Pure Fix Cycles Fixed Gear Freestyle Wheel Set, 26-Inch Flip-flop hubs with pre-attached 16T fixed cog and 16T freewheel cog for single-speed riding 26-inch wheel-sets feature triple-walled aluminum construct Name-brand, laser-etched, sealed, high flange hubs Front and rear wheels have 36 spokes each; includes nylon rim strips to protect against tube puncture Weight: 4 lbs. per wheel Flip-flop hubs with pre-attached 16T fixed cog and 16T freewheel cog for single-speed riding