Our Performance Bundle offers a noticeable improvement in your drivetrain at a competitive price. Ceramic Oversized Derailleur Pulleys : Reduce drivetrain friction, improve shifting accuracy, and outlast standard plastic pulleys. "Gain Chain" Wax-Coated Chain : Our wax-coated chain improves drivetrain efficiency over a standard lube chain. *After placing an order, our team will work with you to configure your kit and determine the right parts for your bike.