Race winning proven concept responsiveness rear with a 25 mm rim and faster rolling with 2 cross 24 spoke pattern the right link the new guard2 casing is lighter and as strong as previous generations with the x mix dual compound quest pro xl rear delivering faster rolling with plenty of traction wheel technologies for more responsiveness mavic use ism4d ust rim and ust tubeless ready tyres whilst using maxtal zicral guard2 full compatibility for higher reliability x mix x mix gives y