Shimano BB-RS500 Hollowtech II Press-Fit Bottom Bracket High-Quality Bottom Bracket Whether you're building up a fresh bike or replacing a worn-out bottom bracket, you'll want something that is high quality. The Shimano BB-RS500 Hollowtech II Press-Fit Bottom Bracket is designed for Shimano Hollowtech II cranksets. They have a shell width of 86mm and it weighs just 73g. Features Designed for Hollowtech II cranksets Compatible with press-fit frames Shimano part number: EBBRS500PBWeight: 73g | Shimano | Bb-Rs500 Hollowtech Ii Press-Fit Bottom Bracket Press-Fit Bottom Bracket