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[shawnm]

Hi:
I'm trying to determine the correct kw motor for a vintage scooter I'm considering as an EV conversion project. It weighs 340 lbs and originally had a 175 cc motor. A 12 inch QS-motor wheel would give me approximately the same diameter rear wheel, but they come in sizes from 3-12kw. I'm looking for consistent 40mph with occasional 50-55mph performance. I've seen various formulas to calculate speed (for example, https://endless-sphere.com/forums/viewtopic.php?t=79178) but they don't factor in real world weight and performance requirements enough to make me feel comfortable.

I'm using an 8kw hub motor on a microcar  that I converted and I'm happy with the performance. That weighs in around 600lb. I don't want to "leave wattage on the table" if you know what I mean. I've attached pictures of similar scooters and car for a frame of reference. thanks Shawn