The BionX cassette tool allows you to easily install and remove Shimano HD cassette lock ring's on all BionX motors that use a cassette. The BionX cassette tool is a must have for anyone installing or servicing their own kits.
The BionX Cassette tool simply slides over motor shaft and inserts into the cassette. Using a wrench simply tighten to the correct torque indicated on the cassette lock ring and you're done.
Removing the cassette is just as easy. Simply insert the tool and rotate counter clockwise. Note that the use of a chain whip is required to remove the cassette from the freehub. Click the link to see our chain whips.