Just thought I'd add a little note to anyone whose struggling with getting their heads around tyres. This is purely from my experience and I'm sure it'll differ for others but...
SS: Under 8 degrees and only for 8-12 laps
S: 9 - 22 degrees for 16-22 laps
M: 14+ degrees for 24+ laps
H: unused as barely competive
Wet & Inters vary from player to player depending on drivers at the time so can't really range it but
Inters up to 3mm rain and wets 3mm+.
For those fresh to the game I hope these tips help, for those experienced enough to have figured it out for yourself, don't hate because you're too selfish to help out others.