Adding a second front chainring?

red

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New to ebikes. Been looking for a mid-drive kit. Recommendations are welcome, for conversion kits. I plan to convert a 26" trail bike, for the nice suspension, but I do not plan to go off-roading. So far, the Bafang BBSHD Mid Drive Ebike Kit looks okay, but all mid-drives that I see have only one front chainring. I live in mountain country, and even the somewhat flat roads in town are not really flat. Various sizes of Bafang chainrings are available, so it seems possible that a second chainring could be added with a front derailleur, but I may be missing something. The reviews on the LunaCycle parts pages mention this possibility, but not much is there about the results. I expect to be careful when shifting, with little or no motor power applied for that instant, just normal pedaling. I expect to tinker with the path of the chain, to align the gears and chain properly. Those considerations aside, is there more I should know? Does anybody have experience with this concept and execution? Any pitfalls to avoid? TIA.

 

Anton

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You can do this with the Bafang BBS kits. You will need a chain ring adapter.

(Turn on the subtitles for English)


Chainring Adapters:

Bafang BBS01/02:

Bafang BBSHD:
 

red

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Anton,

Thanks, I did believe there was a good answer available, and it looks like you have it.
Is anybody here doing this two-chainring mod for the Bafang? Any tips?
I would hope to add two "chainguard" plates to this rig, to prevent dropping the chain to the inside or outside of the chainrings.
This "extra" mod may need longer bolts for the chainrings, but that is not a problem.
Thanks again.
 
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