@ Ken
Thanks a lot for the new input!
This sounds really logical to me, and would explain, why it gets worse in the middle of tin the race, as the tires get more grip!
My first thought was a too stiff gear diff, but wasnīt really logic, as the gear diff will probably get weaker with warmer oil. Didnīt explain the rather good grip at beginning of the run.
I will check the dual rate and reduce it next race.
In principle I run also spec tires, but went to S-Grips front and rear to get more front grip, but for sure car is more settled with different tires f/r as kit.
Also tried double stuffing te rear wit an additional insert in the rear. (tipp here in the forum), and it reduced wear in the rear. But maybe it wasa bit too much.
Anyway, switching tires front too rear didnīt solve my problem, so I excluded this for the moment.
Camber is another thing. Maybe I got too much understeer by too much rear camber, and compensated with too much dual rate.
A lot of new things to tryout now.
Will also try your spring combo next time.
BR,
Matthias