Cassette Wear Indicator use for a trail, mountain or road bike using a Rohloff 9 speed cassette checker. Check when doing maintenance or repair will give you an idea of the need to replace the cassette. In another video we show you how to build a 10 speed cassette wear indicator.

Although results do vary due to varying tooth profiles among cassettes, I find it a useful tool for the early detection of wear for my Shimano and SRAM cassettes before you see visual changes to the cassette teeth - as long as the chain on the wear indicator is the same (9 or 10 speed) as that of the cassette.

With time and experience, you can just look at the cassette cogs, looking for visible wear and comparing teeth from one cog to another.

One can also pull the rear brake and then push down on the pedals and watch if a new chain wants to climb up the teeth as if it wants to skip over top of them. This is also a good indication of a worn cog. However, by this time, you'll probably need to replace your chain and possibly your chain rings.

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