You have a Shimano crankset. What bottom bracket standard is your bike?



Determine which of our Shimano road bottom brackets is the most compatible with your bike by using this selection guide. BBInfinite’s modules are compatible with all Shimano HollowTech cranksets on the market. Engineered with a one-piece design, these BBs fix bicycle creaking while providing cyclists with consistent shifting and drivetrain performance. Additionally, these road bike bottom brackets feature dual polymer bearing shields to prevent dirt and debris from getting into the precision bearings. Our Shimano bottom brackets are fully compatible with crank-based power meters.

Now that you have selected a Shimano road crank set for your bike, or you intend to install on your bike, you may select the appropriate road bottom bracket standard of your bike to jump directly to the Shimano bottom bracket you desire:

For ALL Shimano HollowTech II road crank sets, double or triple, standard or compact, select the compatible frame bottom bracket standard button above.

The possible Shimano road bottom bracket standards are:

BBRight (79mm)

BB86 (86.5mm)

T47 Internal

T47 External (68mm)

BSA English Threaded (68mm) 1.37 x 24TPI

Italian Threaded (70mm) 36mm x 24TPI

PressFit30 (68mm)

PressFit30A (73mm)

BB30 (68mm)

BB30A (73mm)

BB386EVO (86.5mm)

Trek BB90

Specialized OSBB (61mm)

Note: If you have any questions, or need help identifying your bottom bracket standard, please call our Customer Service line: 866.865.3335.

Or email us:

Now, please select the appropriate Shimano bottom bracket above. Thank you.

Bottom Bracket Selection Guide