Wolf Tooth Tubeless Presta Valve Stem Kit - Red Size:44mm They are made of a

They are made of a flexible

Designed for Shimano’s latest flat mount hydraulic road and gravel disc brakes

Improved materials

locked-in fit eliminating tongue movement and hotspots

Wolf Tooth Tubeless Presta Valve Stem Kit - Red Size:44mm They are made of aThese Presta valve stems are compatible with tubeless rims and tires for road, gravel, mountain, and fat bike wheels. The kit includes two Presta valve stems, two machined aluminum caps, two nuts, two extra valve cores, a unique machined aluminum valve core remover, and three rubber base options for compatibility with more rim internal shapes. Features 44mm and 60mm stem length options Slotted stem base for compatibility with tire inserts Oversized