Originally Posted by Jinksy
If I change my gear ratio from 14/40 to 13/43 will I get better performance off the line? Do I need to adjust the chain length?
14/40 will give you a 2.86 ratio versus 3.31 for a 13/43 sprocket combo. You will get more acceleration and lower top speed. How much of each...I don't know but that big of a jump will be noticeable. Chain question...maybe, maybe not. Change sprockets and then try to adjust chain.