Shimano Dura-Ace R9270 C60 Tubeless CL Disc Front Wheel The Shimano Dura-Ace R9270 C60 Tubeless CL Disc Front Wheel rolls incredibly fast, with its aerodynamic and laterally rigid design. The alloy hub is laced to the full carbon rims by 24 spokes, which are stiff and strong. The rim itself is a deep 60mm, tubeless-ready and wide at 28mm externally. Optimised for tyres between 25mm and 32mm, the air volume is maximised so grip is enhanced and rolling resistance lowered. Thanks to the wind-tunnel engineered shape, this wheel is ideal for time trials, triathlons, and flat criteriums in which going fast is a priority. Highlights WH-R9270 TL carbon clincher disc brake designed to meet pro road race criteria Lightweight full carbon 60mm deep rim for improved aerodynamics, increased rigidity and excellent inertia for sprinters and TT specialists Easy to use Center Lock rotor mount for use with disc brakes Stainless steel butted (2.0-1.8-2.0) and bladed straight pull spokes for optimal balance and rigidity (OPTBAL) Elbow-less spokes make for a strong yet compliant wheel High lateral rigidity is produced with a wide flange spacing Labyrinth double-contact sealing effectively shuts out water and dirt Alloy cone with integrated steel Borozon treated bearing races – super mirror finish reduces friction Cold forged, machined aluminium hub shell and oversized 7075 alloy axle keep the wheel weight to a minimum