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Bottom Bracket Standards

There are now several different crank bearing systems and standards. The different standards do not allow interchangeability between bearings or cranksets. Having some knowledge of the standard will help the mechanic be aware of service options.


Bottom Bracket Service: PF30

This article reviews bearing removal and installation for PF30 press fit bottom brackets.


Bottom Bracket Service: Cartridge Type

This article will discuss the removal and installation of the common cartridge bottom brackets of the three-piece cranksets.


Bottom Bracket Service: Adjustable Type

This article will discuss the service of adjusting bottom bracket bearings. It will also review the types of tools required.


Bottom Bracket Service: BB90, BB86, BB92, GXP® Press Fit

This article will review the service of the SRAM® GXP® press fit and "Shimano® Press Fit" threadless bottom bracket standards. These systems use a two-piece crank with a nominally 24mm diameter spindle.


Bottom Bracket Service: BB30

This article will discuss the removal and installation of BB30 cartridge bottom bracket bearings.


Bottom Bracket Service: BB30 Adaptors

The BB30 shell will accept adaptors to permit the installation of non-BB30 cranksets. This article covers service of BB30 adaptors for Campagnolo®, Shimano®, SRAM®, and more.


Bottom Bracket Service: Power Torque™

This article will review bottom bracket service for the Campagnolo® Power-Torque™ crankset.


Bottom Bracket Service: Ultra-Torque™

This article will review the bearing service of the Campagnolo® and Fulcrum® Ultra-Torque™ cranksets. The service requires the use of the CBP-3 Campagnolo Bearing Puller and Installation Set. For crank installation and removal see Crank Removal and Installation: Ultra-Torque™.


Bottom Bracket Tapping, Threading, Chasing, and Facing

This article will discuss use of the Park Tool BTS-1 and BFS-1 to perform various machining operations on bottom bracket shells.


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