Zipp Speed Weaponry 404 Firecrest Carbon Wheel - Tubular 2012 Black, Front Material: [rim] carbon fiberRim Width: 18.0 mmRim Depth: 58.0 mmFront Spoke Count: Front Hub: Front Hub Type: Rear Spoke Count: 20 holeRear Hub: ZippRear Hub Type: 188Spoke Material: stainless steelSpoke Nipple Material: alloySkewers: not includedAxle Type: Brake Compatibility: rim brake, carbon specific pads only Rotor Compatibility: Wheelbag: Front Weight: Rear Weight: 698 gComplete Set Weight: Recommended Use: road cycling, training, racingManufacturer Warranty: 2 years