Renthal R3-3 Off-Road Chain boasts a unique Self-Regulating Seal (SRS) design that are pre-loaded during assembly. The spring effect created during this process delivers constant seal pressure as the chain wears, allowing for extended lubrication intervals while delivering incredible durability unlike traditional O Ring chains which lose sealing pressure as they wear.The result is a strong, long-lasting, high-performance o ring dirt bike chain, ideal for extreme offroad & enduro applications. The R3-3 SRS chain utilises chamfered inner links, extended bushings, shot-peened outer plates and high carbon alloy steel bearing pins. To help with an easy setup, each R3 chain is pre stretched meaning inital adjustments are usually not required. Includes Rivet and Clip Style Master Links.