The fastest tubular wheels in wind tunnels for 50mm disc brakes. With just 10.7 watts of air resistance at 45 km/h, they offer unprecedented performance. A wide, curved rim minimizes wind resistance. The latest in technology with ultralight graphene rims and now with the new 4-pawl, 48-tooth NITRO2 ceramic hubs. Innovative and designed to break boundaries and turn heads.Specifications:- Rim material: Graphene with Carbon fiber- Finish: AIR+PLUS profile- Profile: 50mm- Inner width: 25mm- Tire compatibility: Tubular- Hubs: Nitro2 Ceramic Disc ROAD 48 Teeth 4 Pawls- Bearings: Coax Ceramic- Brake System: Disc Center Lock- Front axle: 12×100- Rear axle: 12×142- Hubs: Shimano- Spokes: Sapim Aero CX-Ray Straight Pull- Weight set (gr): 1330- Maximum recommended cyclist weight (kg): 110- Recommended tire size: 25mm to 32mm