[simplechamp]

The way I see it the higher kv setup would have the smaller load (lower gearing) and the lower kv setup would have the larger load (higher gearing). So I understand the lower kv motor might have more torque, but it also has a bigger load applied. The higher kv motor has less torque, but it has less load too. If you look at the rollout numbers the lower kv motor would be doing an extra 36% more "work" per revolution than the higher kv motor. For each revolution it's turning the tires further by 36% so I'm not sure if the extra torque will really do much besides cancel this out, if it will even do that.

It will take a given amount of power to make the vehicle go a certain speed (for example 1000W to go 40mph) and the battery voltage is staying at 14.8V for both motors, then each motor should draw 68A to run the vehicle at 40mph. That logic seems to say that it shouldn't make much difference which motor is used.