Designed for speed and style, with an extra dash of speed, these Pure Fix Cycles double-walled aluminum wheelsets are size 700C with a lighter, 30mm rim depth, front and rear. The 30mm wheels include name-brand and laser-etched 120mm KT Quando hubs with a sealed bearing for an all-around faster ride. These wheels also feature machined walls for high performance braking. Rear wheels include flip-flop hubs with a pre-attached 16T fixed cog, along with a 16T freewheel cog for single-speed riding. Front and rear wheels have 32 spokes each and all wheelsets include nylon rim-strips to protect against sharp edges and prevent tube puncture. Recommended tire range: 23 by 700C to 32 by 700C (tires and tubes not included).