SRAM GX Eagle Fat Bike 12-Speed 30T DUB Crankset

The SRAM GX Eagle DUB Fat Bike crankset is made for fat bikes running 12-speed Eagle, with forged aluminum arms and a 30T X-SYNC 2 direct mount chainring. It is offered for 170mm or 190mm rear spacing, so you pick the version that matches your frame.

Arm lengths are 165, 170 and 175mm, though not every length is offered for both spacings. The bottom bracket is sold separately.

Who It's For

• Fat bike riders on SRAM Eagle 12-speed drivetrains
• Frames with 170mm or 190mm rear spacing (listed as 170/177 and 190/197 hubs)
• Riders who want a 30T ring for low gearing in snow and sand
• Consider a different crank if your bike has standard Boost or SuperBoost mountain spacing, or a non-DUB bottom bracket

What to Look For

• Rear spacing: choose 170mm or 190mm to match your frame. The 165mm arm is offered only in the 190mm version.
• Spindle interface: SRAM DUB, bottom bracket not included.
• Length: 165, 170 or 175mm.

Key Features

7000-series forged aluminum arms hold up to cold, wet and gritty fat bike conditions, where durability matters more than grams.

The crank uses a SRAM DUB spindle. Fat bike frames use wider bottom bracket shells, so confirm the DUB bottom bracket for your exact shell; it is not included.

The 30T X-SYNC 2 chainring mounts directly and is designed for Eagle chains. The smaller ring gives easier gearing for pushing big tires through soft surfaces.

Spacing is the key choice: the 170mm and 190mm versions position the ring for different rear hub standards, so ordering the wrong one will cause poor shifting or chain rub.

Rider Intent Summary

• Biggest strengths: A fat-bike-specific GX Eagle crank with a low 30T ring, durable aluminum arms and two spacing options.
• Tradeoffs: Not all lengths come in both spacings, the bottom bracket is extra, and it will not suit standard mountain bike spacing.
• What makes it different: It is built around fat bike hub standards, which most mountain cranks don't cover.

Victory's Take

We point fat bike riders to this GX Eagle crank when they want 12-speed Eagle with a sensible 30T ring. Victory Bicycle Studio can confirm your rear spacing and shell width before you order.

Specifications

• Brand: SRAM
• Model: GX Eagle DUB Fat Bike Crankset
• Chainring: 30T X-SYNC 2, direct mount
• Chainrings: 1x, chain-retaining single
• Drivetrain speeds: 12
• Spindle interface: SRAM DUB
• Rear spacing options: 170mm, 190mm
• Hub compatibility: 170/177 and 190/197 hubs
• Crank lengths: 165 (190mm spacing only), 170, 175mm
• Arm material: 7000-series forged aluminum
• Color: Lunar (gray)
• Pedal thread: 9/16"
• Intended use: Fat bike
• Bottom bracket: Not included