Keep your high-pivot rig running smooth and silent with the MRP S5 Replacement Roller. This authentic factory service part is the definitive solution for maintaining the MXg series chainguides, the gold standard for high-performance chain retention. The S5 roller is engineered with a specialized profile to guide the chain through the intense suspension cycles common on modern long-travel mountain bikes. Featuring a high-quality sealed bearing, it minimizes mechanical friction and prevents the distracting chatter of a worn-out lower guide. Machined from a rugged, fiber-reinforced polymer, this roller is built to endure the same punishment as your frame while protecting your expensive drivetrain from premature wear. Whether you are replacing a battle-scarred part or performing a seasonal refresh, the S5 roller ensures your chain stays on track and your ride stays focused on the descent. Trust factory-original MRP hardware to deliver the professional results your high-pivot bike requires.