Two Chainrings – Better than One?

Why two chainrings?? Well, a couple of reasons.

I have played around with 3 different sized chainrings so far but only one at a time can be fitted onto the drive from the Bafang motor. I am seeking the ideal size giving an high enough top gear so 30kph can be pedalled easily but also with a low enough bottom gear to allow hill climbing with spin to stop the Bafang lugging and getting hot. Probably not a concern in winter in Tasmania but necessary in the summer when hill climbing in 30°C plus temps.

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