Mechanical. Now Unstoppable. Meet the world’s first mechanical drivetrain with Full-Mount durability, rebuildable toughness, and rock-solid shifting under max power. With an easy, foolproof setup and unmatched reliability, Eagle 90 Transmission redefines mechanical shifting for the modern MTB rider. The Best Shift Under Load. Period. Power through every shift, no matter the terrain. With X-Sync tooth profiles and 44 optimized shifting points, Eagle 90 delivers precise, smooth gear changes under full load, whether on an E-MTB or a hard-charging trail bike. Tougher. Smarter. Unstoppable. Forget bent derailleur hangers! Eagle 90’s Full Mount interface anchors directly to the frame at the axle for unmatched strength and precision. It’s so strong you could stand on it, yet smart enough to rotate away on impact, allowing for a quick trailside reset so you can keep riding. Built to Last, Ready to Rebuild With industry-leading durability, you may never need to rebuild your Eagle 90 derailleur. But if you do, it’s the easiest to service ever. With just three tools and a few minutes, you can swap all parts and get back on the trail fast. Plus, rebuild kits and skid plates are readily available to keep your drivetrain running for a lifetime. Dial In Your Ride The Eagle 90 crankset is crafted from forged aluminum for ultimate strength and comes in 5mm increments from 155mm to 175mm. Prefer more torque? Go 175mm. Want fewer pedal strikes? Opt for 155mm. It’s all about what fits your riding style. Effortless Setup, Clean Cockpit With Eagle 90’s "prepare, hang, tighten" process, installation is shockingly simple. Just route and tension the shift cable, and you’re ready to rip. Plus, the redesigned Eagle 90 shifter delivers the most satisfying mechanical click yet - sleekly mounted parallel to the bar for a clean, modern cockpit. Eagle 90 isn’t just mechanical shifting, it’s the next evolution of it. Eagle 90 Transmission Features: Hangerless Interface (UDH) frame compatibility only. Available in SRAM/Brose and Bosch specific chainring and crankset offset variants with “Gap Cap” for a seamless between crank and ring. Forged aluminum crank arms. Includes clip-on guard Eagle 90 shift lever features stealth architecture, and MMX compatibility for seamless pairing with SRAM brakes. Cockpit tidying Shift Housing/Brake Hose clip included Dedicated single-click variant Shift lever is built with modern shift ergonomics and a premium textured aluminum lever touchpoint Black XG-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 Specs: Crank Arms Derailleur Shifter XS-1275 Cassette XS-1270 Cassette Eagle Chain Crank Arms Crank Arm Length: 150mm, 155mm, 160mm, 165mm, 170mm Motor Interface: Brose, Bosch, Bosch BDU38 BB Spindle Interface: ISIS Weight: 490 grams (160mm) Model ID: FC-90-PA-A1 Derailleur Cable Pull Ratio: T-Type Actuation Max Tooth: 52t Cage Material: Aluminum Drive Config: 1x Shift Technology: T-Type Actuation Chain Technology: T-Type Weight: 395 Grams Shifter Clicks: Single Cable Pull Ratio: T-Type Actuation Cable Length: 2200mm Shifter Type: Trigger Clamp: Included Weight: 135 Grams Model ID: SL-90-PA-A1 XS-1275 Cassette Freehub Interface: SRAM XD Gearing: 10-52t Cog Finish: Black, Silver Technology: XS Cog Sizes: 10-52t:10,12,14,16,18,21,24,28,32,38,44,52 Weight: 445 grams XS-1270 Cassette Availability: Sold Separately Freehub Interface: Shimano HG Gearing: 10-52t Cog Finish: Black, Silver Technology: XS Cog Sizes: 10-52t:10,12,14,16,18,21,24,28,32,38,44,52 Weight: 565 grams Eagle T-Type Chain Outer Link Finish: Nickel Outer Link Color: Silver Inner Link Finish: Chrome Hardened Inner Link Color: Silver Chain Connector: PowerLock 12s T-Type Chain Length: 126 links Pin Variant: Solid Pin Weight: 285 grams
