maxwell11 wrote:
I have found that on a really hot day, as stated above, the temp. will get to 135 deg. (The highest I have recorded.) Normal around 90/95. You want both sides to be close in temp. and there will be some variation between front and back hubs. but not more than say, 5-10 deg.
I wouldn't use that as a guide. Ambient temp here in FL in the middle of the summer will be 95. I know it sounds simple, but I've always used the "touch" test like people have done since the beginning of trailering. Maybe its just me, but I think there's an inner sense within you that let's you know when something is too hot to the touch.