Thanks for the help cavernmech and sr20det ,I was up at the shop today talking to Vertern-youth and Tayler about making the Pinarello fixed but I would have to take the campy Hub off and change the Campi crank arms to shorter ones as I am getting peddle strikes now carving corners so instead I'll keep the 42 ring and get a 16 cog instead and just make or buy a fixed gear instead