I run a fixed on the streets, and there is an out door velodrome(sp?), i some times go there there just to do a few laps, but i find 69 gear inches to be way to low. The hub is a fixed/free hub.
I got a 15t cog to try a harder gear (faster).
I have a front brake, so would it ok to just screw on the 15t cog and do some laps with out a lock ring on the free side?
Thanks its a surly cog if that matters.