Here's the part of the DUB lineup that catches people out: this specific SKU is the T47 85.5mm Road version, built for frames with the wider T47 shell and using internal bearings rather than the outboard cups you'd see on a 68mm BSA. If your frame measures 85.5mm across the bottom bracket shell with M47 x 1 threads, this is the SRAM DUB bottom bracket that fits. If you've got a 68mm or 77mm T47 shell, you want a different SKU in the same family — worth measuring before you order.

The DUB spindle interface is the whole point of this system. SRAM landed on a 28.99mm spindle diameter that sits between the old 24mm and 30mm camps, and they spec it across Red AXS, Force, Rival, Apex, and the entire mountain crankset range. One bottom bracket family, one spindle size, every modern SRAM crankset. That's the appeal — you're not hunting for adapters or guessing at compatibility when you swap cranks down the road.

T47 itself is the standard that fixed press-fit's biggest problem. You get the larger 47mm shell diameter that lets frame designers run an oversized spindle, but it threads in instead of pressing in, which means no creaking when tolerances drift and no special tools to get it back out. Gutter Seal Technology handles the contamination side — SRAM's sealing system around the bearing keeps water and grit out better than the older designs they replaced.... Read More