The Mavic Yksion Pro UST II Tyre offers low rolling resistance and extra speed with a lack of friction between the tyre and tube. New exclusive 11 Storm compound reaches the best balance of grip and low rolling resistance whilst overall remaining lighter than clincher tyre and tube combos. Easily used and repaired, this tyre is the gauranteed perfect match with the Mavic UST Wheel-System. Tight control over beads diameter and stiffness, the kevlar beads stretch just enough for much simpler mounting. Improved comfort with high flat protection, these tyres can run with a lower recommended tyre pressure with no risk of pinch flats. Just 30g of sealant prevents most punctures. The Yksion Pro UST II Tyre offers the best blend of low rolling resistance, grip and comfort, a trilogy that is usually impossible to reconcile. Mavic Yksion Pro UST II Tyre Features Available in 25mm and 28mm The rolling efficiency has been measured 15% lower than a tubetype equivalent in our lab and in practice Tests have also found it super fast in wet turns, bringing them an unmatched confidence Being tubeless, it can be run at lower pressure (about 1 bar / 15PSI less) than a standard tubetype tyre, with no loss of efficiency and with less risk of pinch flat Usually the achille heel of tubeless (mounting and servicing) has been solved by developing it together with wheels for tighter tolerances Stretchable kevlar beads are super easy to mount and dismount 30g of sealant will prepare this tyre to be as airtight as a butyl tube and offers great puncture protection