WHEELS Mfg BB30A Outboard Angular Contact Bottom Bracket

This bottom bracket is specifically engineered for frames with a BB30A interface, which typically features a 42mm shell I.D. and a 73mm width. It is designed to fit these asymmetrical shells perfectly, so please verify your frame's specific bottom bracket standard before purchasing.

Yes, this bottom bracket is designed to adapt standard 24mm spindle cranks to BB30A frames. It eliminates the need for loose adapters by threading the two cups together directly, which creates a more stable, unified structure.

Angular contact bearings are designed to handle both radial and axial loads simultaneously, making them more durable and smoother under the stress of pedaling. They are a significant performance upgrade that helps reduce creaking and extends the lifespan of your bottom bracket.

Yes, you will need a bottom bracket tool with a 44mm x 16-notch pattern to install this unit. Because the cups thread together, the installation process is straightforward and similar to installing a standard threaded external bottom bracket.

Many creaking issues in BB30 systems stem from press-fit tolerances that allow movement between the bearing and the frame. By threading the two aluminum cups together, this system creates a secure, rigid connection that prevents the micro-movements that typically cause noise.