Dare to Go Tubeless Muc-Off’s 2nd edition Tubeless Valves are here to ease the transition to a tubeless setup. Machined from aircraft-grade aluminium, they have 6 channels cut into the base of the stem which allows free flow of sealant and air, even when tubeless foam inserts are used. And with the inclusion of a valve core removal tool, installation or replacement is simple. Whether you ride trails, gravel or road, these valves make 'going tubeless' a breeze.