Mavic Ksyrium SR Tubular Wheelset Material: [rim] Maxtal (aluminum alloy); [hub center] carbon fiber; [hub flanges] aluminumRim Width: Rim Depth: [front] 22 mm; [rear] 25 mmFront Spoke Count: 18Front Hub: MavicFront Hub Type: Rear Spoke Count: 20Rear Hub: MavicRear Hub Type: Spoke Material: [front and rear drive side] Zicral (bladed aluminum); [rear non-drive side] carbon fiberSpoke Nipple Material: Skewers: includedAxle Type: [front] 9x100 mm; [rear] 9x130 mmBrake Compatibility: rim brakeRotor Compatibility: Wheelbag: Front Weight: 645 gRear Weight: 800 gComplete Set Weight: 1445 gRecommended Use: cycling, training, racingManufacturer Warranty: 2 years