[Richard]

There are pros and cons to tying the duals together. Most run them independently. I have never had a problem having them get very far away from the same pressure. And if you lose one, like I have, the other one stays up and gets you off the road.

As far as temp goes, keep in mind the TPMS sensors that screw onto the valve stem are only INDICATORS of temperature. There is no way they can actually measure the temp of the air inside the tire. They are effective at detecting dragging brakes or other conditions that heat up the tire. Only TPMS systems that have a sensor inside the tire can measure the actual air temp in the tire.