Whenever poeple talk about gearing on their bikes,and you see a combination like 7/68, that means a 7th pinion on the front, and a 68th sprocket on the back. These combinations are endlessly changeable, depending on your riding style and what you're using the bike for. For instance, a taller sprocket (more teeth) will add to acceleration, but lower top end.
Whenever poeple talk about gearing on their bikes,and you see a combination like 7/68, that means a 7th pinion on the front, and a 68th sprocket on the back. These combinations are endlessly changeable, depending on your riding style and what you're using the bike for. For instance, a taller sprocket (more teeth) will add to acceleration, but lower top end.
^Yep, and I'm going to change my rear sprocket soon, so just to make sure, every 3 teeth on the rear sprocket = 1 tooth on the front pinion correct?
^Yep, and I'm going to change my rear sprocket soon, so just to make sure, every 3 teeth on the rear sprocket = 1 tooth on the front pinion correct?
Not on a Cag, dude ..... by your formula, that would be a 6th pinion and a 18th sprocket, and I don't even think they make sprockets that small ....
Cags generally go by the "Rule of Ten." For every single tooth on the pinion, there should be ten (ish) teeth on the sprocket. 6th pinion, 60(ish)th sprocket, 7th pinion, 70(ish)th sprocket, and so on .... (Found this info on another pb site ... sounded reasonable, so I brought it over here.)
Not on a Cag, dude ..... by your formula, that would be a 6th pinion and a 18th sprocket, and I don't even think they make sprockets that small ....
Cags generally go by the "Rule of Ten." For every single tooth on the pinion, there should be ten (ish) teeth on the sprocket. 6th pinion, 60(ish)th sprocket, 7th pinion, 70(ish)th sprocket, and so on .... (Found this info on another pb site ... sounded reasonable, so I brought it over here.)
Dammit I just wasted money ordering a 64 tooth sprocket thinking that it would be almost equal to me putting a 8 tooth pinion on my bike. I heard that calculation somewhere, and I just ran with it lol. So I would have to use about a 58 tooth sprocket right?
Where did you hear that 3-to-1 calculation? That might work on a goped (actually, it kinda does - the Re-Cycle gearing is a 25th pinion on the CVT, and a 55th sprocket on the wheel .... almost 2:1 gearing).
You should be cool with a 7/62 or 7/64 ... a 58 is just a little too low for takeoffs and acceleration, although top end would be prety interesting. My race bike is running 7/68, seems to pull just fine with that range.
Where did you hear that 3-to-1 calculation? That might work on a goped (actually, it kinda does - the Re-Cycle gearing is a 25th pinion on the CVT, and a 55th sprocket on the wheel .... almost 2:1 gearing).
You should be cool with a 7/62 or 7/64 ... a 58 is just a little too low for takeoffs and acceleration, although top end would be prety interesting. My race bike is running 7/68, seems to pull just fine with that range.
Hmm I'm not exactly sure where I heard it from, but I surely heard it before, and more then once.
Here is 1 of the places that mention it: Sprockets & Speed - Pocket Bike Forum
(I hope it's not against any rules to post this link)
^Oops I just read through it all and it seems that they are talking about super pocket bikes, so I guess that's where I got all of my confusion from.
Yea I'm running 7/68 right now and my low-end is too powerful, which makes the top end feel slower then it actually is, because it gets there pretty fast in about 5 seconds.
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