Sram Eagle 12 Speed Powerlock Chain Connector

SRAM Eagle 90 Transmission MTB Groupset | 55 mm Chainline, 174 mm Q-Factor – Fitted by Bike Clinique

If you’re looking for the best mechanical MTB shifting on the market, the SRAM Eagle 90 Transmission is the real deal. We’ve fitted this groupset on several customer bikes here at Bike Clinique, and I can honestly say it’s a game-changer. Whether you’re hammering up technical climbs or blasting descents, the Eagle 90 delivers crisp, precise shifts every time—no batteries, no fuss, just solid engineering.

Why We Rate It at Bike Clinique:
The Eagle 90 rear mech uses the same full-mount interface as the top-end electronic versions, so it’s rock-solid and easy to service if you ever need to. The whole setup is designed for reliability and simplicity—SRAM have stripped away anything unnecessary, so you get flawless shifting under load and a drivetrain that’s easy to fit and maintain.

We’ve had a few DIY customers install these themselves, but if you want it dialled and running perfectly from day one, we’re happy to fit and tune it for you in our Wimbledon workshop.

What You Get:

• Crank: Eagle 90 DUB Wide, forged aluminium – robust, good-looking, and available in 165, 170, or 175 mm lengths. Compatible with SRAM 8-bolt chainrings.

• Chainring: 32T, stamped steel, with replaceable bashguards (reinforced plastic) for proper protection.

• Cassette: XS-1275 T-Type, 10-52T (12-speed), for a massive 520% gear range. X-SYNC design means it shifts even better the harder you pedal.

• Rear Derailleur: Eagle 90 Transmission, cable-operated, full-mount, built for UDH frames only.

• Shifter: Eagle 90, right-hand, with a super positive feel.

• Chain: GX Eagle Transmission Flattop – unique, flat-topped design for stability, strength, and a modern look.

Specs at a Glance:

• Gears: 12-speed (10-52T)

• Chainline: 55 mm (Wide)

• Q-Factor: 174 mm

• Crank Lengths: 165, 170, 175 mm

• Freehub: SRAM XD (XDR with 1.85 mm spacer)

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

• Material Highlights: Forged aluminium crank, steel/aluminium cassette, aluminium/plastic shifter

• Colour Options: Black & silver throughout

• Weight: 2099g (175 mm crank, weighed in-house)

Real-World Performance:
Our customers love the positive, mechanical feel of the Eagle 90. It’s robust enough for UK conditions, and the full-mount rear mech is a big step forward in both durability and serviceability. The shifting is smooth and reliable, even under heavy load—perfect for anyone who rides hard and wants zero drama.

Fitted by Bike Clinique:
We’ve installed these on everything from full-suspension trail bikes to hardcore hardtails. If you want to talk through compatibility or book a fitting, just give us a shout or drop by the Wimbledon workshop. We’ll make sure your setup is spot-on.