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BBS02 dual chainring howto

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  • djp1987
    i am definitely going to try this when i get my bbs02. if my math is right the motor should have the chainrings placed at a distance from the BB that my 3x derailleur should have enough reach when i use a 2x shifter, at least on my particular frame.

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  • paxtana
    started a topic BBS02 dual chainring howto

    BBS02 dual chainring howto

    Disclaimer: While this is technically possible it will be up to you to determine if the chainline on your frame can accept this modification.

    Parts needed, listed in order of what will be bolted onto the motor first:
    1. BBS02 mighty mini 30t chainring
    2. BBS02 chainring spacer
    3. BBS02 chainring adapter for BBS02
    4. 5mmx16mm bolts (this goes through the adapter, spacer and chainring)
    5. Race Face chainring
    6. Chainring bolts (for bolting Race Face to the adapter

    Click image for larger version  Name:	image.png Views:	1 Size:	1.02 MB ID:	77538

    Can this be used with a derailer to change between the front chainrings?

    A derailer might be a good idea even if only using it as a chain guide, but probably best to move it by hand. If shifting with a derailer do so carefully.
    Here is a video showing a similar modification while using a derailer. Shifting is okay for the most part but you can see it has some issue shifting at the 22 second mark.