Does anyone have/know the rough tyre life %'s for each of the tyres, when compared to one another in GT4? ie. If I can do 10 laps on R3's at track x, that should mean I'll be able to do 15ish? laps on R2's and 22ish? laps on R1's (those numbers are just a guess, I'm hoping someone has slightly more factual actual numbers). Links, rough lap numbers or %'s either would be useful.