Inner Tube - Heavy Duty - 21" - TR-4 - Center Metal Valve

Two to three times thicker than standard tubes, IRC heavy-duty tubes are incredibly durable, abrasion-resistant and feature great impact-absorption Impressive joint and valve strength Natural rubber construction PRODUCT NAME INNER TUBE TYPE MOTORCYCLE MATERIAL RUBBER DUTY HEAVY DUTY INNER TUBE VALVE STEM TYPE TR-4 (ROUND BASE) / CENTER METAL VALVE (THREADED/NUTS) RIM DIAMETER 21" TUBE FITS TIRE SIZE 2.75-21 / 3.00-21 MOUNTING POSITION FRONT/REAR UNITS EACH RIDING STYLE STREET / OFF-ROAD