S3 is the specialist in Trial & Enduro parts. Innovation & high quality are the key words guiding the design of the elements that will make a difference. Tested in all conditions, the S3 products are at the cutting edge of technology & equip the best riders & trial teams. * Eccentrical chain tensors kit made in 7075T6 Aluminium. * They are machined from billet aluminium & are beautiful. * finest top quality component & stunning look * Kit content: * 2 small snails with new chain or to have the rear wheel close to the engine * 2 big snails with long chain * For all modern trial bikes Article: S3 Chain Tensioner Blue Article: S3 Chain Tensioner Blue