Compared to your temps mine do look high. The only thing perhaps is the accuracy of your heat tracer or pyrometer, it could be reading low maybe or not. How do you know its accuracy? Ours is checked anually against a blackbody which is calibrated anually to the National Bureau of Standards for accuracy and certified for accuracy. Our thermal imager is accurate to within 2 degrees on either side of what the Blackbody reads.
Yup, you are correct. There is a lot of chance for variations in temps even where the temps are taken on the hub or brake assembly. I try to take the temps on each wheel at the same place as I am far more concerned with hub and brake temp variations than overall values. I don't pretend to think that the $39 Harbor Frieght probe is as accurate as what you use but I also can't think it is 40 or 50 degrees inaccurate either. Coming down Pikes Peak temps are checked by staff and at 300 degrees you are pulled off the road for brakes to cool. So, even at 160 you are still way under what would be considered getting hot. Kind of makes the diesel guys with exhaust brakes smile as they rarely (if ever) need the service brakes going down.
