Note: Image above is for illustration purposes only - aspects of item may vary slightly.

Genuine Shimano HG51-8 cassette suits all Shimano 8-speed drivetrains. The 12-21 gives the closest ratios available on an 8-speed Shimano cassette.

The Bicycle Depot Technical Top Tip: Don't forget a new cassette may not run smoothly with a worn chain. Usually the chain and cassette should be replaced at the same time. It's also a good time to check the chainrings, likewise replace if badly worn. If unsure, seek assistance from a professonal bicycle mechanic.