Kit Tubeless STAN'S ALL MOUNTAIN 27 mm Valves 44mm + Liquide Préventif (200 ml) Sizes:27mm this top of the range model designed for Longueur:42.5mm this top of the range model designed for Downhill riding is made from a material that stiffens upon impact and features excellent impact absorption properties for maximum safety The padding is made from Fizik's exclusive type 1 foam formulation for instant response and optimal power transfer The sealant serves several functions: It spectacularly prevents and repairs all punctures caused by perforation (up to 6 mm) The NOTUBES All Mountain Tubeless Conversion Kit (44 mm Presta valves) is a model compatible with 26 to 29 inch wheels and for rims with an internal width of 25 27 mm