The new SRAM bottom bracket series DUB has a very simple task: to connect the crank arms together and thereby ensure a durable power transmission into the drive. For this specific requirement, we have designed the DUB crankshaft: a single oversized shaft that works with all bottom bracket standards. For better crank compatibility, better protection from the elements and long-lasting performance - more stable, smoother, simpler. Now get back on the bike! - Intended use: Road bike - Details: - One oversized shaft that works with all bottom bracket standards - Significantly lighter than the PFGXP system - Easy installation, the bearing shells can be pressed into the frame - Type: hollow axle - Frame compatibility: PF30 bottom bracket - Type: pressed bearing shells axle - Axle mount: DUB (28.8 mm).