How to Easily Remove the Cassette on a Mountain Bike
To remove the cassette on a mountain bike, first, remove the quick-release skewer or thru-axle from the rear hub. Then, use a cassette lockring tool and a chain whip to unscrew the lockring by turning it counterclockwise. Once the lockring is removed, slide the cassette off the freehub body. For cleaning or replacing the cassette, reverse the process and tighten the lockring with a torque wrench to the manufacturer’s specifications.