SRAM Simplifies the Eagle Drivetrain: Say Hello to the New S-Series!

If you've been riding mountain bikes over the last decade, you’re undoubtedly familiar with SRAM’s iconic Eagle Drivetrain ecosystem. For years, riders have navigated an alphabet soup of drivetrain tiers—from the entry-level SX and NX to the mid-tier GX, and the top-tier X01 and XX1.

But picking the right upgrade or replacement parts is about to get a whole lot easier. SRAM has officially announced they are consolidating and refining their legacy 1x drivetrain lineup into the brand-new SRAM Eagle Drivetrain S-Series.

Here is everything you need to know about SRAM’s streamlined approach to wide-range gearing:

The Breakdown: S100, S200, and S500

To make upgrading, replacing, or mixing and matching components simpler than ever, SRAM has broken the S-Series down into three distinct, easy-to-understand levels:

• Eagle S100: This is your new entry point into reliable, wide-range mechanical shifting. Built with a major focus on durability and system integrity, the S100 is fully E-MTB ready. It also introduces the "UDH Half Mount" derailleur design to provide extra robustness against trail impacts and knocks. It gives you everything you need and nothing you don't.

• Eagle S200: For the rider looking for high-performance mechanical shifting without the premium price tag. S200 is essentially a "greatest hits" collection of mechanical Eagle components, offering competitive weights, robust durability, and crisp shifting to elevate any trail bike.

• Eagle S500 AXS: As the flagship of the new S-Series, S500 brings the flawless power of wireless AXS shifting to the masses. Built with premium materials and exclusive finishes, it’s ready for MTB, E-MTB, or even gravel.

Why We Love the Change

1. The Freedom to Mix and Match (Mullet Builds!) Because the S-Series plays perfectly within the AXS ecosystem, you can get creative. Want to build the ultimate drop-bar gravel crusher? You can pair eTap AXS drop-bar levers with an S500 Eagle AXS rear derailleur and a massive 10-52T cassette for the ultimate "business up front, party in the back" mullet setup.

2. E-MTB Ready Across the Board SRAM knows that E-MTBs put a lot of torque and stress on drivetrain components. Every level of the S-Series is built to handle the heavy, long-term loads of E-MTB riding in all conditions.

3. Less Confusion, More Riding By removing the complexity of their older naming conventions, SRAM is letting riders focus on what actually matters: the ride. Whether you need a quick replacement part for an older bike or want to fully modernize your rig, the S-Series replacement matrix makes finding compatible parts totally foolproof.

The Bottom Line The original promise of SRAM’s 1x system was to remove complexity. The new S-Series stays true to that ethos. It keeps the massive gear range, quiet performance, and legendary durability of the original Eagle, but wraps it all up in a modern, simplified package