We make bearings, so we build bottom brackets. The humble threaded bottom bracket is often the first part installed on a new frame, and the last the cyclist thinks about during the bike's life, but the bottom bracket has a direct effect on pedalling efficiency (read: speed). This is where you put your power into the bike. Having the best interface between your effort and your bike's momentum improves your ride. The Threadfit™ 24 is how we make bikes equipped with 24mm cranks the best way possible.

ThreadFit™ 24 fits 24mm cranks in BSA bottom bracket shells.

Our ThreadFit™ 24 bottom bracket is designed and built to be durable, usable and silent. Made to create the most precise interface between your frame's bottom bracket and your cranks, it allows your cranks to spin lightly and easily, without interference, for the lifetime of your bike (with a little regular maintenance). King's legendary angular contact bearings, in steel and ceramic, are the best in the industry and actually become faster over time as their contact surfaces wear in.

You want this crankset because it offers very low drag. You want this bottom bracket because it can be opened, cleaned and repacked for years of faithful service. You want this crankset because you don't want to think too much about your crankset.

Our Threadfit™ 24 bottom brackets are available in a range of beautifully anodised colours and each includes fitting kits that allow our ThreadFit™ 24 to be used with a wide selection of road and MTB bike cranks.

Designed, manufactured and assembled in Portland, Oregon, USA

King lifetime warranty

Legendary in-house manufactured bearings

Available in 8 beautifully anodised colours

A fitting kit is required for use and included in purchase prices

Ceramic bearing upgrade available