Chris King Threadfit 30 Bottom Bracket A Top-of-The-Line Bottom Bracket The bottom bracket is an important part of your bike. It is the part where your crankset connects to your frame so you can pedal smoothly. The Chris King Threadfit 30 Bottom Bracket fits 30mm and DUB spindle cranks in BSA bottom bracket shells. Chris King's bottom bracket is silky smooth and long-lasting thanks to their legendary, angular-contact bearings. They actually get faster over time as their contact surfaces wear, because Chris King builds them to ultra-tight aerospace tolerances, using machined, Delrin-spindle sleeves to create a perfect, and precise fit between cranks and frame. They come in a wide array of anodized colors so you can add a touch of style to your bike. Features Built to ultra-tight aerospace tolerances to create a perfect, and precise fit between cranks and frame Available in a wide variety of anodized colors to match your frame's aesthetic Legendary made-in-house bearings that actually get better over time | Chris King | Threadfit 30 Bottom Bracket Matte Jade