Homemade Freewheel Crank with Triple Chainrings

[@Rob337_aka_CancelProof]

What a great idea here a regular genius and you're creating exactly what I was thinking

[@StaffanPalm]

Nice idea! As a bonus, with the loud clicking from the freewheel there is no need for the old trick to put a card brushing against the spokes for nice sound effects. Sorry it did not last.

[@77vavavoom]

excellent work brother, the simplest and greatest setup i have seen yet..

[@MrBuntle]

Thankyou hutch! I have been looking for this for a long time!

[@Waterwolf28]

Thanks for responding so fast. The info. you supplied helps quit a bit, but you wouldn't happen to remember how long the bolts were that ran though the drive gear and 8 washers? Have you done an updated version of this project. Thanks for the help and keep up the good work.

[@hutchtransfer]

+Waterwolf28 I believe these bolts were 20mm in length.

[@2SUB-TV_space]

@@hutchtransfer Hi! Is it left hand thread? This freewheel doesn't work like a regular one. It should crack only when you spin it back, but here it's the other way around. Do you have a diagram? I did not understand, although I watched the video many times. Do you have telegram or something else for contacts? Thanks advance!

[@prisnrev5265]

That's what i'm looking for, brilliant trick of Diy freewheel crank, thanks for sharing

[@hutchtransfer]

If you cannot get it to work then try this: www.cyclone-tw.com/product/9/data/13

[@TheRemoteMower]

If you start welding, there is no telling what you might create!!!! I started my adventures with a 100 buck wire feed welder at Harbor Freight.

[@sonbarbun111]

I'm glad to see some one has the same project like mine. But I'm sorry that this project was done 8 years ago.

[@hutchtransfer]

Yeah this ended up not holding together when I went up a hill. If I were to build this today I would have just purchased a freewheeling crank like this: www.cyclone-tw.com/product/9/data/13

[@sonbarbun111]

@@hutchtransfer You are right. I change my project after all. I put dc motor directly to rear wheel.

[@rekostarr7149]

Hey friend, thank you so much for this video. You are about to save me a lot of money and trouble. Really grateful.

[@mikethomas9544]

Thinking outside the square. Great work. 🇦🇺

[@hutchtransfer]

Thanks 👍

[@Waterwolf28]

THANKS again, I'll keep that in mind. Have a great weekend.

[@SirGrundle]

Great vid thanks! Maybe someone has a asked this but, how does the drive from your feet transfer to the back freewheel? Like it looks like the crankarm isn't connected to the chainrings. Maybe I'm missing something.

[@SEThatered]

Lovely. I need something like that, but for a slightly different reason.

[@Waterwolf28]

This is a 2 part question. 1: What size of washer did you use and how thick were they? 2: When you cut off the chain-ring mounting bracket did you have to drill the holes and if so what size of bit did you use?

[@hutchtransfer]

+Waterwolf28 I have not had this set up for a few years, so I do not know exact dimensions. The washers I purchased had the same diameter as the holes on the chainring. These washers I picked up from the hardware store and have a uniform thickness. My guess is that they were close to 1mm in thickness. The small black brackets you see in the video were already drilled since they originally fit the chainring and the threading was already in place.

[@wordreet]

This is good stuff man! You need "sleeve bolts" for the smallest chainring, and really some sleeve tubes made up on a lathe instead of that stack of washers. But at least you were able to make it work with basic bits and pieces. Good job.

[@scottrocks1993]

I see sprocket to sprocket is lined up nice and straight. But when you tighten it up. It's not going to be lined up anymore. Will drop a good few mm. Did you put more spaces on to fix it. Just wondering because looks like. You don't have much room left on pedal arm.

[@coburnlowman]

This is a good idea. I read the comment that it failed but it just needed some machined blocks maybe from some 6061 aluminum to make it solid. I do have a question being that you seem to be skilled in building motor bikes. Has anyone used at least a #40 - #41 chain n sprockets ? I ask because I'm a good sized feller who is 6ft + and 200+ lbs and have stripped several bike sprockets just by peddling up hill. My goal before spring is to build a 99cc or 212cc predator with maybe a 3 speed drive the way you have done here. I'll belt clutch a step shaft to drive the peddle sprocket but already know that a regular bicycle chain will strip out.

[@hutchtransfer]

Yes some aluminum would have been better. Back when I created this video no one had offered chainwheel sets. Now there are some places that sell a double chainring freewheeling crank. Here is one: www.cyclone-tw.com/order-chainwheel.htm If this was available before I definitely would have purchased it instead of making one. I had one of those cheap bolt on motor kits and I did recall using the #40 chain. The chain outlasted the motor! I have not used that for the electric bike.

[@Waterwolf28]

I was having problems understand this type of setup until I saw your video, Thanks for the help. Could you please explain why you used a 56t sprocket instead of say a 44t, more power or speed and what where the bolt sizes and length did you use to put it all together.

[@Rob337_aka_CancelProof]

I wonder could you share links disease things you used to make this with because I can't do anything with them myself with my inadequate toolkit of a couple screwdrivers and a pair of pliers but I'm hoping to enlist the help of somebody like you to do the parts that I can't because I desperately need to get this done and get back to work

[@Thrashaero]

chains wont hit each other if you have this same setup for left crankarm (and freewheel hub for left hand), which can also eliminate jackshaft junk for gas motors that have left side motor sprockets.

[@jlh1834]

Parabens magnififica ideia, OTIMO PROJETO, nao de ouvido aos comentarios absurdos , sempre virao em torno de algo belo, um abraço do QUERIDO BRASIL

[@robertmiller8578]

I like this setup and am wondering if it will work with a mid mount e-bike motor with a bolt on jackshaft for a gas engine to make a hybrid bike? Can you let me know if this would work

[@billbill1605]

great video... I'd like to see the second video where is it?thanks

[@hutchtransfer]

+Bill Barter Unfortunately I never made the second video. However you can watch the video Homemade BB Drive Electric Bicycle and this will have a similar drive system working.

[@tonye.5661]

Your videos were great! I have to commend you on your effort and the genius way to create a self powered E-bike compared to those other videos on here that are a waste of time. Can you tell me how much it cost you to buy everything including the batteries and controller and so forth. Complete how much? Thanks

[@jessefowler2733]

Thanks for this!

[@robertmiller8578]

Btw I would love to see a video of this in use with the type of setup that I was asking about because if possible I would like to make one my self as I am an avid diyer and outdoors man it would be very useful to get to where I hunt and use a small trailor to haul game and hunting equipment to and from the woods also for going to the store, ect. So I can really use the information.

[@hutchtransfer]

Building one can be complicated. However, they sell shift kits to go with gas motors: sickbikeparts.com/shift-kit-and-all-drive-products/ Here is a great explanation of how it works: kzbin.info/www/bejne/mmqYfYewl6t_edk

[@BK42Cycles]

Very creative! Thanks for sharing it with us! Btw nice channel

[@Waterwolf28]

Thanks for yor quick reply. That will help me alot. So if I understand you right, by going to a smaller sprocket I'll gain speed, but lose power for climbing hills. I'm planning on using 24 inch rim & tire combination which would give me more hill climbing power. So how do you think your setup would work with the smaller rim & tire.

[@sparkles9868]

Brilliant just what ive been looking for to solve a problem i have

[@tonye.5661]

Wow pricey so what is the advantage because I saw a front wheel E-bike conversion kit on Ebay 48v 1000w for under $200 includes wheel with motor attached with spokes and controller and throttle and so forth but does not include the battery.

[@TheFarleyGordon]

I really like what you have done with your mid drive system.. how has the 250 watt motor worked out and do you know where you can get a 500 or 750 watt motor to use as a mid Drive the same that you did. I really like the commercial Baufung mid Drive kit which includes battery for about $1,200 but I don't want to spend that if I can do something similar that you have done

[@hutchtransfer]

My motor is currently 450W, and so far this one has worked well. The ability to change gears really helps this motor. The max speed is about 20mph, which is fine with me. As far as more powerful kits, you should check out: www.cyclone-tw.com/

[@bigangeldom]

Nice job!

[@aaroncarroll7516]

that is what gonna do for my motorized bike thanks that is simple was looking for a way to do it.

[@hutchtransfer]

Instead of making one you can also order one here: www.cyclone-tw.com/order-chainwheel.htm

[@DominickFeragola]

Nice job. Thanks for the great video

[@mikebaird3867]

Hey awesome setup, so I understand the crank has a freewheel built in on the right side with all the chain rings so when the motor turns your your pedals stay stationary, so is there a freewheel built in the left side, I got a project right now, i converted a car alternator to brushless motor

[@hutchtransfer]

There is no freewheel in the left crank. There is only a freewheel in the cranks connected to the chain. You just need one freewheel on the cranks, and this will allow the motor to spin and keep the pedals stationary. To eliminate drag while pedaling with the motor off, I have also put a freewheel on the motor itself. This will allow the chain to freewheel so I am not spinning the motor as I pedal when the motor is turned off.

[@LektricEyeGod]

thank man this is exactly what I was looking for

[@usmanshah2842]

Brilliant Video, Helps a lot man!

[@CORRIGEEN71]

extremely clever arrangement , how did it work out ?

[@hutchtransfer]

Unfortunately the brackets bent while under a heavy load going uphill. It did not last as long as I expected.

[@MrWarrensk]

awesome video this will help a lot

[@ersenozer5520]

Good job

[@wgenerotzky]

That turned out really well for being drilled free hand :) . Where did you get that threaded crank arm?

[@hutchtransfer]

sickbikeparts.com/cranks-170mm-freewheel-crank-set/

[@Jbogator]

Where did you get crank arm with thread?

[@OstrzeUmysl]

Ya I was talking about two fro the chain drive and one for the drive. Problem is most of them are crap, not impressed with Cyclone and want something that looks good, Looking at GNG kit right now but would like to build my own possibly using parts from sickbikeparts..., I want high quality and buy the time you get the parts from china your better off getting local parts. Also thinking custom high end builds. . Read a few posts with the crank threads stripping on GNG kits

[@OstrzeUmysl]

Hi I am thinking of buying a GNG kit but also thinking of a converted hub drive mid drive conversion so wondering if it is possible to build a triple free wheel crank off the shelf with quality products, doing research and kinda thinking of doing custom DIY mid drives in the future as a hobby.

[@dericnichols6804]

Good video my friend...

[@daVidFonda]

Great job. thanks for the advice

[@random_32114]

can you do an update video?

[@tuliosantiago661]

Is it possible to use this combination you made in your eletric bike, but instead of this eletric system i use similar to the sbp shift kit? well, the truth is: i live in Brazil , would be hell of expensive to import the sbp shift kit. (or any other kit of the kind) i have a 2 stroke engine kit on my bike and was planning to make a homemade shift kit, also using this Crank ideas of yours.

[@hutchtransfer]

Túlio Santiago In theory it could work, however you would need to know the rpm of the engine shaft. You would need a way to reduce the motor rpm to 100 rpm at the pedals. You would need to modify your crankshaft to accept a gear. This could mean you need to do a couple of reductions. Then you would need to purchase a freewheel and freewheel cranks. I do not recommend using the homemade triple chainring crank I made in the video you watched. The motor would most likely rip this apart. You should watch my other bike videos for updates on the crank system. That could work out better for you.

[@shivalih]

Do you have the video of removing the original sprocket from the motor? Would appreciate if you can please share the steps to remove the sprocket from the motor.

[@hutchtransfer]

Unfortunately I do not a video for that. If I recall, the nut on the original motor is reverse threaded. I used a set of pliers to hold the gear and then I used a ratchet to loosen the nut on the motor shaft.

[@ThaGoatPMarshin]

Hey there I really like your video. It was very helpful. But I was wondering is there a way can I pay you to make me one?

[@hutchtransfer]

It would be much cheaper and less hassle to buy a pre-made mid-drive kit. Had these been available several years ago, I probably would have purchased one of them instead of building mine. The one I built always needs fine tuning since is was a custom job, and I know a kit would be much more reliable. Here are two kits that use a 450 motor similar to what I used: www.gngebike.com/gng-2019-450re www.amazon.com/Electric-Mountain-Mid-Drive-Conversion-Bike/dp/B01CL2NWUY

[@ThaGoatPMarshin]

Thank you so much

[@99dynasty]

Nice concept! I want to replicate this. Ecospeed has a freewheel kit that could have worked for you.. Did you ever consider using that instead?

[@bobcatt2294]

Many of these mid drive systems are noisy because of the small sprocket and chain. Could you demonstrate the noise level?

[@hutchtransfer]

You can go to this video on my channel: Homemade BB Drive Mid Drive Electric Bicycle Update At the end I have the system running so you can hear the sound. The freewheeling sprocket in the above video is different than the one in this video, however it will give you a good idea on the noise level. Actually most of the noise is not from the chain, but from the motor itself. The freewheel also contributes to noise.

[@bobcatt2294]

***** Thank you for the response, I wanted to hear the motor and gears under stress while actually riding.

[@hutchtransfer]

I ride the bike at the end of this video: Homemade BB Drive Electric Bicycle

[@pachy444]

Hmmm. . Right at the beginning there when you didn't drill the holes accurately I was disappointed. Surely you could've spent an extra 20mins & a simple home made jig to get them accurate. Even with a hand drill you can drill them small & file to correct them. Anyway keep up the good work.

[@hutchtransfer]

Unfortunately at the time I built this I did not have the skills necessary to build a jig and do it correctly. However performance was not effected. I did not have any problems with the chain falling off. I actually do not use this particular set up anymore. Check out the latest video for my bicycle on my channel. You will see that I redesigned the freewheel crank.

[@christo930]

Where did you get the special crank arm? What would be a good source for the small motor that will drive this? Where did you get the motor from?

[@AshwinAshwinRamdas]

so since you have a freewheel, does that mean you can no longer use the pedals to move the bike?

[@hutchtransfer]

That's right. The motor will spin the gears but the pedals remain stationary.

[@TheIceychill2]

Interesting, are you the same person as cryptopyro here on KZbin who also made a triple chain wheel?

[@chikenpaww]

Thank this is what I need to do diy ebike

[@kookoohead420]

now that was bad ass! fucking sick! got a part 2?

[@jorge52818]

Tankyou

[@seaspring670]

great idea !

[@tonye.5661]

Okay so what is the maximum speed I can achieve on flat road? I am looking for at least 28 MPH. Thanks

[@usmanshah2842]

the freewheel doesnt rotate in the backward position right??

[@ralphinator2]

Very nice! Does anybody sell a pre-made set like this?

[@hutchtransfer]

ralphinator2 Not exactly like this one, however you might check out this site: www.gngebike.com/mid-drive-kits

[@pachy444]

I wasn't suggesting the chain would fall off. It's just it seemed a very basic thing to get wrong whereas in other areas you have obvious skills. I will check your other vids, i'm not usually critical of people but I was shouting at the video when you didn't drill that thing accurate hahaha

[@magnunstalinbarbosadecarva9372]

hi man, please tell me the exact name or where can i buy this freewheel that is adapted in the middle of the crown? I didn't find it on the website mentioned in the description thanks so very much.

[@hutchtransfer]

sickbikeparts.com/front-freewheel-heavy-duty/

[@vespass2]

thank you very much ,learned alot

[@taylorv817]

How many mm is that crank arm and where did you buy that threaded crank arm?

[@nigellyttleton]

What happens if you get your trousers/pants caught in the drive sprocket ? Is it gonna rip your leg off? Like you see on those lathe accident videos

[@hutchtransfer]

Luckily this has not happened to me since I roll up my pant legs or use a rubber band to hold the pant legs. I imagine you would lose your pant legs first instead of your leg unless those are really well made jeans! :)

[@nigellyttleton]

hutchtransfer Hi yes its best to be cautious at least fill in all the medical details on your iPhone and any hospital locations in the area pre programmed in you sat nav aswell. Just. Because that outer drive sprocket is still powered when you stop pedalling and could possibly wrap your foot around the crank and I like my limbs pointing in the right direction. Maybe you should watch a lathe video as it can just snag your shirt sleeve then twists into a cord then rips your arm from its socket, but here you have the added bonus of you trousers millimetres away from danger. It's not for me I will pass on this one due to sanity prevailing.

[@hutchtransfer]

I have thought about getting a custom chain guard to protect everything.

[@vali4o]

Where did u get those little brackets for the 22t ring ?? and what material are they from ?

[@hutchtransfer]

vali4o I took a regular triple crankset and I cut those little black brackets off. You can find a triple crankset that has removable chainrings. The brackets that hold the granny gear are the ones you want. Unfortunately this is not the best design because those black brackets eventually broke under heavy load up a hill. If you view the latest electric bicycle video on my channel I show a different triple chainring that is easier to build and is stronger.

[@99dynasty]

How is the drive chain and 56t sprocket holding up to wear and tear?

[@λάδα]

Given the rear wheel already has a freewheel, by making the drive sprocket freewheel-enabled, how is efficiency achieved?

[@hutchtransfer]

A freewheel on the drive sprocket allows the motor to run the sprockets while leaving the pedals stationary. If you did not have the freewheel then the pedals would always be spinning whenever the motor is running.

[@λάδα]

***** Thanks for enlightening, master.

[@LimitlessFantasyUnleashed]

that mean do you have 3 freewheels one for the motor chain link and cassette? thank you i need help

[@hutchtransfer]

One freewheel on the motor, and one on the cranks. Two total.

[@LimitlessFantasyUnleashed]

thanks man !

[@nicolaspena1721]

lo que le pones en el sentro es un espro y el braso le hisiste cuerda mu pudes contestar la pregunta gracias

Hello hutchtransfer, can you tell me what type of bottom bracket are you using? i am building one but there is no space for the triple chainrings. Im using a 153mm bottom bracket. Can you help me?

[@hutchtransfer]

PALAKAS Bambú My bottom bracket is 206mm. It was purchased at Sick Bike Parts, however I do not see that part listed anymore on their site.

Thanks for the answer, you are right, there is not the 206mm in the SBP site, i am going to search for another place. i was using a 153mm BB :( Saludos!

[@georgepaganis7943]

Were can you buy the crank arm with the thread

[@hutchtransfer]

sickbikeparts.com/cranks-170mm-freewheel-crank-set/

[@OstrzeUmysl]

What I men't off the shelf, not grinding or drilling just get the parts and assemble.

[@99dynasty]

Where did you purchase the triplechainring set?

[@TomasDenizaerd]

buen video mui claro y consiso sensillo de hacer gracias

[@xxnotmuchxx]

which store or online would sell pieces to change bike pedals to freewheel?

[@hutchtransfer]

www.cyclone-tw.com/Parts.html

[@Cyclonebikeco]

buy the complete freewheel chainwheel crank set is cheaper and easier

[@tutasloko]

can make a tutorial of zero , because I'm from Venezuela and is hard to get something and import is way too expensive

[@danhardy410]

can i buy one thats like this but not homemade and if so where can i get it

[@hutchtransfer]

You can purchase a freewheeling crankset with double chainrings at the Cyclone Electric Bike Taiwan site: www.cyclone-tw.com/order-chainwheel.htm

[@bstvines2567]

where i can bye this crank wheel in india?? please suggest mi???

[@hutchtransfer]

I don't live in India so I have no idea where you would buy this there. However you can purchase something similar online: www.cyclone-tw.com/order-chainwheel.htm

[@samapathkumarvarma2450]

where did u get the 56 tooth drive sprocket

[@hutchtransfer]

+Samapath kumar varma You can find it here: www.kingsmotorbikes.com/collections/all-bicyle-engine-parts/products/56-tooth-chain-sprocket?variant=12660296388 You can also search for them on Ebay.

[@bstvines2567]

tell me more about this.... please

[@hutchtransfer]

This design did not hold up under a larger load, so buying something pre-made would be better. The website www.cyclone-tw.com/order-chainwheel.htm sells something similar.

[@alextrezvy6889]

01:20: Sick bike parts?

[@hutchtransfer]

Sick Bike Parts is the name of the online store I purchased the freewheel.

[@alextrezvy6889]

LOL! The more stupid choice for a name is hard to invent!

[@contractkilla6587]

👍👍👍☝️

[@alextrezvy6889]

Where did you get the freewheel?

[@hutchtransfer]

sickbikeparts.com/front-freewheel-heavy-duty/

[@akwan9701]

where did you get your crank with threads ??

[@Mike_Greene]

pay attention

[@dennishurtjr158]

I say it's a fail considering that big gear is supposed to spin free from the others

[@ahmadinsanally]

thats not true, if the big sprocket spun on its own how will power reach the rear wheel? You need an input (big sprocket) and output sprocket which rotates with it to transfer the power to the second chain

[@fatherthyme4587]

If I'm off a couple thousands, I say, "Good enough for government work."

[@bobcatt2294]

Any updates on your work?

[@hutchtransfer]

No updates on my bicycle. This particular homemade freewheeling crank did fail under heavy load up a steep hill. My latest bike video from a few years ago shows how I redesigned the freewheeling system by using triple chainrings from an old bike.

[@bobcatt2294]

Are you saying this particular setup failed?

[@hutchtransfer]

Yes that particular setup did fail under a heavy load going uphill. It seems I pushed it too hard.

[@sirlds]

exelente

[@daddz2]

buy all this from cyclone built for about the same cost

[@Rob337_aka_CancelProof]

Would you be interested in selling one for a reasonable price? I don't need a triple I just need two change rings with a space where the middle one was leaving me with one for my existing chain on the outside that goes to the back derailleur like normal and then another one on the inside for the short chain coming from a DC motor located in the bottom of the triangle for a DIY mid-drive on the cheap not because I'm a cheapskate but because I'm unemployed and this will be my primary mode of transportation for now until I can find a decent job and save up enough money for a car that doesn't force me to deal with ghost pedaling and allows me to Leverage all the benefits of the so I can get the most bang for my buck out of this little Walmart hoverboard motor I have that I am misappropriating specifically for that purpose which as I see it is by far my best option for an affordable conversion of my cruiser hybrid to make it as efficient as possible considering I'll be using old 18650's from obsolete laptop batteries as my power source which leaves a lot to be desired but is barely within my means as it is assuming I can get it done as I simply don't have the materials or tools necessary to fabricate this part

[@MrUnder30seconds]

mate! if you can make these, id buy one, i need one, but dont charge four hundred for it ffs

[@hutchtransfer]

MrUnder30seconds Unfortunately the one I build fell apart when going up a steep hill. The small mounts got twisted. If you are looking to purchase an affordable one, check out this site: www.cyclone-tw.com/order-chainwheel.htm

[@MR57HEAVEN]

Hi. Meaning no disrespect, but all of these extra gear ratios are totally unnecessary. You have 8-10 gears on the cassette. With 3 extra sprockets on the chainring, that makes a possible combination of 24-30 gear ratios. With almost any bicycle engine, from the China Girl mid-frame engine to the GP460 or Tanaka 47R engine, 8 gears is more than enough. It'd be like driving a car with 8 forward gears. And YOU want to drive with 24 forward gears? Really? I've run both the 460 and the Tanaka engines for over five years on crowded streets and highways. Guess how many gears these engines like, for street driving? They like FOUR GEARS!!! First gear to crawl on sidewalks at walking speed, third gear at Olympic runner speed, and 5th gear to jump into traffic at 30mph-up. And one thing ALL!! 2-stroke engines like is SUPER LOW GEARING to start off at the bottom of a steep hill or a dirt berm. I run a 10-tooth engine sprocket connected to a 72-tooth chainring sprocket(T8F/smaller chain= 7" chainring sprocket). The engine has a 5:1 reduction tranny, so that's (72/10)X5=36:1 ratio. Then I use a 24-tooth driving chainring and a Shimano 11t-34t 8-speed cassette. So 36:1 x (34/24)=51:1 first gear! That's like having a 123-tooth giant rear wheel sprocket! So as not to bore you with 8 gear ratios, here are the other 4 gears that 2-stroke bicycle engines might like: 3rd gear on the cassette is 34.5:1(like an 83-tooth rear sprocket. 5th gear is 25.5:1(like a 61-tooth rear sprocket. 7th gear is 19.5:1(like a 47-tooth sprocket). If it's flat ground, I might use 8th gear, which is 16.5:1(like a 40-tooth rear sprocket). If I use the first 4 gears in a row, my engine says "Come on! Shift wide-ratio, not close-ratio!"Okay, let's try to figure out what your gear ratios would be like on a bicycle with a China Girl engine. Let's gear it very low on the engine and jackshaft, to give you a fighting chance of attaining ho-hum gearing to absolutely un-usable gear ratios. The China Girl engine has a built-in gear ratio of about 4.15:1. Take a 10-tooth engine sprocket and chain it to a 17-tooth left-side jackshaft. So 4.15 x (17/10)=7.06:1gear ratio. On the right-side of the jackshaft, place a 9-tooth sprocket. Chain it to the 48-tooth chainring. So 7.06 x (48/9)=37.65:1. Connect the 34t rear cassette to the 24-tooth chainring. So 37.65x(34/24)=53.34:1! That's like having a huge 129-tooth rear wheel sprocket. Really low. To be fair, this is even lower than my setup. 8th gear is 17.26:1(like a 42-tooth rear sprocket). A 2-stroker would love this combination.Too low and need more speed? Ok, shift to 36-tooth chainring. First gear is now 35.56:1(like a 86-tooth wheel sprocket and 8th gear is 11.5:1(like a 28-tooth sprocket. Unusable for 2-stroke engines). 7th gear is 13.6(like a 33-tooth in-usable sprocket). 6th gear is 15.69:1(like a 38-tooth rear sprocket).Need high speed? Can your engine pull these high gears or fall flat? Switch to the 42-tooth chainring. First gear is now 30.48:1(like a73-tooth rear sprocket). 8th gear is now 9.86:1(like an un-usable 24-tooth rear sprocket.7th gear is 11.65:1(like an unusable 28-tooth rear sprocket. 6th gear is 13.45:1(like an unusable 32-tooth sprocket).So, with 24 possible gear combinations, which do you choose? If I was FORCED to use multiple chainrings, I'd run the 24-tooth chainring. 8th gear would be 17.26:1, which is fine. However, if my engine had the power to reach 50mph, I'd switch to the 36-tooth chainring. I'd do this for the sole purpose of using 6th gear, which is 13.45:1(like a 32-tooth sprocket. For further comparisons, let's use stats from a gear ratio calculator:to be continued while I retrieve the gear calculator link.....Read more Show less Reply 1 Edit Delete myron yamashita1 second agoOkay, 8th gear at 16.5:1: a China Girl spinning 9,000rpm would reach 42mph. A Tanaka engine at 10,000rpm would hit 47mph. A GP460 engine at 11,000rpm would turn 52mph. So my whole point is that you don't need more than 4 gears.....8 speeds at the most. Choose your sprockets wisely for super low gears on 2-stroke engines. If not, you'll be riding a dog.Read more Show less Reply 1

[@rekostarr7149]

... bruh

[@hutchtransfer]

Yes I realize that some of the middle gears are unnecessary, but I built this with parts I had available at the time. I wanted a granny gear so this motor would do well on hills, however I also wanted larger gears so that it would reach 20 or more on the flats. Therefore the middle gears are not used as often. Plus you realize I have an electric 450W motor and not gas. Because this motor is not that strong, extra gearing is needed for hills. If I had a gas powered kit then I agree that all of my gears would not be necessary.

[@deormanrobey892]

When your little electric motor or hot battery takes a dump, gears will be quite convenient.

[@deormanrobey892]

I don't doubt it, but sometimes even good stuff goes south. Perhaps it would've been better to say "if" instead of "when".

[@giuliopilotta4321]

hello I am from Italy, I would buy this item, could you help me? send in Italy or know a site to buy?

[@hutchtransfer]

Unfortunately I am no longer using this one and I do not make or sell them. However there are some sites that sell a freewheel crankset with two chainrings. Here is one: www.cyclone-tw.com/order-chainwheel.htm

[@segerwaras6101]

Im buy

[@johnjayflores1338]

.

[@GDMHificationranpitc]

Update¿

[@hutchtransfer]

Sorry no update on this.

[@GDMHificationranpitc]

@@hutchtransfer that means it worked... I think... want to sell it?

[@hutchtransfer]

@@GDMHificationranpitc Unfortunately it did not work. It broke under an extreme load going uphill. However, they do sell something similar if you look here: www.cyclone-tw.com/Parts.html

[@GDMHificationranpitc]

@@hutchtransfer thanks, I could see that happening those bolts would be under a lot of stress. One man's trash is another man's treasure still :-)