CK Ceramics bottom bracket assembly First Look - Road Cycling UK

Expert road bike reviews and the latest road bike news, features and advice. Find rides & events, training articles and participate in our forums



CK Ceramics bottom bracket assembly First Look

There’s ceramic stuff in there

The advantages of ceramic balls over steel for ball bearings are several: formed of silicon nitride (Si3N4), they are about 30percent lighter than steel equivalents and rounder ( closer to a perfect sphere) for smoother running. They are also harder, so they lose less energy to elastic deformation and last longer with greater resistance to water and dirt ingress and loss of lubricant.

 The latest such bearings to land on the RCUK desk arrive courtesy of CK Ceramics, based in France. Our test sample is a Shimano Hollowtech II road-type bottom bracket assembly, which is available in six colours and weighs 88g. There’s a mtb version weighing an additional 3g due to the spacers required and a heavier-duty seal that that required for the road.

Grade 3 silicon nitride balls run in ground and hardened chrome steel races housed in CNC-machined aluminium cups with, for the moment, BSC threads. Italian threaded cups are on their way. SRAM-format bearings are also on offer.

Price for the bottom brackets is £99.99 including insured postage. More when we’ve covered a few miles.


Newsletter Terms & Conditions

Please enter your email so we can keep you updated with news, features and the latest offers. If you are not interested you can unsubscribe at any time. We will never sell your data and you'll only get messages from us and our partners whose products and services we think you'll enjoy.

Read our full Privacy Policy as well as Terms & Conditions.