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 !
BB Standard | Common shell width | Frame BB Shell inner diameter | Frame BB Shell threaded ? | Also known as | Notes |
| BSA Threaded BB | 68mm (Road) 73mm (Mtb) 83mm (Downhill) 100MM (Fat Bike) | 33.6 - 33.9mm | Yes | Standard fileté Fileté anglais | |
| TREK BB90/95 | 90.5mm |
| 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) | 41mm | No | PF24 (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. |
| BB30 | 68mm (Road) 73mm (MTB) 84.5mm (Specialized MTB OSBB) 83mm (Cannondale MTB) 120mm (Cannondale Fat Bikes) | 42mm | No | Specialized 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) | 42mm | 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. | |
| BBRight (Cervelo standard) | 79mm | 46mm | No | Cervelo R5ca Frames only. BB shell is 11mm wider on the non-drive side. 6806 bearings are pressed directly into the frame. | |
| Cannondale BB30a |
| 46mm | No | 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 |
| 46mm |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Threaded design = easy install and removal. |