Hyper BB / Ultra BB / Bottom Brackets compatibility
| Model | Compatibility | Specs | Weight |
| BSA 68/73 |   |
SM-BB6700 Installed width (at bearing outer faces): 85.2mm or 90.2mm |
66g |
| BB91-41B |  |
Shell type: Press-Fit bore Ø41mm, width 86.5mm Installed width (at bearing outer faces): 86.5mm |
42g |
| BB91-42 |  |
Shell type: Press-Fit bore Ø42mm, width 84.5mm Installed width w/o spacers (at bearing outer faces): 82.5mm |
44g |
| BB30 |  |
Shell type: Press-Fit bore Ø42mm, width 68mm or 73mm Installed width (at bearing outer faces): 85.2mm or 90.2mm |
65g |
| PF30 |   |
Shell type: Press-Fit bore Ø46mm, width 68mm or 73mm Installed width (at bearing outer faces): 85.2mm or 90.2mm |
66g |
| ITA-70mm |  |
Standard "Italian" BB shell Installed width (at bearing outer faces): 87.2mm |
68g |
| BB386 Evo |  |
Shell type: Press-Fit bore Ø42mm, 86.5mm Installed width (at bearing outer faces): 85.5mm |
59g |
| BB Right 42 |  |
Shell type: Press-Fit bore Ø42mm, 79mm Installed width (at bearing outer faces): 85.7mm |
44g |
| BB Right 46 |  |
Shell type: Press-Fit bore Ø46mm, width 68mm or 73mm Installed width (at bearing outer faces): 85.7mm |
62g |
| T47-e |  |
T47 External Installed width (at bearing outer faces): 85.2mm or 90.2mm |
73g |
| T47-i |  |
T47 Internal Installed width (at bearing outer faces): 86.3mm |
68g |
Important Tech notes
1) The installed width depends from the real BB shell width of your frame unit, overpainting or machining may slighly increase or decrease the width.
This may be compensate by crankset bearing preload device (if there) or by adding/removing axle shims.
2) The correct final assembly should leave the bearings at zero preload with zero axial play too in order to reduce friction and increase bearing life.
For the reasons above never tighten the crank levers before checking that your tightening will squeeze and damage the BB bearings.
3) In case of Pres-Fit shells make always well sure the BB shell bore is well correct on tolerance, generally 0.02mm below its nominal size.
Never press-in a new bearing into a too tight shell, that will cause bad friction and sensibly shorten the bearing life.
4) Remind that good bike shops have reaming tools to face the BB shell width and also to ream shell bore or threads.