Tern Pulley Tensioner AssemblyKeep your Tern bike operating at its best with the Tern Pulley Tensioner Assembly, specifically designed for Tern GSD S00, GSD R14 (Gen. 2), NBD S5i, and NBD P8i models. As a direct replacement part, it easily swaps in to restore optimal chain or Gates Carbon belt tension, helping you maintain peak performance on every ride. Why Choose the Tern Pulley Tensioner Assembly? Works with Chains and Belts: Engineered to handle both traditional chains and