Already on Eagle 90/70? SRAM's GX AXS Upgrade Kit Makes Wireless Shifting Easier

Just six weeks after SRAM reinvigorated the discussion around mechanical shifting with its Eagle 90 and Eagle 70 drivetrains, the component giant is offering a compelling wireless upgrade path. For riders who were drawn to the robust design of the new mechanical Eagle Transmission but ultimately prefer the clean setup and precision of electronic shifting, SRAM has announced the GX Eagle AXS Transmission Upgrade Kit, available this May 2025.

This intelligently designed kit caters specifically to cyclists already running the latest Eagle 90 or Eagle 70 mechanical T-Type drivetrains. It provides a streamlined and potentially more cost-effective way to transition to SRAM's acclaimed AXS wireless ecosystem without requiring a complete groupset overhaul.

What’s in the Box and What Do You Re-Use?

The GX Eagle AXS Transmission Upgrade Kit includes the core components needed to go cable-free:

• GX Eagle AXS Transmission Derailleur Body: This is the heart of the wireless system, featuring a black anodized aluminum construction. It maintains the same 52T maximum cassette capacity as existing GX Transmission components and weighs in at a respectable 235 grams.
• AXS Pod Controller: The ergonomic and customizable shifter unit.
• AXS Battery and Charger: To power the derailleur.
• T-Type PowerLock Link: For seamless chain integration.

Crucially, to facilitate the upgrade and manage costs, riders will re-use the derailleur cage and mount bolt from their existing Eagle 90 or Eagle 70 mechanical derailleur. SRAM describes this as a "disassemble, upgrade, reassemble" process, making it an attractive DIY project for many home mechanics.

Compatibility is Key: Understanding the T-Type and UDH Requirement

It's vital for interested riders to understand the compatibility constraints. This upgrade kit is exclusively for T-Type systems. This means:

1. Your frame must be UDH (Universal Derailleur Hanger) compatible to support SRAM’s hangerless interface.
2. You must already have a T-Type chain, T-Type cassette, and T-Type crankset installed on your bike.

This kit will not work with older, non-UDH frames or any Eagle drivetrains that are not part of the T-Type generation. Riders with conventional derailleur hangers or non-T-Type components will need to explore other options within SRAM's extensive AXS lineup.

A Cost-Effective Leap to Wireless?

While specific global pricing, including Canadian MSRP, was not fully detailed at the initial announcement, the GX Eagle AXS Transmission Upgrade Kit is positioned as a "lower-cost entry" into SRAM's wireless shifting platform. By leveraging components riders may already own (like the cage, mount bolt, cassette, chain, and crankset), the initial outlay for wireless performance is significantly reduced compared to purchasing a full AXS groupset.

This modular approach signals SRAM's understanding that some riders adopted the new mechanical T-Type systems for their robustness and updated design but held a preference for wireless actuation. This kit directly serves that demographic, offering the performance of AXS without the necessity of replacing an entire, recently acquired drivetrain.

The Takeaway

For the cyclist already invested in SRAM's latest mechanical Eagle T-Type platform and equipped with a UDH-compatible frame, the GX Eagle AXS Transmission Upgrade Kit presents a logical and financially savvy next step. It’s a direct pathway to the refined performance and clean aesthetics of wireless shifting, embracing a DIY-friendly, modular upgrade philosophy. As of May 2025, this kit is set to provide a welcome option for those ready to cut the cord on their modern Eagle Transmission setup.