I add info for others to read along with yourself.
You can see an extensive review of motors from the 35H Leaf which is commonly referred to as "1500w" or the 45h mxus "3kw" to the mxus 5kw (55h???), meaning 35mm stator, 45mm stator, 55mm stator.
Different versions of a motor could mean steel stator or aluminum stator (cooling aspect), curved magnets (no clue, I never found out the benefits if any to curved magnets), two phase sets 3 wires x 2 = 6 sense wires which means your phase wires might not be maximized to their fullest potential (more amps through wire = more power) , but its not really a thing, unless your stuck up on it, like the "Efficiency" people are, hyper-miling it, get every mile out of every watt-hour, like the saving grams on components for the roadies. Some people use stock 12g wire then bump it up to 10awg at axle exit, some stuff bigger wires in or grinding the sharp edge on the axle exit or porting the axle path with a rotary tool. I find its all in the wire you choose, the Teflon PTFE is real stiff plus it has less strands and stiffer strands so its harder to stuff in and around the 90* bend. It was always tuff to stuff in the 3rd 10g ptfe teflon, while the 2nd wire was doable.
Mxus and QS have various versions of the same motor, I am not familiar with QS on each versions, but I know mxus, and the origins of the Edge/Leaf from steel to alum stators.
You see users on the forum take a digital measurement caliper (digital ruler) and measure the stator width, lamination thickness, phase wire diameter. A more advanced user might measure the phase resistance with a MegaOhm meter, or do calculations for various Kv's or Turn Count (3T, 5T, 8T) to optimize their components for their needs.
These are the motors you want to buy, well researched and well studied by independent individuals.
Dont buy just any motor from a random unknown seller because the price is right, unless you want to fiddle around and prepared to be dissappointed, as you were by the sellers lies. Then you might have wait for it to ship to your door if it comes at all, then what about customer service, returns?
Small scooter hubs the tire mounts to the motor, motorbike/bike hubs are laced with spokes.
Power to size would be a concern?
Go wider!
Double stator hubs are out there. You should good to find a 3-4kw scooter hub for your robot project on the QS website.
