The SRAM Eagle 90 is a cable actuated rear derailleur for Eagle Transmission. It uses the same Full Mount design as SRAM's electronic Transmission derailleurs and is built to be rebuilt.

What it's for

For riders building or repairing a mechanical T-Type drivetrain on a UDH frame.

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 that gives crisp, precise shifts without electronics.

Rebuildable: skid plates, inner and outer parallelogram links, and the cage assembly are all replaceable. The cage threads on without tools.

Compatibility

• Frame: UDH compatible frames only
• Chain: SRAM T-Type
• Cassette: 52t (10 to 52t T-Type)
• Shifter: SRAM T-Type mechanical (Eagle 90, Eagle 70)
• Drivetrain: 1x
• Does not fit: frames without UDH; standard Eagle chains and cassettes

Specs

• Speeds: 12
• Cage: long, aluminum
• Max cog: 52t
• Weight: 395 g (SRAM estimate)
• Color: black/silver
• Model: RD-90-A1
• Part number: 00.7518.188.000

You will also need

• SRAM T-Type chain, cassette, and mechanical shifter

Pairs with

• SRAM GX Eagle T-Type XS-1275 Cassette
• SRAM GX T-Type Eagle 126 Chain