The lightest clincher wheelset available now with a wider deeper rimwhen creating the r sys our goal was to provide gran fondo racers and all cyclists who love the mountains with the best possible wheel choice to achieve their climbing goals with the r sys slr we created a wheel thats not only one of the few clincher wheelsets below the 1300g mark but also the most laterally stiff with high endurance strength and the greatest braking ability full tracomp technology r sys slr features the ful