BB30 Shimano Road Ceramic Bottom Bracket

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AITA BB30 Shimano Road ceramic bottom bracket converts BB30 frame to work with a Shimano/FSA 24mm spindle road cranksets. Different from the other's BB30 bottom bracket plus adapter option, this ceramic bottom bracket is an integrated unit which requires no adapter or spacers.

In addition, both sides ceramic bearings moved out from the BB30 frame and extend the supporting width from 68mm to 90mm which are as same as the Shimano/FSA external bottom brackets. Hence with this direct support the conversion bottom bracket runs much more stable, reliable and performs better.

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, AITA's ceramic bearings run much smoother than most of the bearings in the market and only consume 20% of the power compared with the steel bearing, plus the bearings will last 3-5 times longer.

Unique designed dust cover improves the durability of the bottom bracket compared with the traditional Shimano’s design.

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:
BB30 standard frame;
Shell inner diameter 42mm and width 68mm;

Crankset compatibility:
Shimano and FSA 24mm spindle road cranksets.


Frame requirement:
BB30 standard frame; Shell inner diameter 42mm and width 68mm
Crank compatibility:
24mm spindle road cranksets


  • 5
    Great service, very helpful!

    Posted by Peter on 18th Sep 2020

    Highly recommended. Could not have been more helpful when I ordered the wrong part.