd]

I've always been told there's a 20% rule. I can't remember where I heard it but it makes sense

[@SuperNeilB]

www.wtb.com/pages/tire-rim-fit-chart would suggest not.....

[@christerohlsson9034]

What are he talking about most of the things he talked about you can do without the unit

[@jackoelmannperez]

If I wanted to run campagnolo 12 speed shifters but I only wanted to run a 11speed cassette would I be better off with a 11 speed derailleur or a 12 derailleur? Also what brand shimano or campag? Ideally I'd run a shimano 11 speed cassette (14-30) with campagnolo shifters. What derailleur would work best? I've mixed and matched before on older groupsets and always found it fine. However I don't know if things have changed a lot. Kind regards, Jack

[@richard7059]

You can turn a 11 speed eps campagnolo shifter to run a 11 speed campagnolo derailleur on a 11 speed as a 10 or even 9 speed . It’s all in the indexing and setting of limit screws

[@Jochen-iq8vx]

Now we just take our special Shimano DI2 cable tool from Parktool 😂

[@thomasburns7755]

#AskGCNTech Is it possible to hammer Blakey's into the soles of gravel/CX shoes without ruining them? I have a beautiful pair of Northwave Ghost Pros with hardly any tread left (not that they had much in the first place). I would like to get another pair, but given that they don't have replaceable tread, and it's a lot of cash to blow on something that'll wear out in a season. Ta in advance

[@royfungames]

Why you can’t use your shifters to chance your music on your phone

[@larsborghouts8360]

Because you shouldn’t listen to music whilst riding your race bike maybe....

[@geoffwoods3653]

Can you put the bluetooth unit anywhere or does on end have to be directly connected to the battery?

[@8paolo96]

anywhere in the di2 sistem, not just stright out of the battery, how he said, it could be near the front junction box

[@geoffwoods3653]

@@8paolo96 That's great, thanks for your help.👍

[@BetterShifting]

It can be anywhere. You do not even have to connect both ends of the unit. Shimano explicitly state that it should not be installed inside the frame, but even that works just fine 99.99999999% of the cases ;-)

[@ricric9521]

Not really hacks, but a regular setup taking advantage of all options.

[@georgefouskitakis6697]

How can someone change the shifting speed via the app?