The SRAM DUB BB386 Bottom Bracket is built around a 28.99mm DUB spindle interface — an oversized axle diameter designed to improve stiffness and reduce flex where power transfer matters most. Constructed from aluminum and steel, it presses into BB386 EVO shells and brings SRAM's DUB standard to frames built around that wider shell format. At 89 grams, the bearing assembly stays out of your way while doing its job — smooth rotation, solid sealing, and a fit that's designed to last through the kind of mileage that wears out lesser setups. If you're running a SRAM DUB crankset on a BB386 frame, this is the direct, no-adapter solution. SRAM DUB BB386 Bottom Bracket Specs at a Glance Shell Type: BB386 EVO (Press-fit) Shell Width: 73mm Axle Interface: 28.99mm DUB Weight: 89g Materials: Aluminum / Steel
