Essor USA Bolt Aluminum Clincher Front/Rear Track Wheel Set, 700cm Essor USA Bolt 31mm Aluminum Track Wheel Set Front/Rear Front: 830g, 28 spokes radially laced Rear: 906g, 28 spokes laced 3-Cross, Fixed/Free hub Rim has an external width of 18.2 and an internal width of 13.6. Rim depth is 31mm Included: Rim-strips, track-nuts, locking and 16t cog