who.....honestly is going to give you advice??
After Thetford winter series 2 my cheeks were sore too, infact I suffered from Thetford back and also related to how a gay guy feels after a really good shafting, probably the amount of grinding up those long uphill winding sections(which incidently i never walked on) and that race probably slightly too higher geared. However at no 3 thetford, same gearing less hilly and no pain in the arse, so to speak.
With my limited singlespeed experience, it totally depends on terrain, conditions and fitness............... go geared bike and then you shouldn't go far wrong, which is why I will go with my superlight or scott scale for the last Thetford race........... oh by the way i'm riding 32-16 if that's any good to you
