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Sram Eagle 90 E-MTB BCD groupset
Sram

Sram Eagle 90 E-MTB BCD groupset

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Features of Sram Eagle 90 E-MTB BCD

Product description of Sram Eagle 90 E-MTB BCD groupset

Description summary

Experience mechanical shifting at its best with the SRAM Eagle 90 E-MTB groupset. Leveraging the robust, hangerless Full Mount design from AXS Transmission, it delivers flawless shifting even under full E-MTB power. This groupset features a durable E-MTB crankset, a wide-range 10-52t T-Type cassette, and a premium mechanical shifter. With a revolutionary, guess-free setup and the most rebuildable derailleur SRAM has ever made, Eagle 90 offers an unparalleled ride experience with ultimate durability. For UDH frames only

Mechanical shifting at it’s best. Eagle 90 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 E-MTB crankset, with a drive-unit specific T-Type chainring. 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.

Features:

- Hangerless Interface (UDH) frame compatibility only.
- 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.
- Dedicated single-click variant required for E-MTB use.
- 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.
- Includes GX Eagle Transmission Flattop chain with solid pins, fully approved E-MTB use.

Specifications:

- Rear Derailleur: Eagle 90
- Shifter Right: Eagle 90
- Chainring: 34T
- Guard Included: Yes - Aeroguard
- Chain: GX T-TYPE 126
- Cassette: XS 1275 T-TYPE 10-52

Specifications

Manual

Technical specifications of Sram Eagle 90 E-MTB BCD

  • Cassette

    XS 1275 T-TYPE 10-52

  • Chain

    GX T-TYPE 126

  • Rear Derailleur

    Eagle 90

  • Shifters

    Eagle 90

  • Crankset

    Forged Aluminum E-MTB

  • Color

    Silver

  • Recommended Use

    MTB Cycling

  • Electronic

    No

Features of Sram Eagle 90 E-MTB BCD

Color Silver

Color

Silver

Recommended Use MTB Cycling

Recommended Use

MTB Cycling

Electronic No

Electronic

No

Key differentiators

Designed for durability and serviceability with a forged aluminum crankset and the most rebuildable Eagle derailleur ever made.

Equipped with a wide-range 10-52t T-Type cassette and 34T chainring for versatile gear ratios on varied terrain.

Features a robust, hangerless Full Mount derailleur design for flawless shifting under full E-MTB power.

Includes a GX Eagle Transmission Flattop chain fully approved for the demands of E-MTB use.

Offers a simplified, guess-free setup procedure with no limit screws or b-tension adjustments required.

Technology in Sram Eagle 90 E-MTB BCD groupset

Energy rating

Warnings

/ 5

1 Reviews

What our customers are saying about Sram Eagle 90 E-MTB BCD groupset

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Include AI Generated questions and answers

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

Is the Sram Eagle 90 groupset designed for electric mountain bikes?

Answer of Generated by AI and verified

Yes, this groupset is specifically designed for E-MTB use. It features a durable, forged aluminum E-MTB crankset and a chain that is fully approved for E-MTB applications, ensuring it can handle the additional power and torque.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

Is this an electronic or mechanical shifting groupset?

Answer of Generated by AI and verified

The Sram Eagle 90 is a mechanical groupset. It features a premium mechanical shifter and does not use electronic or wireless shifting components.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

What makes the rear derailleur on this groupset durable?

Answer of Generated by AI and verified

The Eagle 90 rear derailleur is designed for durability with a robust, hangerless Full Mount design. It is also highly rebuildable, featuring replaceable outer and inner parallelogram links, skid plates, and a tool-free threaded cage assembly.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

Is the Sram Eagle 90 E-mtb Bcd Groupset worth the investment for mountain biking?

Answer of Generated by AI and verified

The Sram Eagle 90 E-mtb Bcd Groupset offers a robust mechanical shifting experience with a wide-range 10-52t cassette and durable components, making it a valuable choice for mountain biking users.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

What is the gear range of the cassette included with the Eagle 90 groupset?

Answer of Generated by AI and verified

This groupset includes an XS-1275 T-Type cassette with a wide gear range of 10-52 teeth, providing versatile gearing for varied MTB terrain.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

How many speeds does the Sram Eagle 90 groupset have?

Answer of Generated by AI and verified

This is a 1x12-speed groupset, featuring a single chainring at the front and a 12-speed cassette at the rear.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

What material is the crankset made from?

Answer of Generated by AI and verified

The E-MTB crankset included in this groupset is made from forged aluminum, selected for its sturdiness and durability.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

What technologies does the Sram Eagle 90 groupset feature?

Answer of Generated by AI and verified

This groupset incorporates Sram's Eagle and AXS Transmission technologies, including the hangerless Full Mount design and a T-Type cassette with full X-Sync technology for smooth shifting under load.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

Can I use this groupset for road cycling?

Answer of Generated by AI and verified

We do not recommend this groupset for road cycling. It is specifically designed and optimized for MTB cycling, particularly for E-MTBs, with components built to handle off-road conditions and power.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

Is this groupset designed for shifting under load?

Answer of Generated by AI and verified

Yes, a key feature of the Eagle Transmission system is its ability to provide smooth, flawless shifting even under the full power of an E-MTB. This is made possible by the XS-1275 T-Type cassette with full X-Sync technology.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

What type of frame is required for the Sram Eagle 90 groupset?

Answer of Generated by AI and verified

This groupset is compatible only with frames that feature a UDH (Universal Derailleur Hanger) interface. This is because it uses a hangerless, Full Mount derailleur architecture.

* Generated by AI based on customer and product data

2026-09-06

Generated by AI and verified

Sram Eagle 90 E-MTB BCD groupset

Is the shifter compatible with other brake levers?

Answer of Generated by AI and verified

Yes, the Eagle 90 shift lever features MMX compatibility, which allows for seamless pairing and a tidy cockpit setup with compatible SRAM brakes.

* Generated by AI based on customer and product data

Ask a technical question about this product

Frequently bought together
Best sellers

Use cases

E-Mountain Bike Upgrades 95% Fit

This groupset is specifically designed for E-MTB use, featuring a durable forged aluminum crankset and a chain fully approved for the higher torque of electric mountain bikes. It serves as a solid performance upgrade for riders with UDH-compatible frames seeking reliable mechanical shifting.

Forged Aluminum E-MTB crankset,E-MTB approved chain,UDH frame compatibility,Mechanical shifting

All-Mountain and Trail Riding 90% Fit

With a versatile 1x12-speed drivetrain and a wide 10-52t cassette range, this groupset provides the gearing needed to tackle steep climbs and fast descents common in trail and all-mountain riding. The robust construction ensures durability on varied and challenging terrain.

1x12-speed gearing,10-52t cassette range,Durable aluminum construction

Technical Climbing and Power Sections 85% Fit

The groupset's design, featuring full X-SYNC technology, enables smooth and reliable shifting even under load. This is a significant advantage for E-MTB riders maintaining power through technical climbs or accelerating out of corners.

Full X-SYNC technology,10-52t cassette for climbing gears,Eagle Transmission system

Riders Preferring Mechanical Simplicity 90% Fit

As a high-performance mechanical groupset, this is an ideal choice for experienced riders who prefer the tactile feedback, field serviceability, and independence from batteries that mechanical shifting offers. It provides modern wide-range gearing without the complexity of electronic systems.

Mechanical shifter type,Tool-free threaded cage assembly,Rebuildable derailleur design

Best for

Best for E-MTB Riders

This groupset delivers exceptional shifting performance even under load, thanks to its wide 10-52t gear range and full X-Sync technology, ensuring you maintain momentum and control.

Efficient Gear Shifting: 90%, Precision Shifting & Control: 90%, Versatile Gear Ratios: 90%

A Reliable Upgrade for Regular Trail Riders

With a robust forged aluminum crankset and a rebuildable derailleur, this groupset is built for long-term durability and reliable performance on your regular rides.

Ideal for Mechanical Purists

Featuring a hangerless Full Mount derailleur architecture and MMX compatibility for clean cockpit integration, this groupset offers advanced mechanical design for the discerning cyclist.

Great All-Rounder for Recreational E-Bikers

The combination of a wide gear range and smooth-shifting components makes tackling different trails more enjoyable and less demanding.

Versatile Gear Ratios: 90%

Benefits

FunctionalExperience seamless shifting, even under load

This groupset is engineered for crisp and reliable gear changes. The combination of full X-SYNC technology and a 1x12-speed setup ensures best-in-class inboard and outboard shifting performance, even when you're putting down power.

Shifter type: Mechanical

Shifters: Eagle 90

Technology: AXS

Eagle

FunctionalAchieve a perfect setup without the guesswork

This groupset is designed for a straightforward, guess-free installation process. With no limit screws or b-tension adjustments required, and a tool-free threaded cage assembly, you can get your bike set up and ready to ride more easily.

Tool included: No limit screws

no b-tension

and no guesswork; tool-free threaded cage assembly

Frame compatibility: UDH frames only

Ideal buyer profiles

The E-MTB Rider

This cyclist is dedicated to maximizing their E-MTB's performance on varied and challenging terrain. They prioritize reliable, efficient, and smooth gear changes, especially under the high-torque conditions of an electric mountain bike.

The Sram Eagle 90 E-MTB groupset delivers on these priorities with its 1x12-speed system and wide 10-52t cassette, providing versatile gear ratios for any climb or descent. The full X-SYNC technology ensures smooth, efficient shifting even under power, while the robust forged aluminum crankset and rebuildable Full Mount derailleur offer the durability and reliable performance they demand.

The Mechanic

This rider enjoys the technical aspects of cycling as much as the ride itself. They appreciate well-engineered mechanical systems, value components that are rebuildable and easy to maintain, and prefer a hands-on approach to their bike's setup.

This groupset is ideal for the tech-savvy rider who prefers proven mechanical performance. It features a guess-free, tool-free setup and a rebuildable derailleur with replaceable parts, appealing to their desire for maintenance and longevity. The system's Eagle and AXS technologies, combined with MMX brake compatibility, offer a sophisticated, integrated setup without relying on electronic shifting.

The Recreational E-MTB Rider

This individual enjoys exploring trails on their E-MTB for fitness and fun. They need a dependable groupset that works consistently without requiring constant adjustment, allowing them to focus on the ride and the scenery.

We recommend the Sram Eagle 90 groupset for its dependable and assured performance. The wide 10-52t gear range is perfect for tackling a variety of trails, from steep hills to fast flats, while the smooth mechanical shifting provides a straightforward and reliable user experience. Its durable construction means more time riding and less time on maintenance.

Competitive features

When evaluating the Sram Eagle 90 E-MTB BCD Groupset, it's essential to understand its specific focus on mechanical performance for electric mountain bikes. Unlike many alternatives that prioritize electronic shifting, this groupset champions the reliability and serviceability of a mechanical system, enhanced with modern design principles for high-load E-MTB applications. It leverages the robust, hangerless Full Mount design, ensuring precise shifting even under the full power of an e-bike motor. This positions it as a unique option for riders who value durability and hands-on maintenance over electronic features.

Where it excels

The Eagle 90 groupset is engineered specifically for the demands of E-MTB use, providing flawless mechanical shifting even under full motor power, a scenario where other systems might struggle. Built with a focus on durability and serviceability, it features what SRAM describes as its most rebuildable derailleur, with replaceable links and a tool-free cage assembly, making it a practical choice for long-term use and field repairs.

Consider alternatives if...

Riders seeking the latest technological advancements, such as electronic shifting, wireless connectivity, or app-based customization, will find this mechanical groupset lacking. Competitors like the SRAM GX AXS upgrade kits offer a direct path to electronic performance, which this model does not provide.

Verdict

The Sram Eagle 90 E-MTB BCD Groupset is a purpose-built solution for E-MTB riders who prefer the tactile feedback and proven reliability of mechanical shifting. Its strength lies in its robust construction and serviceability, designed to withstand the high torque of electric-assist riding. While it forgoes the electronic features found in many modern high-end groupsets, it delivers exceptional durability and consistent performance, making it a compelling choice for a specific type of rider.

Specs comparison

Favorite On Favorite Off
Favorite On Favorite Off
MaterialAluminumforged aluminum and steelforged aluminum
Intended UseMTB CyclingMTB CyclingMTB Cycling
ChainGX T-TYPE 126GX Eagle 126 LinksGX Eagle Transmission Flattop
Rear DerailleurEagle 90GX Eagle Type 3 12sEagle 90
CassetteXS 1275 T-TYPE 10-52Eagle Xg-1275 10-52tXS 1275 T-Type 10-52
Derailleur ClutchYesYes-
CranksetForged Aluminum E-MTBG X Eagle Dub 32tForged Aluminum E-MTB Crankset
ElectronicNoNoNo
Tool IncludedNo limit screws, no b-tension, and no guesswork; tool-free threaded cage assemblyChain gap adjustment tool-
Guard IncludedYes-Yes - Aeroguard

Specs vs competitors

Favorite On Favorite Off
Favorite On Favorite Off
MaterialAluminumaluminumsteel
Intended UseMTB CyclingMTB CyclingMTB Cycling
ChainGX T-TYPE 12612-speed12-speed
Rear DerailleurEagle 90Shimano-
ElectronicNoYesYes
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