Originally Posted by DanielB
1) Warm tires on the trailer. Stopped a few times and checked how warm the tires were on the trailer. Not all are the same temp. One in particular is warmer than the others.
Ideally, the tires shouldn't feel much warmer to the touch than the pavement they're sitting on, this time of year.
I can think of three reasons why one tire might be hotter than the others:
1 - Low on air (measured when tire is cold) causes increased flexing of the sidewalls, which leads to heat. A tire pressure gauge should tell the tale here. Tire will also be hotter than the wheel.
2 - Bearing in hub is worn or low on grease, which leads to friction as the tire rolls. An IR meter will help diagnose this; if it's the bearing the axle hub will be the hottest part of the wheel.
3 - Improperly adjusted brake is dragging, which again leads to friction as the tire rolls. As above, but the brake drum will be hotter than the hub.