SRAM XX1 Eagle DUB FAT Crankset

XX1 Eagle DUB FAT Crankset

Although we don´t have definitive figures on hand, we can say without a doubt that the XX1 Eagle DUB FAT Crankset is the lightest fat bike crankset ever developed by SRAM. We can make this bold statement, as this crankset´s using the newly introduced 28.99-millimeter spindle diameter that lessens its overall weight (especially when paired with SRAM´s DUB bottom bracket) while maintaining bearing durability and sealing out moisture ingress in snowy environments. It´s designed exclusively for running SRAM´s Eagle 12-speed drivetrain, which provides a massive 500 percent gear range across its 10 to 50-tooth cassette, so you can enjoy the simplified shifting of a 1x set-up—all without reducing your gear range needed for steep climbs and swift descents.

SRAM calls this new spindle diameter DUB, which stands for Durable Unified Bottom Bracket, seeing it´s compatible with virtually any major bottom bracket standard on the market, regardless if your frame boasts a threaded, Press Fit, BB30, or PF30 bottom bracket. Upon introducing this 28.99-millimeter spindle diameter, SRAM aimed to improve bearing life and seal out moisture, then designed the spindle to meet these needs, meaning it´s ready for fat biking in the deepest snow and grittiest springtime melt-off alike. Ultimately, SRAM claims this new DUB crankset is every bit as stiff and light as those with 30-millimeter spindles, but one that provides the increased bearing life of 24-millimeter spindles.

This particular XX1 Eagle DUB Fat Crankset is available in Fat 4 and Fat 5 versions. The Fat 4 accommodates 66.5-millimeter chainlines for riding a fat bike with 170-millimeter rear hub spacing and the Fat 5 accommodates 76.5-millimeter chainlines on those fat bikes with massive 190-millimeter rear hub spacing. Both feature Carbon Tuned arms for superior stiffness and lightweight pedaling efficiency, as well as SRAM´s X-Sync 2 chainring for optimal chain retention and muck-shedding abilities in the snow and dirt.

Details

• Lightest fat bike crankset ever developed by SRAM
• Fat 4: 170mm rear hub spacing, Fat 5: 190mm rear hub spacing
• DUB 28.99mm spindle diameter for durability and lower weight
• Works with all major BBs: BSA/threaded, Press Fit, BB30, PF30
• Bearing life of 24mm systems, stiff & light like 30mm systems
• Carbon tuned crank arms are lightweight and ultra-stiff
• X-Sync 2 chainring sheds muck and retains your chain
• Pairs with Eagle 12-speed drivetrain components
• Item #SRM00CZ

Tech Specs

Arm Material

carbon composite with hollow core

Arm Length

170 mm, 175 mm

Chainring Sizes

30 t

Bolts

direct-mount

Rings

single

BB Type

BSA/Threaded/English, Press Fit, BB30, PF30

Spindle

SRAM DUB (28.99mm)

Q Factor

203.3mm

Chainline

[Fat 4] 66.5 mm, [Fat 5] 76.5 mm

Compatible Components

SRAM DUB bottom brackets, Eagle 12-speed drivetrain components (e.g. chain, cassette, derailleur, etc...)

Claimed Weight

[170mm] 1lb 1oz (481g)

Manufacturer Warranty

2 years