SRAM GX Eagle Transmission MTB Groupset

If you’re after a bombproof, high-performance MTB drivetrain that won’t break the bank, the SRAM GX Eagle Transmission is my go-to recommendation. We’ve installed a bunch of these for customers at Bike Clinique, and it’s a proper workhorse—reliable, smooth, and built to handle anything the UK trails can throw at it.

Why We Fit It at Bike Clinique:
The GX Eagle Transmission is perfect for riders who want top-tier shifting and durability, but at a more accessible price point. It’s not just a “budget” option—it’s SRAM’s proven technology, just using slightly less exotic materials than the XX or X0. We’ve seen these groupsets stand up to daily abuse, rough weather, and big mileage without missing a beat.

The rear mech mounts directly to UDH frames—no hanger to bend, no faff. Plus, the shifting is genuinely impressive, even under heavy load. If you want a groupset that just works, day in and day out, this is it.

What We Install:

• Crank: GX Eagle, full aluminium, available in 165, 170, or 175 mm—stiff, light, and tough enough for year-round riding.

• Chainring: 32T, designed for wide (55 mm) chainlines.

• Cassette: GX Eagle Transmission, 10-52T (12-speed), 520% gear range. X-SYNC tech means you can shift under power—no hesitation, no crunching.

• Rear Derailleur: GX Eagle Transmission, direct-mount (UDH only), with overload clutch for extra protection.

• Chain: GX Eagle Transmission Flattop—unique flat-top design for extra strength and smoothness, even on e-bikes.

• Controller: AXS Pod (electronic), right side, with a really intuitive “click and fire” feel.

Specs at a Glance:

• Gearing: 12-speed (10-52T cassette)

• Chainline: 55 mm (Wide)

• Q-Factor: 174 mm

• Crank Lengths: 165, 170, 175 mm

• Freehub: SRAM XD

• Compatibility: UDH frames only; not backwards compatible with older Eagle drivetrains

• Material Highlights: Cassette (aluminium/steel), crank (aluminium), controller (aluminium/plastic)

• Colour Options: Cassette & chain (black, Dark Polar), derailleur & controller (black)

• Weight: 2016g (170 mm crank, weighed in-house)

Real-World Performance:
Our customers love the GX Eagle Transmission for its no-nonsense reliability and the fact it just keeps working, even when the weather turns grim. Shifting under load is smooth and predictable, and the direct-mount design means less maintenance and fewer headaches. It’s a proper upgrade for anyone looking to boost their bike’s performance without going overboard on cost.

Fitted by Bike Clinique:
We’ve set these up on everything from trail bikes to hardcore commuters. If you want to know if it’ll fit your frame or want a pro install, drop us a line or pop into the Wimbledon workshop. We’ll get you sorted with a groupset that’s dialled from day one.