Yana Shiki VS101B Black Right Angle Valve Stem Assembly for Motorcycle Tire Replacement Tire inflation on dual disc brakes is so much easier with the right-angle valve stem Less hassle adjusting the air chuck between the brake disc and less weight on the wheel rim (made of lightweight aluminum construction) For tubeless rims designed for 8.4 millimeter diameter stems Right angled valve stem has a 90 degree bend from the surface of the wheel rim Sold as a set in blister package