If you want to convert your mountain bike wheels to tubeless, the spoke holes of the rim need to be sealed from the outside. The Race Face TLR Kit makes this simple and quick for rims with an internal width of 33-45 mm, featuring a rim tape that is 10 meters long, sufficient for more than two 29 or 27.5-inch wheels. The kit includes two valves with removable valve cores and tools. Vault Tubeless Kit including 2 valves, rim width 33-45 mm.