SRAM S100, S200, S500
The new guide to understanding your drivetrain
Clarity in the service of performance
For years, SRAM range names (SX, NX, GX, X01) have accompanied some of the greatest victories on trails around the world. In 2026, SRAM takes another step forward, radically simplifying its catalogue so you can see performance levels at a glance.
Eagle S-Series takes the older Eagle and Eagle AXS ranges forward with three levels: S100, S200 and S500 — creating a simplified, compatible drivetrain ecosystem.
Why the change?
The world of mountain biking is evolving: full integration, AXS electronic shifting and extreme "Full Mount" durability. To keep pace with these technological advances, SRAM is adopting a universal number-based system. No more deciphering complex initials: the higher the number, the higher the range, with lighter weight and greater precision.
What does this mean for you?
Whether you’re a competitor chasing the ultimate weight saving with the S500 series, a regular rider who demands the legendary reliability of the S200 series, or a newcomer discovering the trails with the S100 series, this new hierarchy was designed for you.
Expert tip: Most S200 and S500 components share the same ecosystem.
Feel free to mix the series to make the most of your budget: pair a robust S200 derailleur with an S100 shifter to reduce costs, or a tough S100 derailleur with an S200 shifter to save weight.
Your entry point to SRAM performance
S100 series
The S100 series was designed for those taking their first steps into 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’s a robust, easy-to-maintain drivetrain, ideal
for leisure rides and more demanding outings. It offers exemplary
reliability for riders who want a simple, effective bike ready to tackle any
climb without worrying about adjustments.
At the heart of enduro and trail performance
S200 SERIES
A direct descendant of the legendary GX groupset, the S200 series is a true
"best-seller" among enthusiasts. It’s the smart choice for
riders who cover plenty of miles and need kit that can take
impacts without missing a beat. Combining durability and precision, the S200 range
often features the latest innovations, such as electronic AXS technology. It’s
the perfect compromise: light enough for racing, yet tough enough
for full days at the bike park or demanding rides in the{br>mountains. It’s the benchmark for reliability among regular riders.
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
demonstrates surgical precision. Using premium materials such as
carbon fibre, titanium and ultra-light alloys, the
S500 is designed for competitors and owners of exceptional
bikes. Equipped with cutting-edge technologies (such as the Full Mount
T-Type system), it offers phenomenal impact resistance and smooth
shifting, even under maximum load on a climb. It’s the ultimate{br>weapon for cross-country, high-level enduro and the most
premium bikes on the market.
Frequently asked questions
What’s happening to my favourite ranges (SX, NX, GX, X01, XX1)?
Don’t worry, the Eagle spirit remains the same! SRAM has simply streamlined the
names to make the range easier to understand:
S100: The new entry-level standard. More robust and easier to adjust than the old SX.
S200: The successor to GX. The versatile choice offering the best performance for the price on the market.
S500: Your entry point to AXS electronic shifting for frames that aren’t compatible with the new UDH system. You get wireless precision at a highly competitive price.
Is SRAM discontinuing classic Eagle drivetrains?
Not at all! SRAM knows that not everyone has a latest-generation
UDH-compatible frame. The S100, S200 and S500 series are here to
keep your current bikes going. They’re ideal for modernising a "mullet" setup (29" front wheel / 27.5" rear wheel) or replacing a damaged component on an existing 12-speed drivetrain.
Can I mix the new S-Series components with my older Eagle parts?
Yes, they’re fully compatible!
The S100, S200 and S500 series are all 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 old GX shifter with a new S200 derailleur without any problems.
Can I mix S-Series components with the new "Transmission" (T-Type) groupsets?
Be aware: generally, the answer is no. The S-Series range (Drivetrain) and the Transmission range (T-Type / 70 / 90) use different cable-pull ratios.
You must use an Eagle Drivetrain shifter with an Eagle Drivetrain derailleur (S100, S200, S500).
The only exception: Eagle Transmission cranksets can be fitted to a bike equipped with S-Series components (Boost 148 mm spacing), but the reverse isn’t possible because of the tooth profile.
Our advice: For optimum performance and warranty cover, don’t mix these two ecosystems.
What is the S100 derailleur’s "UDH Half Mount" system?
It’s a hybrid innovation! If your frame is UDH-compatible, the S100 derailleur rests against the hanger to provide better impact protection than a conventional setup.
It’s stronger than a standard hanger.
Note: unlike "Full Mount" (S-Series 70/90), you still need the limit screws and B-tension screw to adjust it.
In short, which groupset should I choose?
- Want wireless electronic shifting on a standard frame? S500 AXS.
- Looking for the best balance of reliability and price for everyday riding? S200.
- Rebuilding a bike on a tight budget but want something tough? S100.
Can I fit the "UDH Half Mount" bracket to my current derailleur (GX, X01, AXS)?
No. This technology is exclusive to the S100 model.
Because of structural differences in the bolts and upper pivot, the Half Mount system cannot be fitted to older ranges or the S200/S500 series.
Good to know: If your S100 derailleur didn’t come with Half Mount, you can upgrade your setup using the official spare part (ref: 11.7518.120.000), provided your frame is UDH-compatible.
Can I upgrade my current Eagle groupset to the new "Transmission" system one component at a time?
Unfortunately not.
The Eagle Transmission system (T-Type) uses a radically different architecture (no derailleur hanger, with direct axle mounting). A partial upgrade isn’t possible (for example, keeping your old cassette with a Transmission derailleur). Switching to this technology requires a complete changeover.
My bike isn’t UDH-compatible. Do I have to change frames?
Absolutely not! That’s exactly what the new S-Series range is for. SRAM designed the S100, S200 and S500 series so owners of bikes with standard derailleur hangers can keep riding with a modern, high-performing and reliable drivetrain for many years to come.
What’s the difference in adjustment between Half Mount (S100) and Full Mount?
This is an important technical point:
- Full Mount (high-end Transmission): No limit screws are needed.
- Half Mount (S100): Although the UDH interface provides greater protection, it still requires conventional adjustment using the limit screws and B-tension screw to work perfectly.
Workshop tip: If you have a UDH-compatible frame but don’t want to invest in a complete "Transmission" groupset, the S100 derailleur with the Half Mount option is currently the best compromise: you get the strength of the UDH interface while retaining the simplicity of the classic Eagle ecosystem!
What practical improvements do S-Series components offer?
Beyond the name, SRAM has revised several key features to improve your experience on the trail:
- Shorter cranks: In line with the current trend (better ground clearance and ergonomics), S100 and S200 cranksets are now available in lengths from 155 mm to 175 mm
- New HG cassette: The PG-1210 cassette becomes the go-to option for standard freehub bodies (HG), offering a robust and reliable 11-to-50-tooth range
- Coordinated finish: The designs have been unified, so you can pair an S200 crankset with an S500 derailleur while keeping your bike’s look consistent.
- Improved S100 durability: The S100 derailleur has been reinforced to offer far greater durability than previous entry-level models.
What is the "Stealth" design on the new S100 and S200 shifters?
The Stealth design was developed to tidy up your cockpit. The shifters are positioned so the gear cable runs parallel to the brake hose. The result: a cleaner, more modern and better-integrated cockpit.
Are the S-Series shifters more comfortable?
Yes. With this launch, SRAM has brought the ergonomic advances of its high-end groupsets (70/90) to the S100 and S200 shifters:
- Longer levers: Shifting takes less effort.
- Shorter lever travel: Your thumb has less distance to move when changing gear, helping you keep a firmer grip on the handlebars through technical sections.
- Adaptability: The ergonomics have been redesigned to suit hands of all sizes, from the smallest to the largest.
Can I match my gear shifter to my dropper post remote?
Absolutely. The new S100 and S200 shifters share the same design language as SRAM’s mechanical dropper post remotes. This gives your cockpit a more consistent look and feel.
