Mavic Cosmic SLR 45 Disc Wheelset With its wider 23mm UD2 carbon rim, the Cosmic SLR 45 Disc Wheelset stands as Mavic's best-performing road wheel to date. The 45mm airfoil rim minimises drag and is one of the lightest in its class. The external carbon layer features Mavic's UD2 construction, giving a distinctive look and a lighter laminate that saves an additional 15g per rim. The wheelset weighs just 1482g. Enhanced Aerodynamics Mavic's UD2 rim laminate and Fore Carbon spoke attachments reduce weight and eliminate the need for rim tape. The 45mm rim profile and elliptical spokes deliver lower drag and increased watt efficiency. Patented lightweight aero spokes further enhance aerodynamic performance. Faster Than Ever Fore Carbon Technology keeps the rim's upper bridge solid and secure, resulting in greater stiffness. The Infinity hub platform optimises lacing and spoke tension with stiff axles and durable bearings. ID360 freewheel technology enables instant power transfer for a more responsive ride. A More Agile Ride Tubeless setup reduces friction and improves efficiency, grip, and puncture resistance. Lower rim inertia ensures instant acceleration and efficient power transfer.