SRAM PG-820 8 Speed Cassette - 11-30T

No, the SRAM PG-820 is specifically designed for 8-speed drivetrains. Using it with a 9-speed system will result in poor shifting performance or complete incompatibility.

You need an 8-speed compatible freehub body, commonly known as an HG (HyperGlide) style freehub body, typically found on 8, 9, and 10-speed compatible wheels.

For optimal performance and longevity, it's recommended to clean your cassette regularly, especially after riding in wet or muddy conditions. A thorough cleaning every few hundred miles or as needed is generally advised.

While a 9-speed chain might function minimally, it is not recommended. Using an 8-speed chain ensures the best compatibility and shifting performance with the PG-820 cassette.

The cassette has a range of 11-30T, meaning the smallest cog has 11 teeth and the largest cog has 30 teeth.

Worn cassette teeth often appear hooked or pointed, rather than their original somewhat rounded shape. If you experience frequent chain skipping, especially under load, it's a strong indicator the cassette needs replacement.

Typically, the cassette is installed using a separate cassette lockring, which is often integrated into the wheel's freehub body or supplied with the wheel. The cassette itself consists of the sprockets.

Check rear derailleur hanger alignment. Adjust derailleur cable tension. Ensure the cassette is correctly installed and lockring is tight. Verify chain and shifter are 8-speed compatible.

Clean the cassette and chain thoroughly and re-lubricate the chain. Ensure the cassette is properly seated on the freehub body and the lockring is secure.

Inspect the teeth of the affected cog for damage or wear. Ensure derailleur limit screws are correctly set for that gear range.

Confirm you have an 8-speed compatible freehub body. This cassette is not compatible with 7-speed Shimano/SRAM freehubs without a spacer or 9/10/11-speed specific freehubs.