RE: ezrun question...
I realize this is all confusing. Just remember that the load on the motor is the biggest factor in how much amperage it will pull. This is why using the right motor for the application and gearing it properly is so important.
There is no way to list a certain motor and say how much amperage it will draw at a specific voltage. To know this you would have to know the exact load on the motor (as well as motor specs that aren't always available). Since many factors can affect this (vehicle weight, tire size, tire compound, surface traction, drivetrain friction, etc., etc.) you can't simply say "it will draw this much".