Originally Posted by BennyBagems

I've been running the Extreme stock speedy with a SP 21.5T for some time with good results.
I have now moved up to 13.5t so I decided to try out the HW motor, it ran quick, stayed cool and imploded after 5 1/2 mins.
The magnet disintegrated inside the motor, I hope this was a one off, I have been reading that the new HW motors have good quality control.
I'm currently sorting out a replacement with my vendor (who has been awesome help from the start).
I hope it was only a once off, time will tell I suppose.