Mechanical shifting at it’s best. The SRAM Eagle 90 Groupset delivers the dream, and then some. Featuring the same Full Mount derailleur architecture as it’s AXS Transmission siblings, it is unquestionably robust. And for the just in case, the derailleur body features replaceable outer and inner parallelogram links, skid plates, and a tool-free threaded cage assembly, making it the most rebuildable derailleur we’ve ever built. At the heart of the system is a sleek and sturdy forged aluminum DUB crankset, with a signature silver T-Type chainring equipped with removable bash guards. Shifting under load is a signature of Eagle Transmission, and this is made possible on 90 with an XS-1275 T-Type cassette that features full X-Sync technology, and a premium double-click T-Type Actuation mechanical shifter. For those inclined to DIY, mechanical Eagle Transmission has a revolutionary simple four step setup procedure: Prepare. Hang. Tighten. Route. Featuring no limit screws, no b-tension, and no guesswork. Built to take you as far as your imagination and body will allow, Eagle 90 Transmission provides riders with an unparalleled ride experience. - Hangerless Interface (UDH) frame compatibility only - Distinct black and silver finish - Available with 165mm, 170mm, 175mm DUB crankarms, and 32T T-Type chainring with two bash guards - Eagle 90 shift lever features stealth architecture, and MMX compatibility for seamless pairing with SRAM brakes. Cockpit tidying Shift Housing/Brake Hose clip included - Shift lever is built with modern shift ergonomics and a premium textured aluminum lever touchpoint - Black XS-1275 features 10-52t range and full X-SYNC technology for best inboard and outboard shifting performance under load - Full Mount Eagle 90 derailleur is the most rebuildable Eagle Transmission derailleur, with replaceable B-Knuckle, Inner/Outer Links, Bash Guards, Bushings, Cage, and Cage Assembly - Includes GX Eagle Transmission Flattop chain - Available with 165/170/175mm crankarm and 32T chainring - Bashguard compatible IN THE BOX: Eagle 90 Alloy Crankset with 32t chainring Eagle 90 Transmission derailleur Eagle 90 Transmission shifter 10-52T GX Eagle Transmission cassette GX Eagle Transmission Flattop chain Note: Bottom Bracket not included. T-Type cranksets require a DUB Wide BB. Technical Specifications Derailleur / Frame Interface: Only compatible with SRAM UDH compatible frames. If your frame does not use a UDH, this groupset will not fit. Chainline: 55mm Crank Spindle Interface: SRAM DUB MTB Wide (28.99mm Spindle, 55mm chainline, to suit both 148mm boost and 157mm super boost rear hubs). This crank is compatible with SRAM DUB MTB Wide bottom brackets, or is also compatible with standard DUB Boost MTB bottom brackets plus additional MTB Wide Spacer Kit 11.6418.002.003) Chain / Cassette Compatibility: This groupset uses the new SRAM T-Type chain, which is not backwards compatible with SRAM Flat-Top Road or older Eagle 12-Speed drivetrains. Cassette Ratio: 10-12-14-16-18-21-24-28-32-38-44-52 Cassette / Freehub Interface: SRAM XD GS-90-A1