The legacy wheel of the ksyrium family now gets wider rims and a stepped up finish for an improved ride quality weight 1475 grams pair without tyre improved ride quality 17 mm internal rim width increases air volume large volume griplink and powerlink tyres increase comfort rolling efficiency and grip zicral spokes and fore drilling improves lateral stiffness low weight ism 4d rim machining makes for superlight rims zicral spokes lowers weight while maintaining stiffness superlight yksion pr