Spinergy Stealth Gloss Carbon PBO Wheelset. Advanced PBO fiber spokes (black or yellow) - 16 front/20 rear, All black unidirectional thermoset composite carbon construction Compact Force 10 hub, utilizes 10 driving spokes for greater torsional stiffness. Custom US made alloy freehub system with vacuum seal. CNC machined hubs, with sealed cartridge bearings for minimal rolling resistance. 45mm Stealth carbon rim. Shimano 8/9/10 or Campy 9/10 compatible. Skewers included. Only 1620g per set. Sizes: 700c. Clincher only. 650c available upon request for an additional $150.00.