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a 9 will do but an 8 would be better
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∙ 14y ago
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What size sprocket can a 9 tooth driver fit on?
a 25 tooth sprocket will fit on a 9 tooth driver
Can you use a 25 tooth sprocket and a 8 tooth drive?
no you can not 25 with 8
What size driver fits on a 25 tooth sprocket?
9 tooth driver
Will a 25 tooth sprocket fit a 9 tooth cassette?
Yes...this is the most comon gear ratio on bmx's. this is because it allows a good balance of accelration and top speed while still giving you the clearance to be able to roll into most quarter pipes.
I need 9 tooth sprocket on my BMX bike for the back do I need a driver or can I just put a freewheel on and what do I need know about fitting it I know about the chain stuff already?
You can get a 9 tooth sprocket, you will need a conversion kit to do it. Haro makes a decent one just do a search for Haro 25/9
Will a 13tooth freewheel work with a 25 tooth sprocket?
It will work but your pedaling will be really smooth... basically it will be easy to pedal.... but you also wont get anywhere fast though plus it will look weird here are the specks for gear to gear ratioSPROCKETFREEWHEEL & CASSETTE COG orCASSETTE HUB228 cassette hub238 cassette hub259 cassette hub2810 cassette hub3011 cassette hub3312 freewheel/cog3613 freewheel/cog3914 freewheel/cog4115 freewheel4416 freewheel
If you want a 25 tooth sprocket on your bike and you have a free wheel driver do you need a new rim?
you never need a new rim its only the hub you change
When I pedal my bike doesn't move The crankset just spins as I pedal How can i fix this to make it work 100 percent again?
You must have replaced a part. Either the Driver, Sprocket, or backrim. Your ratio isn't set right. with a 16 tooth driver you have to have a 32 tooth sprocket (i think. it might be 36) with a 9 tooth driver, you have to have a 25 tooth sprocket. i don't know how many spokes you need in your rim for either one though. go to a local bike shop and ask about it. sorry i couldn't help much. i havent messed with bikes in a while.
How do you calculate sprocket rpm?
calculating sprocket RPM is very easy if you know what the RPM of the drive sprocket is. If you know that then it is a simple fraction problem. If you make the drive gear the numerator or the top part of the fraction and the driven gear the denominator or the bottom part of the fraction (DRIVE/DRIVEN) I.E. if the drive sprocket has 25 teeth and your driven sprocket has 100 teeth (25/100) that will reduce to (1/4) or a 4:1 ratio. So if your drive sprocket is spinning at 1000 RPM then your driven sprocket will be spinning at 250 RPM. You can plug your specific sprocket tooth count into that equation and come up with the right answer.
What does 25t mean when talking about a bike sprocket?
25t means that there is 25 of the little spikey teeth on the outside of the sprocket :]
Can you ride a bmx with a 12t cassette and a 25t sprocket?
yes, 28/9 gearing is very popular with riders. it provides a little more resistance than the even more popular 25/9. theres nothing wrong with that gearing at all.
Would a 25 tooth on a bmx work with a 13 tooth?
yes, but the gear ratio will be very low. when you pedal you will need to do more rotations with your legs to travel the same distance as with a 33 tooth and 13 tooth.
