Originally Posted by conradcliff
Here's a good question..at least I think it is..SBP's kit only uses a 17 tooth sprocket on the input side of their kit and say:
Why are their ratios so different? It seems like something is amiss.
Edit: Ohhh, I think I read somewhere that the china engines have an internal gear reduction..is that right?
When he mentions 58t sprocket and 5.8:1, you must multiply this by 4.15 internal gear reduction to calculate to 24.07:1.
Multiply 2.7 by 4.15) internal gear reduction to get 11.21:1 top speed gearing.
The ratios are so different because he is using all the gears in the cassette.
Can you see that the SPB kit has 11.21:1 final gear?