SRAM Introduces New DUB Cranks and Bottom Brackets

SRAM Dub Cranks and Bottom Bracket

SRAM has just released their all new Dub crank and bottom bracket. The design is intended to create a longer lifespan for cranks and bottom brackets. They are also trying to create a more simple lineup as they do have quite a large selection to choose from...

The Durable Unified Bottom Bracket (DUB) features a significant weight loss in comparison to the existing XX1 crankset. the most important change is the spindle which will now be 28.99mm instead of a 30mm or 24mm (GXP) which has been a standard of theirs over the past couple years. As many of you know, finding the exact crankset and Bottom Bracket that was compatible with your bike could only be solved by a brain surgeon. Sram has attempted to make it simple to the consumer and have one size spindle diameter but 4 Bottom Brackets that will accommodate all existing Mountain bike Frame standards.

SRAM DUB Crankset Bottom Brackets

The most noticeable change will be in the XX1 cranks. These Light weight XC cranks have become even lighter now that Sram has shaved off about 80g leaving the crankset with a 32t ring at about 422g. Don't be afraid that this may be too light. The product is backed by an immense amount of testing from Sram's world class riders.

Some may ask "why would they choose such a weird size at 28.99mm?" Well according to their developers, the size will perfectly balance bearing size, durability and weight. Aside from the sizing there are a few changes like more seals to better secure your bearings from dirt and water and metal cups instead of plastic for their pressfit models. Yes that means you probably won't have a creaking Bottom Bracket after the first 50 miles.

Pricing and sizing will be seen here:

SRAM Dub Chart
This new BB spindle sizing does not mean you won't be able to buy a GXP Bottom bracket anymore. They will continue to produce GXP Bottom brackets so you are not forced to get new cranks if yours are not broken. Like all changes we should expect to see GXP slowly fall off in the up coming years.

"Forward thinking and backwards compatible DUB™ BB/Crank technology is the workhorse without restraint. Designed for the most discerning pros. And riders who set it and neglect it. DUB™ is compatible with all major bottom bracket standards. Offering better sealing than ever before, without having to make compromises to fit all frames. Yet it opens the door for a new crank spindle for the world’s all-time lightest crankset. It’s a new approach that embraces the old. And it’s about time." - SRAM

January 16, 2018

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