BB30a-24 Ceramic Bottom Bracket

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BB30a-24 ceramic bottom bracket converts Cannondale BB30a 73mm width frame to accept Shimano 24mm cranks.

Cannondale's new BB30a standard is released in 2016. The BB30a is similar to the BB30 standard, but the frame BB shell is 5mm wider on the non-drive side to make the total width from 68mm to 73mm.

This conversion bottom bracket in an integrated unit to allow a Shimano/FSA 24mm crankset run on a Cannondale BB30a frame without any additional adapters or spacers.

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:
Cannondale BB30a standard frame;
Shell inner diameter 42mm and width 73mm;
i.e. CAAD12, CAADX 2017, Synapse 2014 onward.

Crankset compatibility:
Shimano and FSA 24mm spindle cranksets.


Frame requirement:
Cannondale BB30a standard frame; Shell inner diameter 42mm and width 73mm
Crank compatibility:
24mm spindle cranksets


  • 5
    Brilliant product and service

    Posted by Julian on 18th Sep 2020

    Great product and service thanks for a brilliant transaction.