SRAM Eagle 90 T-Type DUB Groupset — 12-Speed Mechanical (10–52T)

This is SRAM’s Eagle 90 T-Type DUB mechanical groupset—a complete 12-speed drivetrain kit built around SRAM’s Transmission platform for modern mountain bikes. It’s designed for riders who want full T-Type shifting performance in a cable-actuated system, with durable components meant for aggressive trail and enduro riding. Key Functional Details Complete SRAM Eagle 90 12-speed mechanical groupset Eagle 90 DUB Wide crankset (165 / 170 / 175mm depending on configuration) 32T T-Type direct mount chainring with guards Eagle 90 rear derailleur (Transmission mount) Eagle 90 trigger shifter GX T-Type chain, 126 links XS-1275 GX T-Type cassette, 10–52T range DUB spindle crank interface Wide-range gearing for trail, enduro, and e-MTB applications Compatibility & Technical Notes Requires UDH-compatible frame (Universal Derailleur Hanger) Designed for SRAM Transmission (T-Type) systems only NOT compatible with legacy Eagle AXS or mechanical Eagle components Requires XD driver for included 10–52T cassette DUB bottom bracket required (sold separately) Chain, cassette, derailleur, and chainring are T-Type specific Not cross-compatible with non-T-Type SRAM or Shimano drivetrains Crank length varies by kit configuration Service / Ownership Context This is a modern Transmission drivetrain that relies on precise frame alignment and correct installation. Setup is different from traditional derailleurs and must follow SRAM’s T-Type procedures for best shifting and durability. Fit & Use Signals Good Fit: Modern trail and enduro bikes with UDH frames, riders wanting mechanical T-Type performance, high-torque e-MTB or aggressive MTB use. Not A Fit: Frames without UDH, legacy Eagle bikes, Shimano drivetrains, or riders looking for budget 12-speed upgrades. This is Transmission, just mechanical. Everything mounts differently than old Eagle. Biggest customer mistake: thinking this bolts onto any 12-speed SRAM bike. It doesn’t. Needs UDH frame and full T-Type ecosystem. Second mistake: trying to mix parts. You can’t run this derailleur with old GX cassette or chain. T-Type is its own world. Install matters. Setup requires exact chain length and following SRAM’s alignment steps. If rushed, shifting will feel awful. Derailleur mounts directly to frame, no hanger. That’s great for stiffness but means crash damage goes straight into the derailleur or frame. Chainring guards help with rock strikes but still not indestructible. Riders love how solid it feels under load—shifts while pedaling hard are noticeably better than old Eagle. Complaints usually come from install errors or people surprised by replacement part costs. Wear items: chain first, then cassette. E-bikes eat these faster. Who this is really for: modern MTB riders with UDH frames who want Transmission performance without AXS. Who should avoid: anyone on older frames, budget rebuilds, or riders who like mixing drivetrain brands. Mechanic advice: confirm UDH before selling. Use SRAM setup guide. Measure chain twice. Tell customers derailleur alignment is frame-dependent—bent frames = bad shifts.