Ultracycle Tubeless Valves No Tubes? No Problems Going tubeless starts at the valve. If the seal fails or the core clogs with sealant, your setup falls apart before you even hit the trail or road. These valves address both of those problems directly. The tapered seat seats against the rim quickly and holds without fuss, and the removable Presta core makes adding sealant straightforward - no syringe gymnastics required. Removable valve core lets you inject sealant directly without dismounting the tire, saving setup time Tapered rubber seat seals against the rim bed on installation, reducing the chance of air leaks at the base36mm lengthcompatible with all rims Sold as a pair covers both wheels and keeps a spare core on hand for field repairs | Ultracycle | Tubeless Valves 36Mm, Pair | Rubber