why do i have to change tyres in 1 hour race? that is not realism, when i am able to drive 1 hour with 1 set of tyres. 55 till 60 laps are possible with r1. with such "old" tyres are the best times possible. i shorter races is makes sense, cause the tyres will cool down around lap 15, what means u are driving with hot tyres the whole race when u cant change the tyres.