We build bearings, so we build bottom brackets. The humble threaded bottom bracket is often the first part installed on a new frame, and the last one the rider thinks about during the life of the bike, but the bottom bracket has a direct effect on pedaling efficiency (read: speed). This is where you put your power into the bike. Having the absolute best interface between your effort and your bike’s forward momentum makes your ride better. The Threadfit™ 30 is how we make bikes that take 30mm cranks the best they can be.

Our ThreadFit™ 30 bottom bracket is silky smooth and long-lasting thanks to our legendary, angular-contact bearings, both steel and ceramic, the best in the industry. They actually get faster over time as their contact surfaces wear, because we build them to ultra-tight aerospace tolerances, using machined, Delrin-spindle sleeves to create a perfect and precise fit between cranks and frame. That’s where the low drag and butter smooth feel come from.

You want this bottom bracket because it offers super low drag. You want this bottom bracket because it can be opened, cleaned and repacked for years of faithful service. You want this bottom bracket because you don’t want to think an awful lot about your bottom bracket.

• 5-year built-to-last warranty


• Legendary Chris King bearings


• Easily serviceable


• BSA standard thread


• Conversion kits make these bottom brackets easily configurable


• Engineered, manufactured and assembled in Portland, Oregon USA

* Requires the use of TBB006 Bottom Bracket Socket Tool to install

Also, one of the below conversion kits is required for this bottom bracket installation.

Chris King ThreadFit™ 30 Bottom Bracket Conversion Kit Guide

SRAM Dubb
BB Conversion Kit - Threadfit 30 DUBB #1 MTN
BB Conversion Kit - Threadfit 30 DUBB #2 Road

30mm Spindle Cranks
BB Conversion Kit - Threadfit 30 #3