SRAM GX Eagle Transmission XS-1275 T-Type 12-Speed Cassette 10-52T – Black

The SRAM GX Eagle Transmission XS-1275 T-Type Cassette is at the heart of SRAM’s revolutionary Eagle Transmission drivetrain system, delivering outstanding shifting performance even under maximum power. Designed specifically for the demands of modern mountain biking, this cassette provides incredibly smooth and precise gear changes whether you’re sprinting, climbing, or putting down full power through technical terrain.

Featuring SRAM’s advanced Full X-SYNC tooth profile technology, shifting performance actually improves under load, allowing riders to shift confidently while pedalling hard without hesitation or compromise.

With an enormous 520% gear range, the XS-1275 cassette offers climbing gears for the steepest ascents alongside high-speed gears for fast descents and flat-out efforts. SRAM has refined the lower gear progression by introducing larger 38T and 44T cogs before the 52T sprocket, resulting in smoother and more usable gear transitions where riders need them most.

Constructed using a combination of Pindome technology for cogs 1-8 and a lightweight MINI-CLUSTER design for cogs 9-12, the cassette delivers an excellent balance of durability, stiffness and weight.

The integrated Setup Cog makes installation straightforward and helps ensure perfect setup every time – fits on XD freehub bodys

---

⚠️ IMPORTANT COMPATIBILITY INFORMATION ⚠️

This cassette is ONLY compatible with SRAM Eagle Transmission (T-Type) drivetrains and SRAM T-Type Flattop chains.

It is NOT compatible with:

❌ Standard Eagle 12-speed chains
❌ SRAM XX1 Eagle chains
❌ SRAM X01 Eagle chains
❌ SRAM GX Eagle chains (non-T-Type)
❌ SRAM NX Eagle chains
❌ Shimano 12-speed chains
❌ KMC 12-speed chains
❌ Any non-Transmission drivetrain components

This cassette has been specifically engineered around SRAM’s new T-Type Transmission architecture and MUST be used with a SRAM T-Type Flattop chain to function correctly.

Using a conventional Eagle chain or any non-T-Type chain will result in poor shifting performance, accelerated wear and potential drivetrain damage.

For correct operation, this cassette should be paired with:

• SRAM XX SL Eagle Transmission Flattop Chain
• SRAM XX Eagle Transmission Flattop Chain
• SRAM X0 Eagle Transmission Flattop Chain
• SRAM GX Eagle Transmission Flattop Chain

It is also designed exclusively for use with SRAM Eagle Transmission rear derailleurs and cranksets.

If you’re unsure about compatibility with your bike or current drivetrain, please contact us before ordering and we’ll be happy to help.

---

Features

• Massive 520% gear range
• Full X-SYNC technology for exceptional shifting under load
• Optimised low-end gearing with improved progression to the 52T cog
• Specifically designed around a 55mm chainline
• More moderate chain angles for increased drivetrain longevity
• Greater shifting precision across the full cassette range
• Integrated Setup Cog for quick and accurate installation
• Combination Pindome and MINI-CLUSTER construction
• Black finish

---

Specifications

---

Why Choose SRAM Eagle Transmission?

SRAM’s Transmission platform represents one of the biggest advances in mountain bike drivetrains in years. By designing every component to work as a complete system — cassette, derailleur, chain and crankset — SRAM has created a drivetrain capable of delivering remarkably smooth and reliable shifting performance under conditions that would overwhelm traditional systems.

---

Why Choose Hopkinson Cycles?

✅ Free UK postage available on selected items
✅ Family-run cycling specialists with decades of experience
✅ Expert technical advice from real cyclists
✅ Friendly customer service from real people, not a call centre
✅ Fast dispatch directly from our Yorkshire warehouse

📞 01924 274209
📧 info@hopkinsoncycles.com
🌐 www.hopkinsoncycles.com

If you’re unsure whether this cassette is compatible with your setup, get in touch before ordering and we’ll make sure you get the correct components first time.