Looking for the easiest way to up the performance of your bike? A home mechanic can install our EZ Install bundle in no time. Ceramic Oversized Derailleur Pulleys : Full ceramic or hybrid ceramic pulleys reduce drivetrain friction, improve shifting accuracy, and outlast standard plastic pulleys. Ceramic Bottom Bracket : Extremely reliable and efficient bottom brackets that increase bottom bracket stiffness. Stem & Bottle Bolts: Improve the performance and appearance of your bike. *After placing an order, our team will work with you to configure your kit and determine the right parts for your bike.