Gearing for two wheels
#1
Gearing for two wheels
I just recently acquired a second rear wheel to use for on road. I was very happy with stock 14/42 for road, and like 13/42 off road, but wouldn't mind going slightly lower.
My question is; is it possible to get the equivalent of these ratios from the rear sprockets only and use the same chain? Or will I have to switch back and forth? Idea's?
My question is; is it possible to get the equivalent of these ratios from the rear sprockets only and use the same chain? Or will I have to switch back and forth? Idea's?
#2
Try this app-you should be able to get the answers you need. Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator
#4
All you have to do is divide the rear sprocket tooth count by the front sprocket tooth count to find the ratio for the 13/42, then multiply it by the front tooth count you want, in this case 14 to find the closest sprocket tooth count. Round by rule of 1/2 or decide if you want to have a shade higher or shade lower gearing when picking.
42/13=3.23 (rounded for print, not rounded in next calculation for increased accuracy... like it makes some huge difference... just did it, that's all)
3.23*14=45.23 Use the 14/45.
So there's the "math" to know what to do.
You could consider going to a 15T countershaft sprocket if you are near enough to buying a new rear sprocket. Bigger wears better, less chain wrap and load distributed over more teeth.
42/13=3.23 (rounded for print, not rounded in next calculation for increased accuracy... like it makes some huge difference... just did it, that's all)
3.23*14=45.23 Use the 14/45.
So there's the "math" to know what to do.
You could consider going to a 15T countershaft sprocket if you are near enough to buying a new rear sprocket. Bigger wears better, less chain wrap and load distributed over more teeth.
Last edited by klx678; 06-02-2016 at 11:44 AM.
#5
if you went with a 13 front the change would be 7.1%.
Last edited by cmott426; 06-02-2016 at 06:21 PM.
#6
So now with a 42/45 rear combo, that is 3 teeth difference.
Since the chain only sits on 1/2 the sprocket, the total rear wheel difference would be 1.5 teeth.
Look at your rear wheel chain adj, can you move it forward 13/16" (1.5x5/8"pitch)?
Since the chain only sits on 1/2 the sprocket, the total rear wheel difference would be 1.5 teeth.
Look at your rear wheel chain adj, can you move it forward 13/16" (1.5x5/8"pitch)?
#7
#8
Thanks for the math, that will help. But I also don't know what will fit the rear before I have to edit the chain guide. I would like the lowest gearing possible to use the same chain and front sprocket for both.
#10
I just recently acquired a second rear wheel to use for on road. I was very happy with stock 14/42 for road, and like 13/42 off road, but wouldn't mind going slightly lower.
My question is; is it possible to get the equivalent of these ratios from the rear sprockets only and use the same chain? Or will I have to switch back and forth? Idea's?
My question is; is it possible to get the equivalent of these ratios from the rear sprockets only and use the same chain? Or will I have to switch back and forth? Idea's?