How to rework cassette for improving chainline on mid drive ebikes

This video is applicable for basically all DIY mid drive electric bike conversions, but is particularly useful for BBSHD and BBS02. It allows you to keep the full range that your cassette provides while significantly improving the chainline. It also saves wear and tear on the chain because anyone doing this modification does not have to shift through as many gears.


NOTE: Please take care to adjust your low limit derailer screw after you make this modification, so it does not shift into where it would be expecting those extra sprockets to be!

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This is where to buy the Gearclamp used in this video


The cassette was a SunRace CSM98 bought on ebay


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This video courtesy of Lunacycle and the Electric Bike Forum


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* For the full guide on rearranging a cassette see the knowledge base article which explores how to do this without a gearclamp

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