Mavic Cosmic SL 45 23i Carbon Wheel Black, Rear, HG, 12x142mm

What Our Gearhead(R) Experts Are Saying: "I've been riding the Cosmic SL 45s on everything from crits to long climbs, and they're the ultimate balance of lightness, speed, and stability. The 45mm rim depth keeps things aero without catching wind, and the new Infinity hub design makes power transfer feel instant. Paired with tubeless 28s, they roll smooth, fast, and quiet-ready for any ride that calls for efficiency and control."We turn to the Mavic Cosmic SL 45 Disc front and rear wheels when we want the perfect middle ground between aero efficiency and lightweight climbing performance. With 45mm-deep unidirectional carbon rims and a 23mm internal width, these wheels bring modern versatility to road setups-fast on flats, confident in crosswinds, and lively when the road tilts upward. Mavic's refined shaping and flat aero spokes, honed in wind tunnels, make every watt count while enhancing stability at high speed. Both wheels feature the brand's new Infinity hub platform for seamless power transfer and responsive acceleration. The rear hub uses Mavic's QRM sealed cartridge bearings and convertible freehub system to accommodate Shimano drivetrains, while the front hub's precise 12x100mm spacing ensures smooth braking and tracking through every corner. Fully tubeless-ready with a traditional 24-hole build and 2-cross lacing, they're designed for easy setup and dependable strength without sacrificing performance. Whether chasing a fast century, racing road, or exploring rolling all-road routes, the Cosmic SL 45 Disc front and rear deliver a ride that feels fast, balanced, and efficient.