I'm looking to order the tool to remove the cassette lockring on my bike, but I'm not sure which tool to get. Is there a way to tell just by looking at it, or do I have to look it up using the make and model of the cassette?


While I was looking for a more generic answer, specifically I have a Shimano CS-HG20-9 Cassette. Seems to be a freehub style, and probably takes FR-5 tool. However, I wanted to know if there was a way to know for sure that the tool will fit, so I don't waste time ordering the wrong tool.

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    Another approach, take a pic of the lockring, add it to your question, someone here will tell you what the style is. Commented Aug 9, 2017 at 20:40

1 Answer 1


In general you will need to know the brand of the hub and whether it's a freewheel of free hub

This page may help as a start: http://www.parktool.com/blog/repair-help/cassette-and-freewheel-removal-and-installation

Don't forget if it's a free hub you will need a chain whip tool as well as the correct cassette lock ring tool

Might be worth removing the rear wheel and taking it to your local bike shop if you're really not sure

  • As that article shows, the two variants for cassettes are Shimano and Campagnolo compatible. The Shimano-compatible cassettes use the FR-5 Park tool and the Campag-compatible cassettes use the FR-11. Other tool brands of course make compatible models for each. Some parts brands make cassettes for both compatibilities so just knowing the brand of cassette doesn't tell you for sure which tool is needed. If your cassette is an off brand you may just have to try a tool and see if it fits. Commented Aug 9, 2017 at 20:13

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