24 inch tire

C

cimel

New Member
I have a 24 in tire and am going to get pirate cycles adapter and 40t sprocket. Is that a good ratio with a 24 in tire?
 
40T with 24 is basically like 44T with a 26. It's a decent all-around ratio, but don't expect to cruise at 30+ with it. 20-25MPH should cruise nice tho.
 
with a 24, it'll rev up faster. less rolling resistance. if you're a lightweight rider, you can go smaller on the sprocket. a 36 would work nicely.

depends on if you want top speed or faster starts.
 
I run a 42t rear sprocket with a 24" rear tire and it just flies! Pretty good take-offs and tops out around 56mph.....

.wee.
 
Damn scotto,what kinda engine you got in that thing,a deisel?


I have the same question as the OP.

I have a huasheng 49cc with the 80/10 4G transmission. What's the smallest I could go on the sprocket with 24 inch wheels?


I don't care too much about take-offs. I've been riding single speed bmxers for 20+ years. My latest has a 52t chainring with a 16t rear sprocket. I can top it out around 40mph and I take off from a dead stop sitting down. If you ride wiithout a motor then you should be able to appreciate that.
 
d_gizzle said:
Damn scotto,what kinda engine you got in that thing,a deisel?
Click to expand...

He has a Pred 212 and AGK tranny, has nothing to do with the OP's setup

I have the same question as the OP.

I have a huasheng 49cc with the 80/10 4G transmission. What's the smallest I could go on the sprocket with 24 inch wheels?
Click to expand...

40T gets you ~31.5MPH @ 7K, 36T gets you 35, 32T gets you to almost 40. I recommend a 36T.
 
Why are you recommending the 36t? Is that ratio(14.4:1) all this motor can handle? I can switch up the pedal side to help with takeoffs and hills.
 
d_gizzle said:
Why are you recommending the 36t? Is that ratio(14.4:1) all this motor can handle? I can switch up the pedal side to help with takeoffs and hills.
Click to expand...

Because with the HP you have, having the HP peak come at 35MPH is ideal. With a 32T, the engine would be lugging below 20MPH. Your clutch wouldn't fully engage until ~15MPH. I think a 32T is too small - you'd have poor low-speed characteristics on engine power and very little hill-climbing power. Besides, the engine is capable of revving to 8K without problems. With a 36T, 8K is 40MPH. With a 32T that's 45MPH and you'd never make it there unless you went downhill or had a great tailwind.

Your 4:1 with a 36T would be the same ratio as my shifter 4G in 3rd gear, it's a perfect cruising ratio, IMO. But get the sprocket you want.
 
I'm taking your advice and getting the 36. Is 15:1 the best top speed ratio?


But....what if I get a 100T freewheel pulley and a 30T?
 
15:1 is a good all-around ratio, but it probably won't net you the highest top speed.
However, it will give you an easy 20-30MPH cruise and climb hills better than 4:1 36T

You don't want to gear the thing too high or you're just gonna lug the engine at lower speeds.
It's tough to find the perfect medium with a single-speed drivetrain when you desire a high top speed.
 
I'm going to try a 44T or 40T for now. Maybe if somebody gets the new freewheel hub for the 4G I will try that with a 100T/30T setup.
 
Last edited:
Thanks for all the info, I went ahead and got a 40t with a pirate cycles adapter. Lets see what that does.
 
The_Aleman said:
He has a Pred 212 and AGK tranny, has nothing to do with the OP's setup
Click to expand...

An AGK tranny? Better have another look.......

ca5f50db.jpg


dnut
 
The_Aleman said:
I had meant to say "AGK style" but forgot to type "style" lol
Click to expand...

That my friend is an original scotto-matic tranny......don't mistake it for those cheap imitations on the market :D The only thing AGK about it is the 26t sprocket and the 5/8" adapter it's bolted to. Scotto-matic*......smooth as glass!

laff
 
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