How to Install, Adjust, and Maintain the XG-1275 T-Type Cassette

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in Cassette, Eagle, SRAM

The XG-1275 T-Type [paid link] cassette is a high-performance, wide-range cassette designed for SRAM’s Eagle Transmission system. It features a robust one-piece design with full X-SYNC™ technology for superior chain retention and smooth shifting. If you’ve recently purchased an XG-1275 T-Type [paid link] cassette or want to maintain it for peak performance, this guide will walk you through the installation, adjustment, and maintenance process.

With precise setup and routine care, this cassette can provide years of flawless shifting and durability. Let’s dive into the technical details to ensure your drivetrain operates at its best.

Tools Required

Before starting, gather these tools:

  • Cassette lockring tool [paid link] (SRAM XD [paid link]/XDR [paid link] compatible)
  • Torque wrench [paid link]
  • Chain whip
  • Clean rag or shop towels
  • Degreaser (such as Muc-Off or Simple Green)
  • Lubricant (dry or wet lube [paid link], depending on riding conditions)

Understanding the XG-1275 T-Type Cassette

The XG-1275 T-Type [paid link] cassette is part of SRAM’s Eagle Transmission lineup, engineered for direct mount on SRAM T-Type rear hubs. This model features a 10-52T gear range, providing a 520% range for steep climbs and high-speed descents.

Key Features of the XG-1275 T-Type Cassette

  • Full X-SYNC™ tooth technology: Improves chain engagement and minimizes chain drops.
  • One-piece steel construction: Enhances durability while keeping weight low.
  • 10-52T range: Provides a wide range for both technical climbs and fast descents.
  • Direct mount (no cassette lockring required): Works exclusively with SRAM T-Type derailleur systems.

Compatibility Notes

  • The XG-1275 [paid link] T-Type cassette is not backward compatible with traditional Eagle drivetrains.
  • It requires a SRAM Transmission (T-Type) derailleur and a matching XD [paid link] freehub body.
  • Works exclusively with flat-top Transmission chains, ensuring smooth shifting and durability.

How to Install the XG-1275 T-Type Cassette

Installing the XG-1275 [paid link] T-Type cassette is straightforward but requires precision. Follow these steps to ensure correct installation:

Step 1: Remove the Old Cassette

  1. Place the bike in a work stand to keep it stable.
  2. Use a chain whip to hold the old cassette in place.
  3. Insert the cassette lockring tool [paid link] into the lockring and turn counterclockwise to loosen and remove the cassette.

Step 2: Clean the Freehub Body

  • Wipe down the XD [paid link] driver body with a degreaser-soaked rag.
  • Check for wear or damage on the freehub splines before installing the new cassette.

Step 3: Install the XG-1275 T-Type Cassette

  1. Align the cassette with the XD driver body splines.
  2. Slide the cassette onto the freehub, ensuring it seats flush.
  3. Apply the recommended torque (40Nm) to secure the cassette.

Important: This cassette does not use a traditional lockring; it self-tightens as part of the SRAM Transmission system.

Adjusting the XG-1275 T-Type Cassette for Optimal Shifting

Step 1: Set Up the Derailleur

The SRAM Eagle Transmission derailleur auto-aligns with the cassette’s smallest cog, but fine-tuning is essential:

  • Check chain wrap: Ensure the chain wraps around the largest cog correctly.
  • Align the derailleur hanger: Use a derailleur hanger alignment tool if shifting feels imprecise.

Step 2: Fine-Tuning Indexing

  • Shift through all gears and listen for chain noise.
  • If shifts feel sluggish, adjust the micro-adjustment feature on the AXS controller (if applicable).
  • Ensure the flat-top chain is correctly tensioned, as improper tension can cause skipping.

Maintaining the XG-1275 T-Type Cassette for Longevity

1. Regular Cleaning

To prevent premature wear, clean the cassette every 200-300 miles, or after riding in muddy/wet conditions:

  1. Remove the rear wheel.
  2. Spray the cassette with degreaser and let it sit for a few minutes.
  3. Use a cassette brush to remove built-up grime.
  4. Rinse with water and dry thoroughly before reinstalling the wheel.

2. Lubrication Best Practices

  • Apply dry lube [paid link] for dusty or dry conditions.
  • Use wet lube [paid link] for rainy or muddy rides.
  • Avoid excess lube buildup—wipe off any extra to prevent dirt accumulation.

3. Checking for Wear and Replacement

  • Inspect the cassette every 1,500-2,000 miles for worn teeth.
  • If shifting becomes inconsistent despite adjustments, the cassette may need replacing.
  • Use a cassette wear checker tool to measure wear on the cogs.

Troubleshooting Common XG-1275 T-Type Cassette Issues

1. Chain Skipping Under Load

  • Check if the cassette teeth are worn.
  • Ensure the chain is not stretched beyond 0.5% using a chain checker tool.
  • Verify the derailleur’s AXS firmware is up to date for precise shifting.

2. Noisy Shifting

  • Clean the cassette and chain thoroughly.
  • Fine-tune the micro-adjust settings on the AXS derailleur.

3. Difficult Shifting in the Largest Cog

  • Ensure the B-gap adjustment is set correctly.
  • Verify proper flat-top chain installation.