5DEV BSA Aluminum Ceramic Bottom Bracket

The 5DEV BSA Aluminum Ceramic Bottom Bracket is a threaded bottom bracket for frames with a BSA shell, the British standard and still the most common threaded shell on road, gravel and mountain frames. BSA threads into the frame rather than pressing in, so it comes back out with the right tool instead of a press. This is the aluminum model rather than 5DEV's titanium BSA bottom bracket: CNC-machined aluminum bearing cups and an aluminum internal sleeve, running premium ceramic bearings. 5DEV designs and machines it in San Diego, California.

5DEV developed this bottom bracket for its own Frameworks race team, where parts are ridden hard, pressure washed constantly and expected to last a full season. 5DEV reports it came through Lifetime Unbound XL unscathed, across 356 miles of constant rain and mud in the harshest weather in that event's history, where only 59 of 237 starters reached the finish. The bottom bracket takes 29mm SRAM DUB and 5DEV 29mm spindles and weighs 82 grams. In the box are a connecting tube, two aluminum bearing washers, a 2mm and a 3mm spacer to suit your shell width, and a pouch of anti-seize, which earns its place on an aluminum bottom bracket that will sit in the same frame for seasons. Installation takes a Park Tool BBT-79.3.