If you look at the infra red camera feature on TV broadcasts of F1 it illustrates very clearly what happens. Front tyres: The camber is optimised so the tyre load and so heat spread is even across the tyre at the highest cornering loads. That's what camber is for, so when the chassis leans over and centrifugal forces fight the tyre that at the highest cornering loads the greatest possible contact patch is achieved. With camber on a straight the inner edge runs hotter. Rear Tyres: camber is less as the tyre has to perform more in a straight line (power delivery).