Mavic crossmax pro mtb wheelset boostmixing proven technologies ism 4d ust fore zicral and modern features hookless profile 22mm internal width the mavic crossmax pro is the best high performance all round xc wheelset featuresrims materialmaxtal joint sup drillingfore weight reduction ism 4d valve hole diameter6 5mm tyreust tubeless and tubetype etrto size 27 5584x22ss etrto size 29 622x22ss hookless profile recommended tyre sizes1 1 to 25spokes materialzic