BSA30 Ceramic Bottom Bracket

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(2 reviews)
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AITA BSA30 ceramic bottom bracket converts English thread frames to fit 30mm spindle EVO386, Rotor 3D+, Rotor 3DF, THM and Zipp cranks. But BB30 standard cranksets won’t work with this system.

This is a very ideal conversion bottom bracket to run an EVO386 30mm cranks on an English thread (BSA) frame without spacers.
However, with the other cranks such as Rotor 3D+ there will be two spacers required but all come with the bottom bracket.

With the Grade 3 Si3N4 ceramic balls (8 times rounder and 4 times smoother than the steel's), spinning on the hardened ABEC 7 races, this ceramic bottom bracket only consumes 20% of the power compared with a steel bearing bottom bracket in average, plus the bearings will last 3-5 times longer.

For this particular oversized bearing and the aluminium house, an installation tool is provided for an easier installation.

2 year warranty

Free shipping worldwide.

CNC aluminium external BB cups;
ABEC7 high chrome vacuum degassed bearing steel races with quenching and tempering hardening;
Grade 3 Si3N4 ceramic bearing balls;
Nylon bearing retainer;
Dual lips light contact rubber bearing seals;

Frame requirements:
BSA 1.37"x24TPI English Thread;
68mm width;

Crankset compatibility:

30mm spindle cranksets;
i.e. EVO386,Rotor 3D+, Rotor 3DF, THM and Zipp;


Note: Installation tool included

Frame requirement:
BSA 1.37"x24TPI English Thread; 68mm width
Crank compatibility:
30mm spindle cranksets


  • 5
    Smooth and easy

    Posted by Kiko on 27th Oct 2020

    This bottom bracket works well. I just installed it with EC90 cranks and feels great - smooth and easy. I did have to add spacers to the cups to get the right width beyond what came in the package, but that was not an issue with the product.

  • 5
    Good quality products

    Posted by Eugene on 18th Oct 2019

    These ceramics bb are truly a wonderful thing. It took a few days with hundreds of miles to get broken in. It's now super smooth! Thank you once again for making such wonderful bottom brackets. I plan on getting a couple more real soon for my other bike. I'll be needing a Pressfit BB30 for a FSA BB386EVO crankset. THANKS!!