SRAM DUB is a crank spindle standard for mountain bikes, introduced in 2018.
The crank spindle is designed around an axle diameter of 28.99mm and introduced to replace the two spindle types that SRAM offered in the past: GXP (24mm diameter with a stepdown to 22mm at the non-drive side) and BB30 (30mm diameter).
The release was controversial to say the least. Google 'Pinkbike Sram Dub' if you want to see a comments section on fire.
SRAM claims that by reducing the diameter by 1mm, they had more room available to build sturdier seals, which makes for longer lasting bearings.
A fun detail is that the bottom bracket and crank system is actually built around a 30mm inner diameter bearing, with an outside diameter of 40mm. Not larger, but smaller than a stock BB30 setup.
Ready to make the switch to SRAM DUB? Kogel has you covered with smooth rolling long-lasting ceramic bottom brackets for your mountain bike.
Kogel's SRAM DUB collection is built around the same bearings used in our bottom brackets for 30mm spindles and covered by the same Very Few Questions Asked, 2 year replacement warranty as all our products.
- Road and off-road specific seal options to keep your road, triathlon, TT, cross and mountain bikes running smoothly
- Designed to fit any crank and frame without adapters
- 2-Year, very few questions asked warranty
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