Pure Fix 50mm Wheelset Super deep dish rims with hub width of 100mm front, 120mm rear 700C front and rear wheels with 32 spokes each 50mm rim depth; double-walled aluminum Flip-flop hubs with 16T fixed cog, along with a 16T freewheel cog for single-speed riding Includes nylon rim-strips to protect against sharp edges and prevent tube puncture