The SRAM Eagle 90 groupset is a mechanical, cable shifted Eagle Transmission drivetrain. It uses the same Full Mount derailleur design as SRAM's AXS Transmission and needs a frame with a UDH (Universal Derailleur Hanger).

What it's for

A full 1x12 drivetrain for riders who want Transmission shifting under load without batteries. SRAM built the derailleur to be rebuilt, with replaceable links, skid plates, bushings, and cage.

How it works

Full Mount: the derailleur bolts around the axle on both sides of the frame, with no separate hanger.

T-Type actuation: a cable pull ratio made for Transmission, paired with a double click downshift in the shifter.

Full X-SYNC cassette: tooth shapes on the XS-1275 cassette are timed with the T-Type chain so it shifts while you are pedaling hard.

Setup: four steps (prepare, hang, tighten, route) with no limit screws or B tension to adjust.

Compatibility

• Frame: UDH compatible frames only
• Driver: SRAM XD
• Bottom bracket: SRAM DUB (sold separately)
• How to check yours: a UDH frame has a round, threaded hanger on the drive side dropout marked UDH

In the box

• Eagle 90 Transmission rear derailleur
• Eagle 90 trigger shifter (right)
• Eagle 90 DUB crankset, 170 mm
• 32t T-Type chainring with 2 bash guards
• XS-1275 T-Type cassette, 10 to 52t
• T-Type chain, 126 links

You will also need

• SRAM DUB bottom bracket for your frame
• Shift cable and housing if not included

Specs

• Speeds: 12
• Crank length: 170 mm
• Chainring: 32t direct mount
• Cassette: 10 to 52t
• Derailleur weight: 395 g
• Shifter weight: 135 g with cable
• Cassette weight: 445 g
• Model: GS-90-A1

Pairs with

• SRAM DUB bottom brackets
• SRAM Eagle T-Type PowerLock