Aluminum

FREE TNT DECALS WITH EVERY PURCHASE TNT Chain Tensioners (set of 2 - left and right) Designed to secure your rear wheel in place when pedaling and high speeds. There is nothing fun about your rear wheel slipping forward causing a tragic wreck and potential injury. These are commonly used in the race scene and normal casual riding. The added security of knowing you have these tensioners on your bike is priceless. 100% CNC Machined from aircraft quality 7000 series aluminumDesigned and Manufactured in the United StatesFits frames and hubs that use a standard 3/8" or 10mm axles (without adaptors) or 6mm axles often used on mini / junior hub sets (with silver adaptors) Single set screw with push bar design that rests against your frames rear dropoutLaser etched TNT logoincludes 2 chain tensioners (left & right) along with the optional 6mm adaptors