Inner Tube - Standard - 21" - TR-4 - Center Metal Valve Splice is placed opposite the valve, which helps to provide a more balanced tube, Features an overlap splice which is stronger than the butt splice used in most others, Michelin Airstop tubes are used by those who want the very

Specs Product Name Inner Tube Type Motorcycle / Off-Road Material Rubber Duty Standard Inner Tube Valve Stem Type TR-4 (Round Base) / Center Metal Valve (Threaded/Nuts) Rim Diameter 21" Tube Fits Tire Size 90/90-21 / 2.50-21 / 80/100-21 / 2.75-21 / 90/100-21 / 3.00-21 / 80/90-21 Mounting Position Front/Rear Units Each Riding Style Street / Off-Road / Adventure Touring / Dual-Sport