Compatible on high-end frames by manufactures such as Speedco, Haro, Redline, & Chase (carbon), the Avian Sealed BB86 Bottom Bracket is a simple, yet noticeable upgrade over your older bracket. Installation is quick and easy, with no spacers required. And with 10mm of bearing surface contact with the shell, the days of creaky, rickety will be long behind you. Designed for cranks with 24mm spindle SPECIFICATIONS Composite Cups Compatible with 24mm spindles Inner plastic O-rings and dust shields 41mm press-fit cup for 86.5mm shells Sealed bearings WEIGHT: 2.65oz/75g