SRAM S100, S200, S500
The new guide to understanding your drivetrain
Clarity at the service of performance
For years, SRAM range names (SX, NX, GX, X01) have accompanied the greatest victories on trails around the world. In 2026, SRAM takes a new step by radically simplifying its catalogue to give you an instant read on performance.
Eagle S-Series evolves the former Eagle and Eagle AXS into three levels: S100, S200 and S500 — creating a simplified and compatible drivetrain ecosystem.
Why this change?
The world of mountain biking is evolving: full integration, AXS electronic shifting and extreme "Full Mount" robustness. To keep pace with these technological revolutions, SRAM now adopts a universal numerical system. No more deciphering complex acronyms: the higher the number, the higher you move up the range in terms of weight savings and precision.
What changes for you?
Whether you're a competitor seeking the ultimate weight savings with the S500 series, a regular rider demanding the legendary reliability of the S200 series, or a newcomer discovering the trails with the S100 series, this new hierarchy has been designed with you in mind.
Expert tip: Most S200 and S500 components share the same ecosystem.
Don't hesitate to mix series to optimise your budget: an S200 derailleur for robustness paired with an S100 shifter to cut costs, or an S100 derailleur for robustness and an S200 shifter for weight savings.
Access to SRAM performance
S100 Series
The S100 series was designed for those taking their first steps in the
world of mountain biking, or for cyclists whose priority is value
for money. Replacing the well-known SX and NX groupsets, the S100 range
benefits from SRAM's full technological heritage in 1x12 shifting.
It is a robust and easy-to-maintain drivetrain, ideal
for leisure rides and sporting tours. It offers exemplary reliability for those
who want a simple, efficient bike ready to tackle any climb
without worrying about setup.
The heart of Enduro and Trail performance
S200 SERIES
The direct heir to the legendary GX groupset, the S200 series is the true
"best-seller" for enthusiasts. It's the strategic choice for
riders who ride a lot and demand kit that can take the hits without
flinching. Combining durability and precision, the S200 range often integrates
the latest innovations such as AXS electronic technology. It's
the perfect compromise: light enough for competition, yet robust enough
for full days in the Bike Park or committed mountain raids.
It is the benchmark for reliability for the regular rider.
Excellence without compromise
S500 SERIES
The S500 series represents the pinnacle of SRAM engineering, succeeding the
prestigious X01 and XX1 ranges. Here, every gram counts and every gear
change is a demonstration of surgical precision. Using premium materials
such as carbon, titanium and ultra-light alloys, the S500 is aimed at
competitors and owners of exceptional machines.
Equipped with cutting-edge technologies (such as the Full Mount
T-Type system), it offers phenomenal impact resistance and smooth gear
shifting even under maximum load on steep climbs. It is the ultimate
weapon for Cross-Country, high-level Enduro and the most premium bikes
on the market.
Frequently asked questions
What happens to my favourite ranges (SX, NX, GX, X01, XX1)?
Rest assured, the Eagle spirit remains the same! SRAM has simply streamlined the
"naming" to make the range easier to read:
S100: The new entry-level standard. More robust and easier to set up than the old SX.
S200: The successor to GX. It's the versatile choice offering the best performance-to-price ratio on the market.
S500: The gateway to AXS electronics for frames that are not compatible with the new UDH system. You get wireless precision at an ultra-competitive price.
Is SRAM discontinuing classic Eagle drivetrains?
Not at all! SRAM is aware that not everyone has a latest-generation frame
compatible with UDH. The S100, S200 and S500 series are here to
keep your current bikes going. It's the ideal solution for modernising a "Mullet" build (29" wheel up front / 27.5" at the rear) or for replacing a damaged component on an existing 12-speed drivetrain.
Can I mix the new S-Series components with my existing Eagle parts?
Yes, compatibility is total!
The S100, S200 and S500 series are an integral part of the 12-speed Eagle ecosystem.
- S200 and S500 derailleurs: Compatible with all Eagle cassettes in the catalogue.
- S100 derailleur: Compatible with 11-50t and 10-50t cassettes.
- Shifters: You can use your existing GX shifter with a new S200 derailleur without any issues.
Can I mix the S-Series with the new "Transmission" groupsets (T-Type)?
Be aware, the answer is broadly no. The S-Series (Drivetrain) range and the Transmission (T-Type / 70 / 90) range use different cable pull ratios.
You must use an Eagle Drivetrain shifter with an Eagle Drivetrain derailleur (S100, S200, S500).
One exception: Eagle Transmission cranksets can be fitted on a bike equipped with S-Series components (Boost 148mm chainline), but the reverse is not possible due to the tooth profile.
Our advice: For optimal performance and warranty coverage, do not mix these two ecosystems.
What is the "UDH Half Mount" system on the S100 derailleur?
It's a hybrid innovation! If your frame is UDH compatible, the S100 derailleur uses the hanger to provide superior impact protection compared to a standard mount.
It's more solid than a standard hanger.
Note: unlike the "Full Mount" (S-Series 70/90), you still need the limit and B-tension screws to set it up.
If I had to sum it up, which groupset should I choose?
- Want wireless electronics on a standard frame? S500 AXS.
- Looking for the best reliability-to-price ratio for everyday riding? S200.
- Building up a bike on a tight budget but want something solid? S100.
Can I fit the "UDH Half Mount" adapter to my current derailleur (GX, X01, AXS)?
No. This technology is exclusively reserved for the S100 model.
Due to structural differences in the hardware and upper pivot, the Half Mount system cannot be adapted to older ranges or to the S200/S500 series.
Good to know: If your S100 derailleur did not come with the Half Mount fitted as standard, you can upgrade your build with the official spare part (ref: 11.7518.120.000), provided your frame is UDH compatible.
Is it possible to upgrade my current Eagle groupset to the new "Transmission" system piece by piece?
Unfortunately not.
The Eagle Transmission system (T-Type) is based on a radically different architecture (no derailleur hanger, direct axle mounting). It is not possible to carry out a partial upgrade (for example, keeping your existing cassette with a Transmission derailleur). A complete transition is required to move to this technology.
My bike isn't UDH compatible — am I forced to change my frame?
Absolutely not! That is precisely the purpose of the new S-Series range. SRAM designed the S100, S200 and S500 series to allow owners of bikes fitted with standard derailleur hangers to keep riding with a modern, high-performing and reliable drivetrain for many years to come.
What is the difference in setup between the Half Mount (S100) and the Full Mount?
This is an important technical point:
- Full Mount (High-end Transmission): No limit screws required.
- Half Mount (S100): Although it offers enhanced protection via the UDH interface, it still requires classic adjustment using the limit and B-tension screws to work perfectly.
Workshop tip: If you have a UDH-compatible frame but don't want to invest in a full "Transmission" groupset, the S100 derailleur with the Half Mount option is the best current compromise: you benefit from the robustness of the UDH interface while retaining the simplicity of the classic Eagle ecosystem!
What are the concrete improvements on S-Series components?
Beyond the name, SRAM has revisited several key points to improve your experience on the trail:
- Shorter cranks: To meet current trends (better ground clearance and ergonomics), the S100 and S200 cranksets are now available in sizes ranging from 155 mm to 175 mm.
- New HG cassette: The PG-1210 cassette becomes the reference for standard freehub bodies (HG), offering a robust and reliable 11-50t range.
- Harmonised finish: The designs have been unified so you can mix an S200 crankset with an S500 derailleur while keeping a visually cohesive bike.
- S100 robustness: The S100 derailleur has been reinforced to offer significantly greater durability than previous entry-level models.
What is the "Stealth" design on the new S100 and S200 shifters?
The Stealth design was conceived to clean up your cockpit. The shifters are oriented so that the cable routing runs parallel to the brake hose. The result: a neater, more modern and better-integrated cockpit.
Are the S-Series shifters more comfortable?
Yes. SRAM took advantage of this launch to bring the ergonomic advances from the high-end groupsets (70/90) to the S100 and S200 shifters:
- Longer paddles: Gear changes require less effort.
- Reduced throw: The thumb travels a shorter distance to change gear, allowing you to maintain a better grip on the handlebar in technical sections.
- Adaptability: The ergonomics have been reworked to suit all hand sizes, from the smallest to the largest.
Can I match my gear shifter with my dropper post lever?
Absolutely. The new S100 and S200 shifters share the same aesthetic language as SRAM's mechanical telescopic dropper post levers. Your cockpit gains in visual consistency and ergonomics.
