I have been meaning to get back to this. I got an IR thermometer and have tested it under different conditions. Pretty consistently, the right wheel hub (the one that has more drag) runs about +20F hotter than the left.

Under normal driving, if I check right when I park, the left will measure around 80F and the right will measure around 100F.

The worst I have observed was on a hot day after a lot of sustained high speed driving, it was about 100F at left, 120F at right.

Is this a concern?

Thanks.