Fro
New member
Thinking of running a local hill climb...like 600+ feet with 3 jumps tho so top speeds are only like 40-45ish. To be remotely competative gearing down would be a must. Any suggestions. I have stock gearing now. Would you change both or what about just the top? When would you need to switch chain length? Was thinking of a 20 up top & leave the bottom at 37???