The motor simulator shows a Bafang g370 @ 36v/15A managing 15km/h up a 10% hill for 7 minutes with a rider adding 100w and bike + rider = 100kg which is pretty impressive !Small lightweight motors may not be good for the heavier rider on steeper ascents but with the lower rpm winding of sub 201 I can vouch they are very capable for towing heavy loads on even terrain with modest gradients.
The Bafang G370 though a front motor has proven to be a superb runner for me
Motor Simulator - Tools
Our ebike motor simulator allows you to easily simulate the different performance characteristics of different ebike setups - with a wide selection of hub motors modeled, and the ability to add custom batteries and controllers and set a wide variety of vehicle parameters you'll be able to see...
ebikes.ca