The Chris King ThreadFit 30 Bottom Bracket is built on the familiar bsa threading of all the best Chris King Bottom Brackets. A silky smooth long-lasting bottom bracket built around our angular contact bearings that wear in instead of out. The threadfit30 is made for 30mm spindles. Fully serviceable and backed by our 5-year built-to-last warranty this bottom bracket will outlast your bike. Built to ultra tight aerospace tolerances we use machined delrin spindle sleeves to create a perfect and precise fit between cranks and frame providing ultra low drag and a butter smooth feel. With a large range of conversion kits our threadfit30 is ready for a wide selection of cranks. Chris King ThreadFit 30 Bottom Bracket Features Engineered manufactured and assembled in portland oregon usa 5-year built-to-last warranty Legendary made-in-house bearings Available in 9 beautifully anodized colors Responsibly lightweight Easily serviceable with our integrated grease injection system Find your fit with required conversion kits