SRAM Eagle 90 eMTB Bosch Transmission Groupset

Built with Full Mount derailleur architecture, the SRAM Eagle 90 eMTB Bosch Transmission Groupset delivers maximum strength and precise mechanical shifting. Its rebuildable design includes replaceable links, skid plates, and a tool-free cage assembly for easy maintenance and long-term durability. The forged aluminium E-MTB crankset with a T-Type chainring ensures solid power transfer. Pair that with a double-click T-Type shifter and X-SYNC cassette, and you get crisp, consistent shifts—even under heavy load.

Key Features and Benefits:

• Full Mount derailleur architecture: Anchors the derailleur to both sides of the frame using the hangerless UDH interface. This creates a stiffer, more secure fit, ensuring improved shifting precision and resistance to trail impacts.
• Replaceable derailleur components: Outer and inner parallelogram links, bash guards, bushings, and the cage assembly can all be swapped out. This reduces long-term service costs and extends product lifespan.
• Tool-free threaded cage assembly: Allows for quick and simple maintenance without needing special tools. This enables fast repairs or part swaps on the go, minimising downtime.
• Forged aluminium crank arms: Available in multiple lengths (160mm, 165mm, 170mm) to suit rider preference. The forged build boosts stiffness and reliability, providing stable power delivery under load.
• T-Type chainring specific to drive unit: Matches the Bosch motor system for an integrated drivetrain connection. This ensures smoother torque transfer and reduces wear on drivetrain components.
• XS-1275 10-52T T-Type cassette with full X-SYNC: Features wide gear range and advanced tooth profile for consistent inboard and outboard shifts under load. Riders get smoother, more reliable shifting across all terrain types.
• Single-click T-Type mechanical 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.
• Simple four-step setup (Prepare. Hang. Tighten. Route): No limit screws or b-tension needed. Setup is straightforward and eliminates guesswork, reducing install time and tuning errors.

Shifting performance is the main priority for riders choosing this groupset. The Eagle 90 delivers consistent, reliable shifting under load—without electronics. Its mechanical system is purpose-built for e-MTBs, designed to handle torque from powerful drive units. With X-SYNC chain control, T-Type compatibility, and a frame-integrated Full Mount design, the system remains aligned and secure during aggressive riding. The build quality and serviceability ensure long-term performance without the complexity of electronic systems.

This groupset was designed for riders who want dependable performance, smooth shifting, and simple service—all in a robust mechanical package. SRAM Eagle 90 gives you the ride quality and drivetrain stability needed for every ride ahead.

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