I ran the older rs pros for a good while and never had any issues. Actually ran them since around 09/10 somewhere around there. I replaced them with the rs pro black editions about a year ago, but the one esc wanted to go into the thermal shutdown in my 4wd with a 5.5. It was okay for a 5 minute heat and the motor was not bad at 144, but around the 6 minute mark in the main it started to cut out and go into the thermal shut down. I had to slow down to keep it running and finish the 8 minute main. At the end of the main the motor was 146. Not sure how warm it would have been if I ran it all out the whole main, but that’s what it was when I checked it. I don’t typically run a 5.5, but I never had any issues when I did with those old rs pros.

Anyways I went back to a 7.5 for club racing and no heat issues in a ten minute main.

I chose the rs pro black over the rsx because I never had any issues in the past, the motor limit says 2.5 brushless and due to the ability to have really clean wiring. I like the way the battery posts are on one side instead of being in between the a, b and c.

I’ll get the rsx pro for mod/outdoors and seal with the clumsy wiring so I don’t have to worry about that issue again.