Finding the correct bottom bracket for your frame can be challenging. To accurately determine the bottom bracket standard in your frame, it is best that you remove your crankset, and any installed bottom bracket cups or bearings. Then, follow the 3 steps listed bellow.

The chart below lists most of the current bottom bracket standards found on today's frames. Once you determine your bottom bracket standard, you then need to Identify Your Crankset. 

Good to know : All Wheels MFG's bearings are replaceable. You don't need to change the entire Bottom Bracket ! 

Measure frame BB shell inside diameter

Measure frame shell width

Measure crank spindle diameter

BB Standard

Common shell width

Frame BB Shell inner diameter

Frame BB 

Shell threaded ?

Also known as

Notes

BSA Threaded BB68mm (Road)
73mm (Mtb)
83mm (Downhill)
100MM (Fat Bike)
33.6 - 33.9mmYesStandard fileté
Fileté anglais

TREK BB90/9590.5mm
  • 37mm
No BB90/92 bearings are pressed into the frame 
BB86/92
86.5mm
90mm
91.5mm
104.5mm
107mm (DH / VTT)
121mm (Fat Bike)
132mm (Fat Bike)
41mmNoPF24 (Chris King)
PF41 (Hope)
PF86
PF92 (Trek)
BB107/PF107
BB121
PF121 (Trek)
BB132

BB86/92 (PF24) is a pressfit BB system. Bearings in cups are pressed into the frame, similar to the PF30 system. Requires use of 24mm or 24/22mm cranksets.

The 29mm BB bearings are pressed directly into the frame. They have a dual bearing row for a higher resistance.

BB3068mm (Road)
73mm (MTB)
84.5mm (Specialized MTB OSBB)
83mm (Cannondale MTB)
120mm (Cannondale Fat Bikes)
42mmNoSpecialized OSBB

6806 bearings are pressed directly into the frame.

Circlips may be required to keep the bearings in the frame.


BB30 Outboard
68mm (Road)
73mm (MTB)
42mmNo

Threaded design = easy install and removal. 2 models available for 24mm Shimano and 22/24mm GXP cranks - compatible WITHOUT adapters. Fits 68-73mm width shells.

BBRight (Cervelo standard)79mm46mmNo 

Cervelo R5ca Frames only. BB shell is 11mm wider on the non-drive side.

6806 bearings are pressed directly into the frame.

Cannondale BB30a
  • 73mm
46mmNo 

The BB30A is similar to the BB30 standard, but the frame BB shell is 5mm wider on the non-drive side. BB30A system uses thin spacers and/or a wave washer between the bearings and the crank arms to take up any slack and micro-adjust the chainline of the crank.

PF30
  • 61mm (Specialized OSBB/FACT)
  • 68mm (Road)
  • 73mm (MTB)
  • 83mm (Downhill)
  • 100MM (Fat Bike)
46mm
  • No
  • PressFit-30

PressFit-30 (PF30) bottom brackets are a separate component pressed directly into the frame.  30mm bearings (6806) are pressed into cups and the cups then pressed into the frame.

Cannondale PF30a
  • 73mm 
  • 46mm
  • No
 

The PF30A is similar to the PF30 standard, but the frame BB shell is 5mm wider on the non-drive side. PF30A system uses thin spacers and/or a wave washer between the bearings and the crank arms to take up any slack and micro-adjust the chainline of the crank.

PF30 Outboard
  • 68mm (Road)
  • 73mm (MTB)
  • 46mm
  •  No
 

Threaded design = easy install and removal. 2 models available for 24mm Shimano and 22/24mm GXP cranks - compatible WITHOUT adapters. Fits 68-73mm width shells.

T47

  • 68mm
  • 73mm
  • 83mm
  • 100mm
  • 47mm
  • Yes

Frame's bottom bracket shell is threaded with M47 x 1 threads.

Left hand threads on the drive-side

Right hand threads on the non-drive.

386EVO
  • 86mm - 92mm
  • 46mm
  • No
 

Threaded design = easy install and removal.