ScootsUSA 153-19-5255 Bent Air Valve Stem Bent Air Valve Stem with removable locking nut and seals for tubeless tires.This valve can be taken apart to fit in multiple types of wheel assemblies. Step 1: Remove the plastic valve cap.Step 2: Un-thread valve nut Step 3: Remove upper rubber seal.Step 4: Insert into wheel assembly.Step 5: Put rubber seal on and tighten nut to fit.