High-quality PF30 bottom bracket. Three-part notched design. Self-adjusting bearings for increased durability. Fully CNC machined. Anodized 7075-T6 aluminum. Co-injection molded bearing shields. BB30 bearings made of chrome steel. Shell diameter: 46 mm. Compatible with 30 mm axle cranksets. Suitable for 68/73 mm wide bottom brackets. Required tool: Notched 16-sided, 48.5 mm outer diameter (BTL-120).