BBS02 Tandem Setup – Any Solutions for the Sync Chainline?

Toodn1951

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I’m working on a tandem setup with a BBS02 mounted in the stoker position. The motor has a 165 mm spindle, but unfortunately the sync chainline isn’t quite where I’d like it to be.

I’m wondering if anyone has found a way to use a longer/wider spindle with a 68 mm square-taper bottom bracket. I don’t need a perfectly straight chainline—something around 145 mm might be enough and would only give me about a 10 mm offset.

Has anyone experimented with this kind of setup? I’d appreciate any advice on compatible spindles or bottom brackets that might work.
 
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