Maybe this is just me...
For Spec at a National, I am running an 80T spur and 36T to 39T pinions to give me a range of ratios between 60 and 70mm per rev.
The following day, for Mod, I need an 88T spur and am trying to get 40 to 45mm per rev for Modified. Explain to me again how I can use a 2mm range of shims to set those different gear ratios?
