The Mavic Ksyrium UST Disc Wheelset is a favorite for road training and racing, this versatile wheel system produces a lightweight, dynamic ride quality that now has the added benefits of our UST Road Tubeless technology. This patented system provides seamless integration between the wheel and Mavic Yksion Pro UST 28c tubeless tyres. It makes installation, removal and maintenance easier than ever, and you get all the benefits of tubeless, including less rolling resistance and a smoother, more controlled ride quality. Without tubes, you can run lower tyre pressure with no risk of pinch flats, and the sealant helps prevent punctures.