Sensor Based 4 Pole Motors?

[lutach]

This is the info I found and the attached picture along side of it:

"Motor ACs Car 10, Motor ACs CAR 10 PRO - Built in sensor

Brushless motors designed as replacement of stadard size 500 motors for RC car models 1:10. Neodym magnets with high temperature endurance. Balanced rotor. High efficiency (up to 86%). Lower weight (106g) and more power compared to brushed motors. Efficent internal cooling. Standard shaft 3,175mm. Product line ACs is built in compact shell and contains optical sensor.

Motor ACs Car 10 (33 000ot/min at 7,2V, similar to motor with 11 zwinds)
Motor ACs Car 10 PRO (42 000ot/min at 7,2V, smilar to motor with 9 winds)"