Pure fix cycles 40mm wheelsetpure fix double walled aluminium wheelsets are 700c with a 40mm rim depth front and rear and include laser etched kt quando hubs the rear wheel features a versatile flip flop hub with a pre attached 15t fixed cog along with a 16t freewheel cog for superior single speed riding pure fix wheelsets have 32 spokes and include nylon rim strips to protect against sharp edges and prevent tube puncture pure fix recommends using tyres ranging from 23x700c to 32x700c tyres