How to Install, Adjust, and Maintain the XG-1299 T-Type Cassette

Posted on
in Cassette, Eagle, SRAM

The SRAM XG-1299 T-Type [paid link] cassette is the pinnacle of performance for SRAM’s Eagle Transmission system, designed for seamless, precise shifting even under load. With its one-piece, machined-steel construction and a wide 10-52T gear range, this cassette is engineered for durability and efficiency.

In this guide, you’ll learn how to correctly install, adjust, and maintain your SRAM XG-1299 T-Type [paid link] cassette, ensuring optimal performance and longevity.

Tools Required [paid links]

Before you begin, gather the necessary tools:

Step-by-Step Installation of the XG-1299 T-Type Cassette

1. Preparing the Freehub Body

The XG-1299 T-Type [paid link] cassette is designed exclusively for SRAM’s XD [paid link] freehub body. Ensure that:

  • The freehub is clean and free of debris.
  • Light grease is applied to the freehub splines if recommended by the hub manufacturer.

2. Mounting the Cassette

  • Align the smallest cog (10T) with the corresponding spline on the XD [paid link] freehub.
  • Slide the cassette onto the freehub until it sits flush.
  • Thread the lockring or secure the cassette by rotating it clockwise until finger-tight.

3. Torque Specification

  • Use a torque wrench [paid link] to tighten the cassette lockring to 40Nm as specified by SRAM.
  • Ensure the cassette is firmly seated with no play or wobble.

4. Checking Alignment

  • Rotate the cranks and inspect the cassette to ensure even spacing between cogs.
  • If misalignment is detected, re-seat the cassette and retighten the lockring.

Adjusting the XG-1299 T-Type Cassette for Optimal Performance

1. Rear Derailleur Setup with T-Type Transmission

  • The SRAM Eagle Transmission system uses a direct-mount derailleur, which automatically aligns with the cassette.
  • Use the Setup Key method to correctly position the derailleur with the largest cog.
  • Ensure the chain is properly tensioned and wraps smoothly around the cassette.

2. Fine-Tuning the Shifting

  • Shift through all gears, ensuring smooth engagement.
  • If shifting hesitates, use the Micro Adjust feature on SRAM’s AXS system to fine-tune indexing.

3. Ensuring Proper Chain Wrap

  • The flat-top design of the T-Type chain must align perfectly with the cassette teeth.
  • If skipping occurs, inspect for dirt buildup or improper derailleur positioning.

Routine Maintenance of the XG-1299 T-Type Cassette

1. Cleaning and Lubrication

  • Use a mild degreaser and a stiff brush to clean between cassette cogs.
  • Dry thoroughly and apply minimal lubrication to the chain—excess lube can attract dirt.

2. Inspecting for Wear

  • Check for signs of hooked teeth or uneven wear.
  • Use a chain wear gauge—replacing a worn chain early prevents premature cassette wear.

3. When to Replace the Cassette

  • If shifting performance degrades despite tuning, or the cassette teeth appear shark-toothed, replacement is necessary.
  • Always pair a new cassette with a fresh chain for the best performance.

Troubleshooting Common Issues with the XG-1299 T-Type Cassette

1. Noisy Shifting or Skipping Gears

  • Ensure the chain and cassette are clean and lubricated.
  • Check for proper Micro Adjust tuning via AXS if using an electronic drivetrain.

2. Cassette Play or Wobble

  • Inspect the lockring—retighten to 40Nm if necessary.
  • If wobble persists, check the freehub body for wear.

3. Sudden Shifting Performance Drop

  • Ensure the derailleur hanger is not bent and that AXS firmware is up-to-date.
  • Inspect chain for stiff links or excessive wear.

Final Thoughts

The SRAM XG-1299 [paid link] T-Type cassette is built for high performance, but correct installation and regular maintenance are key to maximizing its lifespan. By following this guide, you’ll keep your drivetrain running smoothly for miles to come.