Overview and Specifications of WheelTop's Affordable Electronic Groupset "EDS"
This article summarizes the features and specifications of the budget-friendly electronic groupset "EDS" newly released by the Chinese manufacturer WheelTop.
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SRAM Component Grades and Compatibility Summary for MTB
Modified at: Mar 28, 2025
Posted at: Mar 20, 2023
This section summarizes the grades, features, and compatibility of SRAM's Eagle series of components for MTB, as well as the electric component AXS and the latest component, Eagle Transmission.
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Compatibility Guide for SRAM MTB Components
A detailed explanation of compatibility between SRAM MTB components. This guide outlines which parts can be used together and which combinations are not compatible.
Eagle Collection
SRAM’s MTB components were once structured under series like XX, X.0, X.9, X.7, X-5, X.4, and X.3. However, with the launch of the XX1 Eagle in 2016, the entire MTB lineup was rebranded under the “Eagle Collection.”
As a result, all current SRAM MTB components now carry the Eagle name and are 12-speed, front-single drivetrain systems.
The Eagle Collection is divided into five tiers, ranging from the top-end XX1 (optimized for cross-country) and X01 (for enduro) to the entry-level SX. The top three tiers—XX1, X01, and GX—also offer AXS, SRAM’s wireless electronic shifting system.
AXS corresponds to the eTap AXS in SRAM’s road component lineup. The lower-end models, NX Eagle and SX Eagle (commonly found on budget complete bikes), do not feature wireless shifting options.
| Series | Target Use | Speeds |
|---|---|---|
| XX1 Eagle AXS | Cross-country | 12-speed |
| XX1 Eagle | Cross-country | 12-speed |
| X01 Eagle AXS | Enduro | 12-speed |
| X01 Eagle | Enduro | 12-speed |
| GX Eagle AXS | Mid-grade | 12-speed |
| GX Eagle | Mid-grade | 12-speed |
| NX Eagle | Entry-level | 12-speed |
| SX Eagle | Entry-level | 12-speed |
All SRAM Eagle series MTB drivetrains follow a “1x12” configuration, meaning a single front chainring and a 12-speed rear cassette. This setup delivers the modern MTB trend of a wide gear range with simplified shifting, regardless of grade.
The SX Eagle is especially popular on entry-level MTB complete bikes, as it brings 12-speed performance to budget-friendly setups.
Meanwhile, high-end MTB bikes are increasingly offered with Eagle AXS groupsets, giving buyers a choice between SRAM AXS and Shimano Di2 for their wireless shifting preferences.
Eagle Transmission Collection
On March 22, 2023, SRAM launched a new generation of MTB wireless drivetrain systems under the name Eagle Transmission.
Eagle Transmission introduced several key upgrades, including:
- A new UDH (Universal Derailleur Hanger)-based mounting system that eliminates traditional derailleur hangers.
- The innovative T-Type derailleur system, designed specifically for UDH frames.
- Simplified setup through a dedicated mobile app.
- Enhanced wireless shifting performance.
At launch, only wireless (electronic) shifting models were available. However, in March 2025, SRAM added mechanical drivetrain options named EAGLE 90 and EAGLE 70, expanding the lineup.
The Eagle Transmission tiers include:
- XX SL – ultra-lightweight, top-tier for cross-country
- XX – premium-grade for enduro
- X0 – rugged and durability-focused
- GX – more affordable, high-performance wireless
- 90 / 70 – new mechanical transmission options
Importantly, Eagle Transmission components (such as cassette and chain) are not compatible with previous Eagle drivetrains. These are dedicated, Transmission-specific parts.
| Series | Target Use | Shifting | Speeds |
|---|---|---|---|
| XX SL Eagle AXS Transmission | Cross-country | Wireless | 12-speed |
| XX Eagle AXS Transmission | Enduro | Wireless | 12-speed |
| X0 Eagle AXS Transmission | Mid-grade | Wireless | 12-speed |
| GX Eagle AXS Transmission | Mid-grade | Wireless | 12-speed |
| EAGLE 90 Transmission | Top-grade | Mechanical | 12-speed |
| EAGLE 70 Transmission | Mid-grade | Mechanical | 12-speed |
While electronic and mechanical shifting components cannot be mixed (e.g., derailleur and shifter), other drivetrain components like the crankset, chain, and cassette can be shared across all Eagle Transmission models, regardless of shifting type.
Brake Series
Apart from the main component series, SRAM has a dedicated brake series lineup.
These are only available with braking systems and no drivetrain components such as shifters or crankshafts.
Pre-2025 Brake Lineup
Until the March 2025 rebranding, SRAM’s MTB brake range included four distinct series based on braking characteristics:
- Code
- DB
- G2
- Level
Each of these included both brake levers and disc brake calipers, catering to different riding styles and needs.
Post-2025 Rebranding
In March 2025, SRAM overhauled its MTB brake lineup, consolidating it into three core series under a new branding scheme:
- MOTIVE series and DB series: Designed for heavy-duty use, such as cross-country (XC) and trail riding.
- MAVEN series: Aimed at extreme-duty applications like downhill and enduro riding.
Key Upgrade: Mineral Oil
One of the biggest changes with the new brake series is the switch from DOT brake fluid (used in SRAM’s legacy systems) to mineral oil — a fluid type also used by Shimano and favored for its longevity and ease of maintenance.
This update reflects SRAM’s move toward greater reliability, environmental friendliness, and compatibility with industry-standard maintenance practices.