ferkan wrote: ↑15 May 2018, 09:17
So 0.4mm can't change car performance, but according to Isola, that thread shaving off resulted in us going from "tire lottery" and probably few pitstops, to safe 1 stop with 0 graining?
Starting from cold with the extra 0.4mm of rubber was a safety issue, because there was excess rubber that could move around much more during the heating phases (e.g. race start and qualifying), therefore heating the surface too quickly with the result of dangerous levels of blistering.
Using the new tyre would have been the rough equivalent of mounting a used tyre - same for everyone and of no general consequence (less the blistering). As Pirelli has argued and as evidenced by no one else, but Ferrari having problems, the 0.4 mm removed did not change the fundamental characteristics of the tyre.
The link from Catalunya below clearly shows a tyre that, in the worst scenario, had potential to maim or kill. Do you really believe that such a tyre could have been presented for a race?
In truth, this tyre argument is little more than bad politics and should be laid to rest.
https://www.racefans.net/2018/03/13/tyr ... spain-283/