SRAM Eagle 90 eMTB SRAM/Brose Transmission Groupset

Full Mount design delivers unmatched shifting strength and stability. Built for E-MTB demands, this mechanical groupset shifts under full power with absolute control and durability. Easy to install, simple to service, and made to last, the Eagle 90 is the most rebuildable transmission SRAM has ever made.

Key Features and Benefits:

• Full Mount interface replaces traditional derailleur hangers: This design clamps around both sides of the bike frame for unmatched structural support. The benefit is increased resistance to flex and impact, resulting in consistent, stable shifting in the most demanding trail conditions.
• Shifts under maximum power without compromise: The system maintains chain stability and alignment, even when shifting under full load. This ensures smooth gear changes during climbs or sprints, so riders don’t have to back off power or anticipate terrain.
• Tool-free setup using a “prepare, hang, tighten” process: Installation is simplified by removing the need for limit screws or complex tuning. The result is a faster, more accurate build with fewer variables and less maintenance required.
• Most rebuildable derailleur ever made by SRAM: Designed with serviceable internals and replaceable parts. This reduces long-term ownership cost and ensures the system stays in optimal condition, even after heavy use.
• GX Eagle Transmission Flattop Chain: Engineered for consistent roller spacing and surface contact. This provides smoother chain movement and improved wear resistance, ensuring the drivetrain lasts longer under torque-heavy E-MTB riding.
• Eagle XS-1275 cassette with optimised gear steps: The cassette uses precision-machined steel and intelligent gear progression. It delivers seamless transitions between gears, improving cadence control and pedalling efficiency on all gradients.
• Eagle 90 Single Click shifter: Purpose-built for E-MTBs, this shifter limits each movement to one shift. This reduces chain stress and wear caused by rapid multi-gear changes, extending drivetrain life and maintaining performance over time.
• Eagle 90 Transmission e-MTB crankset: Built for torque-heavy use, the crankset is stiff, durable, and e-bike ready. It ensures direct power transfer to the drivetrain, improving responsiveness and pedalling efficiency.

Built for riders who demand reliability under pressure, the Eagle 90 eMTB Transmission is designed to perform consistently in high-load situations. Shifting doesn’t lag or misfire, even under strain. Its mechanical simplicity doesn’t sacrifice performance. With a serviceable design, it reduces downtime and lowers the cost of ownership. The result is a system made for riders who need durable, dependable shifting—ride after ride.

Performance-focused riders need gear they can trust. This groupset delivers accuracy, toughness, and easy maintenance. All backed by SRAM’s proven Eagle Transmission technology. Take the next step towards a drivetrain that works as hard as you do.

Specification:

• Hangerless Interface (UDH) frame compatibility only
• Distinct black and silver finish
• Available in SRAM/Brose and Bosch specific chainring and crankset offset variants with “Gap Cap” for a seamless between crank and ring. Forged aluminium crank arms available in 160mm, 165mm, 170mm lengths. Includes clip-on guard
• 34t 104bcd variant available without crank arms for compatibility with all other drive unit manufactures
• 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 aluminium lever touchpoint
• Dedicated single-click shift lever variant required for E-MTB use
• 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 with solid pins, fully approved E-MTB use