A bottom bracket built to outlast your frame. BB ALPHA features hardened stainless-steel races hand-built with grade-3 Silicon Nitride ceramic balls, custom-engineered seals and precision dust covers, delivering up to 500% better moisture protection, while still providing ultra-low friction performance. The simplified spacer tube design and lighter cups ensure quick installation and a 10% weight reduction over previous generations.Precisely pair a SRAM DUB crankset with 28.99 mm axle with a BSA or English threaded frame by selecting this high quality bottom bracket from CeramicSpeed. Specifications:- Net weight: 87.0 g- Gross Weight: 213 g- BB Type: BSA English Threaded 68mm- Crank Diameter: 28.99- Crank Brand: SRAM- Crank Width: 69.0In the box:- BB ALPHA for BSA SRAM DUB Road- DUB Spacer Kit - UFO All Round Grease 5 ml- Decal