SRAM Eagle 90 EMTB Groupset with Brose Crank, GX Chain & XS-1275 Cassette 10-52T

The SRAM Eagle 90 Groupset EMTB combines cutting-edge mechanical shifting technology with unparalleled durability and ease of maintenance, engineered specifically for e-mountain bikes. Designed with the same robust Full Mount derailleur architecture found in SRAM’s AXS Transmission lineup, this groupset delivers precision shifting performance that stands up to the toughest trail conditions. Its innovative design includes replaceable outer and inner parallelogram links, skid plates, and a tool-free threaded cage assembly, making it the most rebuildable derailleur SRAM has ever crafted. The forged aluminum E-MTB crankset features a drive-unit specific T-Type chainring, optimized for power transfer and reliability.

With the Eagle 90, shifting under load becomes effortless thanks to the XS-1275 T-Type cassette, which incorporates full X-Sync technology for smooth gear transitions even in the most demanding terrain. The premium double-click T-Type Actuation mechanical shifter offers intuitive control, making it perfect for riders who value precision and responsiveness. Setup is straightforward with a revolutionary four-step process: Prepare, Hang, Tighten, and Route—eliminating the need for limit screws or guesswork. This groupset is designed to push your limits and enhance your riding experience, delivering a smooth, reliable, and powerful drivetrain for your e-mountain biking adventures.

What It’s Good For

• Exceptional mechanical shifting precision tailored for e-MTB applications.
• Highly durable construction with easily replaceable derailleur components for long-term maintenance.
• Effortless shifting under load, even on steep climbs and technical terrain.
• Compatibility with Hangerless Interface (UDH) frames, ensuring seamless integration.
• Lightweight forged aluminum crankset designed for optimal power transfer and efficiency.
• Simple and tool-free installation and adjustment, reducing setup time and complexity.
• Includes GX Eagle Transmission Flattop chain, fully approved for E-MTB use, enhancing drivetrain longevity.
• Shift lever designed with modern ergonomics and premium materials for comfortable and reliable control.

What It’s NOT Good For

• Not compatible with non-UDH frame designs.
• Not intended for riders who require electronic shifting systems.
• Does not include front derailleur or brake components; these must be sourced separately.
• Not suitable for riders looking for integrated battery or bike computer features.
• Not designed for casual or road cycling applications; optimized exclusively for e-MTB performance.

Frequently Asked Questions

Is the SRAM Eagle 90 Groupset compatible with all e-MTB motors?
It is compatible with Bosch and Brose drive unit specific chainring and crankset offset variants, and also offers a 34t 104bcd variant without crank arms for compatibility with other drive unit manufacturers.

Can I perform maintenance on the derailleur myself?
Yes, the Eagle 90 derailleur is designed to be the most rebuildable in SRAM’s Eagle Transmission series, featuring replaceable parts like B-Knuckle, links, bash guards, bushings, and cage assembly, all without needing specialized tools.

What makes the shifting performance under load so effective?
The combination of the XS-1275 T-Type cassette with full X-Sync technology and the double-click T-Type Actuation mechanical shifter enables smooth and reliable shifts even under high torque conditions typical of e-MTB riding.

Does the groupset include brakes or rotors?
No, the SRAM Eagle 90 Groupset does not include brake or rotor components; these need to be purchased separately based on rider preference and compatibility.