AeroFix 700C double-walled aluminum wheelsets with a 50mm rim depth, front and rear. Our front and rear wheels are 36 spokes each. AeroFix wheels include high quality KT Quando hubs. Our rear wheels include flip-flop hubs with a pre-attached 16T fixed cog along with a 16T freewheel cog for single-speed riding. Includes front and rear wheel. Our wheelsets are 100% assembled.AeroFix Cycles