Check things out further today and here is what is happening.
The wheels act as a heat sink. So when traveling and short stops the wheels are cool to the touch. But stop for 10 - 15 minutes the heat from the front drum brakes (if alot of braking is done) disipates out onto the hub and wheel.
I guess I just never noticed it.
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2012 Showhauler 28'6" Motorhome on a Columbia w/ 450 Mercedes.
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