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    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

    *Specifications are subject to change. Please read our Terms & Conditions

    *Giant & Liv Bicycles are available for purchase online, but due to warranty regulations, must be shipped to qualified Giant dealers, as bicycles must be assembled by a qualified bike mechanic in an approved store - This is an international policy and usually will require an additional fee to build the bike. This will be confirmed by one of our online staff after purchase of the bike.

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