Infelizmente não efetuamos envios para o seu país.

veja os nossos destinos de envio

Por favor contacte o nosso Service Center. Estamos disponíveis até às 17h00: +351 922 127 885

Difficulty: - Similar Topics: Print Article

Bottom bracket types

The most popular sealed bottom bracket systems


• Square taper: Outdated system that is now hardly ever used. The crank arms are fitted onto the ends of a square spindle and tightened by bolts which screw into the spindle on both sides.
• Octalink and ISIS: Older, and now seldom used system. The crank arms are connected to the ends of a spindle with 8 teeth.

The most popular sealed bottom bracket systems with separate bearing cups:


• SM-BB (for Hollowtech II cranks): The current standard system for screwed non-sealed Shimano bearings, compatible with GXP-BB standard.

• GXP-BB: SRAM standard for non-sealed Truvativ bearings, compatible SM-BB standard.

• FSA MegaExo: FSA standard for non-sealed bearings, not compatible with other standards.

• BB-30: Bearing cups without threads are pressed into the bottom bracket shell. The spindle diameter is 30mm. This standard is seldom used.

• Press fit BB-30: Bearing cups without threads are pressed into the bottom bracket shell using plastic adapters. The spindle diameter is 30mm. This standard is seldom used.

• Press fit BB 86.5: Bearing cups without threads are pressed into the bottom bracket shell using plastic adapters. The spindle diameter is approx. 24mm. This is the most popular press fit bearing standard for road bikes. Housing width: 86.5mm.


• Press fit BB92: Bearing cups without threads are pressed into the bottom bracket shell using plastic adapters. The spindle diameter is approx. 24mm. This is the most popular press fit bearing standard for mountain bikes. Housing width: 92mm.

• There are other press fit bearing standards, which have not as yet established themselves.


The most popular threads for bottom bracket systems with threads:


• BSA thread: Used mainly for screwed non-sealed bearings.
• Italian thread: Older standard. Still partly used by Italian producers.


Canyon consistently strives to ensure the quality and accuracy of the information contained in this Technical Support Center. Any repairs or adjustments which you carry out on your bike are entirely at your own risk. If you are in any doubt about what to do, you should send your bike to Canyon or take it to another qualified repair specialist. Canyon gives no guarantee or accepts no liability for the any of the information contained in this Technical Support Center.

Did this article help you?yesno