SE Racing Chain Tensioner Adjustable (Gold) (3/8" (10mm)) - 4341
SE Racing Chain Tensioner Adjustable (Gold) (3/8" (10mm)) - 4341, SE Bikes Lockit Chain Tensioners Features: Fits 3/8" (10mm) axles CNC machined aluminum Improved design and function Easily adjusts to take up chain slack 2.5 oz per pair