A light and sturdy wheel tyre system for disc brakes with high end yksion elite tyres and wide and light ism rims newwith the new trend for disc brakes on road bikes the ksyrium disc is a natural evolution of our popular ksyrium wheel and as with all our ksyrium wheels its designed to take long and hard mileage like no other with great versatility and amazing comfort on any kind of ridedisc specific changesthe rims on this version get our patented ism inter spoke milling technology which