The Race Face Bottom Bracket Cinch PF30 is designed for 68/73mm shell sizes, offering exceptional performance for various cycling disciplines including XC, Enduro, and DH. With its precision CNC machined aluminum alloy cups and external bearing design, this bottom bracket ensures a stiffer and wider stance, enhancing overall bike stability. The bearings are factory filled with high-quality Phil Wood grease for optimal longevity and performance. Weighing just 106 grams, it is a lightweight yet durable choice for serious cyclists looking to upgrade their bike's drivetrain.