Need select motor.

PimpMan

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Joined
Feb 8, 2018
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I weight 200 lb, need top speed no more than 20mph, cursing speed ~15 mph, i live in mostly flat area no major hills.

Need light weight small geared hub motor is 250w enough or i should look towards 350w?
 
250 will work till the wind blows. When it blows hard, even 350 will slow down, so in general, go with the highest wattage you can afford, and or be legal.

Your weight will not be a problem till you have a steep hill, into that 30 mph wind. In the conditions you describe, 250w will easily get you a 15 mph cruise, with pedaling, but not hard pedaling.

Your best bet, if legal where you live, would be a motor rated at 500w, with 36v 20 amps rated controller, 750w. Then you will have your target speed up the hill, and even up hills into wind. But again, even with the bigger motor your wattage while cruising 15 mph and pedaling won't be more than with the smaller motor. The smaller motor will be lighter, but not really all that much lighter than a 500w rated geared motor.
 
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