Believe it or not. The stator diameter, air gap, magnet thickness and rotor thickness are all related… It’s like a magic ratio for torque output.
Assuming you simply go with the standards set by most china factories (all of the existing outrunner motors on the market) then you are better off measuring stator diameter as a Benchmark.
Just remember, these common motors are not designed for maximum torque outout, they are designed for maximum Power to (motor/vehicle) weight ratio. This is great for airbourne vehicles. However completely wrong use case for esk8.
If you ain’t designing your own esk8 motor you are already 2yrs behind…
110% refund if unsatisfied with Raptor 2 performance is not a marketing strategy, it’s a performance promise.