I have a small trailer that I use to carry a 14' boat. Nothing fancy, no brakes on the trailer or anything like that. Last year I had a new axle and hubs installed after the old ones burned up. After getting the trailer ready for spring and changing the grease in the bearings I've taken it for a couple of short test drives to make sure all is well, maybe 10 minutes each most of which is at 55 mph. In both cases when I got back one hub was cool to the touch and the other was warm. Definately not hot, not even close to being uncomfortable to touch, but very noticably warm.<br /><br />Is this something to be concerned about, one wheel warming up and the other not? I'd be very grafeful for any tips here as I'd really like to avoid a repeat of last year's trauma.