[FTS]

I think that if a manufacturer provided more technical information that really helps me with my car setup and driving, I'd be inclined to use their tires even for DEs. For example, if I knew how much lateral force a particular set of tires would generate in a GT3, its spring rate effect, force distribution across the slip angles, I believe that would give me significant advantage.

Would you change tires if such information was available to you, of course provided that tires are free and contingencies don't matter?

I am assuming that in series in which spec tires are used, manufacturers are providing such information, but I may be wrong.