T47 threaded bottom brackets solved a real problem: frames could get the internal bearing capacity of press-fit BB86/BB90 shells without the creaking that plagued so many press-fit builds. SRAM's DUB T47 Bottom Bracket is what you install when your frame has an 85.5mm T47 shell and you're running a SRAM Road DUB crankset — Red AXS, Force AXS, Rival AXS, or any of the mechanical-era DUB road cranks. This is the standard Road version (SKU 00.6418.033.000), not the Road Wide variant, so it's the one you want for a standard 145mm Q-factor road crank rather than a Wide gravel setup.

The DUB system centers on a 28.99mm spindle diameter, which sits between the old 24mm GXP standard and the 30mm BB30 standard. That in-between number is the whole point — SRAM engineered it so a single crankset can move between every bottom bracket shell standard on the market with just a different BB, while keeping the bearings large enough for durability and giving the cups more room for beefier seals than a 30mm system allows.

Gutter Seal Technology is the piece that matters day-to-day. Water, road grit, and drivetrain lube runoff all end up at the bottom bracket, and the labyrinth seal design routes contamination away from the bearing surface rather than letting it accumulate against the seal lip. Combined with sealed cartridge bearings, it's a BB you can install and forget about through a full season of wet-weather riding.... Read More