How to Change the Cassette Cogs on Your QuietKat

Tools Needed:

• 15mm open-ended wrench or socket
• Large spanner
• Chain whip
• Cassette locking tool
• Replacement cogs

Procedure:

1. Remove Rear Wheel:

   • Shift down to the smallest cog (highest gear).
   • Loosen the 15mm nuts on both sides of the axle to remove the rear wheel.
   • Pull the derailleur back to drop the wheel out of the frame easily without interfering with the chain.

2. Remove Cassette:

   • Remove the 15mm axle nut on the cassette side and the accompanying washer.
   • Use the chain whip to secure the cassette by wrapping it around gear number three.
   • Use the cassette locking tool and a large spanner to loosen the cassette lock ring.
   • Remove the lock ring and bottom two cogs.
   • Align and install the new bottom two cogs by matching the splines on the hub and new cogs.

3. Reinstall Cassette:

   • Thread the lock ring by hand and use the lock ring tool to tighten (40 Newton meters).
   • Reinstall the washer and axle nut, tightening them halfway.

4. Reinstall Rear Wheel:

   • Lift the rear wheel into the dropout, looping the chain under the cassette.
   • Align the chain with the smallest cog and roll the wheel into place.
   • Ensure the brake rotor is aligned with the caliper.
   • Hand-tighten the bolts to secure the wheel temporarily.

5. Final Wheel Alignment:

   • Drop the bike onto the ground to use its weight for wheel alignment.
   • Loosen both bolts slightly, wiggle the bike to ensure straightness, and then tighten the bolts securely.

6. Verify Tightness:

   • Check and ensure that all bolts and nuts are tight before each ride.

Now, you're ready to enjoy your ride with the newly replaced cassette cogs.