Description

SRAM Eagle S100 12 Speed Rear Derailleur Mechanical – Replaces SX & NX Eagle

SRAM Eagle S100 12 Speed Rear Derailleur

Upgrade your mountain bike with the latest evolution of SRAM’s legendary Eagle drivetrain. The SRAM Eagle S100 12 Speed Rear Derailleur has been developed from more than a decade of Eagle innovation, delivering crisp, dependable shifting, improved durability and compatibility with the latest frame standards.

Whether you’re replacing a worn SRAM SX Eagle derailleur, upgrading from NX Eagle, or building a new 12-speed mountain bike, the Eagle S100 offers exceptional value without compromising on performance.

Designed for 12-speed mechanical Eagle drivetrains, the S100 works seamlessly with SRAM Eagle X-Actuation shifters and wide-range Eagle cassettes up to 50 teeth, giving you smooth, accurate shifting whether you’re climbing steep technical trails or descending at speed.

Available in both the traditional Standard Mount version and the latest Half Mount design for UDH (Universal Derailleur Hanger) frames, the Eagle S100 brings many of the advantages of SRAM’s Transmission platform to conventional mechanical drivetrains.

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🚵‍♂️ What is the SRAM Eagle S100?

The SRAM Eagle S100 is SRAM’s newest mechanical 12-speed rear derailleur, designed to replace the outgoing SX Eagle and NX Eagle models.

Rather than simply refreshing the appearance, SRAM has redesigned key areas of the derailleur to improve long-term reliability and shifting precision.

Improvements include:

• Improved internal bushing fitment for longer-lasting accuracy
• Enhanced durability for regular trail riding
• Better impact resistance
• Available with the innovative Half Mount interface for compatible UDH frames
• Proven Drag Spring clutch technology for excellent chain control

The result is a rear derailleur that’s easier to live with, lasts longer and delivers the consistent shifting Eagle riders have come to expect.

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⚙️ Why Choose SRAM Eagle?

SRAM’s Eagle platform has become one of the world’s most popular mountain bike drivetrains for good reason.

Designed specifically around 1x drivetrains, Eagle provides an enormous gear range without the complexity of a front derailleur.

Benefits of the Eagle platform include:

✅ Wide gear range for steep climbs and fast descents

✅ Reliable 12-speed shifting

✅ Simple 1x drivetrain with fewer components to maintain

✅ Excellent chain retention thanks to SRAM’s proven Drag Spring clutch

✅ Huge range of compatible components across SX, NX, GX, X0 and XX Eagle families

✅ Genuine SRAM quality trusted by professional riders and weekend trail riders alike

Whether you ride cross-country, trail, enduro or all-mountain, Eagle is designed to keep shifting accurately in demanding conditions.

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⭐ Features

• ✔️ Designed for SRAM Eagle 12-speed mechanical drivetrains
• ✔️ Direct replacement for SRAM SX Eagle and NX Eagle derailleurs
• ✔️ Updated design based on over 10 years of Eagle development
• ✔️ Compatible with SRAM X-Actuation shifters
• ✔️ Long cage design for wide-range gearing
• ✔️ Proven Drag Spring clutch reduces chain slap
• ✔️ Steel cage construction for durability
• ✔️ Compatible with Eagle cassettes up to 50T

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📋 Specifications

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🔧 Compatibility

Compatible with:

• SRAM Eagle 12-speed mechanical shifters
• SRAM SX Eagle
• SRAM NX Eagle
• SRAM GX Eagle
• SRAM Eagle 12-speed chains
• SRAM Eagle 12-speed cassettes up to 50T
• Standard derailleur hangers (Standard Mount)
• Universal Derailleur Hanger (UDH) frames (Half Mount)

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🛒 Why Buy Your SRAM Components from Hopkinson Cycles?

Choosing the right bike parts is important—but choosing the right retailer matters too.

When you order from Hopkinson Cycles, you’re buying from one of the UK’s trusted independent cycling specialists with thousands of happy customers.

Here’s why riders choose us:

🚴 Cycling specialists – We’ve been supplying genuine bike parts and accessories for many years.

📦 Fast UK dispatch – Order before 1pm Monday–Friday and we’ll dispatch your order the very same day.*

🏆 Trusted by thousands of cyclists – We supply everyone from commuters and leisure riders to dedicated mountain bikers.

✅ 100% Genuine Products – Every SRAM component we sell is authentic and sourced through official UK distribution.

💬 Friendly expert support – Need help choosing the correct part? Our experienced team is always happy to help.

💷 Competitive prices – Great value on leading cycling brands without compromising on service.

🔒 Secure online shopping – Shop confidently using our secure checkout.

📍 UK based company – Fast delivery and UK customer support you can rely on.

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📞 Need Help Choosing the Correct Rear Derailleur?

Not sure whether you need the Standard Mount or Half Mount version?

Our team is happy to help before you order.

📧 Email: info@hopkinsoncycles.com,

☎️ Telephone: 01924 274209

💬 We’re always happy to help you choose the correct SRAM component for your bike.