Just like brake calipers can apply certain but small pressure to brakes and cause weird smell this is connected to tire temperature.
Source: www.carcare.org
If brake calipers apply pressure to brakes during driving this will automatically lead to slower and harder wheel spinning which ultimately leads to over heating of truck tires. Pay attention to that details and if you notice both signals than you have more than obvious reason to suspect that something is wrong with brake calipers.
7. Harder/Slower Vehicle Acceleration
Only the top professional drivers can notice this and even they after noticing that something is wrong will take a look on this after checking 5 potentially wrong things.
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Hey but this is OK I understand that you go one by one thing and eliminate one by one cause and finally you determine what is it about. This signal is also directly linked to the previous two and it is a side effect number 3 that will show you something is not right.
Conclsuion
As you were able to read there is a lot of things to have in mind how to make brake calipers working in the way that they are supposed to. But implement the procedures that will make truck drivers take a few minutes inspection ever two weeks and you will be able to eliminate the possibility of brake calipers mail functioning.