The Mavic 2013 R-Sys SLR Tubular Rear Wheel-Tyre System is the lightest alloy wheel available. Only the most advanced Mavic technologies (Tracomp, ISM3D, QRM SL, Exalith…) could make this wheel possible. Low inertia, light weight and responsiveness reach their maximum. All this with no compromise on reliability. The perfect wheel for the most demanding climbers. High lateral stiffness and the superlight Yksion Pro tyres lead to high efficiency and energy transfer. ISM 3D, Exalith reinforced rim, with carbon Tracomp spokes and superlight bearings and axles make this the lightest alloy wheel.