The fastest wheels in wind tunnel testing for disc brakes, 38mm profile. With only 12.1 watts of air resistance at 45 km/h, they offer unprecedented performance. A curved, wide rim minimizes wind resistance, even with 30mm tires. Cutting-edge technology with ultralight graphene rims and now featuring the new NITRO2 ceramic hubs with 4 pawls and 48 teeth. Innovative and designed to break limits and stand out. Available sizes: 700c Rim material: Graphene with T1000 Carbon Fiber Finish: Spectro with AIR+PLUS profile Profile: 38mm Inner Width: 23mm Outer Width: 30mm Tire Compatibility: Clincher, Tubeless Ready Hub: Nitro2 Ceramic Disc ROAD 48 Teeth 4 Pawls Bearings: Ceramic Coax Brake System: Disc Center Lock Rear Axle: 12×142 Hubs: Shimano / Sram XD-R / Campagnolo N3W / Microspline Spokes: Sapim Aero CX-Ray Straight Pull Set weight (g): Cover: 1290 Colors: Black / White Max weight recommended cyclist (kg): 110 Recommended cover size: 28mm to 36mm