Re: Rear tires problem

More brake bias to the rear does usually not help with tire wear on the rear, quite the opposite is the case. 

However, you can try more downforce on the rear, softening rear suspension, roll bars or lowering rear ride height. You can also increase tire pressures on the rear as long as they don't start to overheat then.

But in the end it seems to be a common theme in this game, even tho it's not on every track. Sometimes (e.g baku) trying to fix this would result in a way to understeery setup.