[Willym]

It's very unlikely that you have 4 bearing problem - unless a recent bearing job was done incorrectly - bearings too tight or not enough oil. A greater concern would be very uneven hub temps, and that's where an IR gun will come in handy. An air temperature of 95 will result in the bearings and the brakes running at a higher temperature. 50 or 60 F above air temperature will make your hubs a little hard to hold on to. I presume that you have oil bath bearings and if so, c\you should make sure that the oil level is OK.