Mavic's Ksyrium SL has seen everything from the cobbles of the Roubaix, to the summit of Ventoux. Mavic's machined Maxtal ISM rims, super-smooth QRM hubs and ultra-aero Zicral flat spokes make this one of the fastest, most aerodynamic wheelsets on the planet. Plus, Mavic's exclusive Isopulse lacing optimizes acceleration and power and provides unparalleled stability. And, not only are these wicked wheels super light and aero, they're stiff for rock-solid sprinting, climbing and cornering. No wonder so many pros win on them!