1. On the press conference after the Qualy one journalist put the following question:
“It looks pretty strange for us because usually Mercedes has some problems to extract the maximum out of the softest compound tyre, today you were pretty strong on that. Ferrari was quite the opposite. Do you have an explaining for that? Seb mentioned thinner tyres this weekend. Is it related to this or is it special track surface we have here track layout or…?” Lewis didn`t knew/wanna respond, Bottas did something vaguely but Seb answered and told us that:
“The tyres are different. They are different for everyone so everyone needs to cope with that. I think it was exceptional that Mercedes were struggling in the last events as much as they were – but thinner tread, basically the tyre is harder, so, we still have the same tyres, if you look at the colours, but they are harder than they used to be.”
2. Another one put the following question:
“All of you are saying you’re having problems with the tyres. What is it, exactly? Do they not reach the temperature? Go over temperature? Graining? They have blisters? Also, Lewis, you used the supersoft at the end of Q2 after registering your time on soft tyres, and also you got the best time on supersoft in Q3. All weekend until now you didn’t have a so-good lap with supersoft.” And Lewis did the following answer:
“ It’s because it’s a constant learning process – but these tyres, they seem to have the smallest working window. Whether you give us more rubber or less rubber, they appear to be a lot harder than last year. I know they went softer but I think it’s more so because the working range is far narrower than it was last year – and so you give it everything on an out-lap and you still don't have your tyres in the window. And they heat the tyres up in the blanket. This year they’re just too hard. That’s why everyone struggles. I don’t understand why they worked in Australia and haven’t worked ever since and today we have them working. Yeah, let’s hope… I was saying to Valtteri, when we get to Monaco we’re going to just be driving around on cold tyres because it’s not very easy to get your temperatures up there.”
3. Now, first of all, we must look at Pirelli site in order to understand which working window has both S and SS tyres (at least the old ones):
https://www.pirelli.com/tires/en-us/mot ... omepage-f1# In case of the
SS this
tyre “is ideal for slow and twisty circuits,
especially in cold weather, when maximum mechanical grip is needed. The supersoft benefits from an extremely rapid warm-up time, which makes it
ideal in qualifying as well, but the flip side to that important characteristic is, of course, increased degradation. This is a
low working range compound”. ...
In contrast, for
S tyre: “This is one of the most frequently used tires in the range, striking a very good balance between performance and durability, with the accent on performance. It is still
biased towards speed rather than long distances but is nonetheless capable of providing teams with a competitive advantage both at the beginning of the race on full fuel and when used as a ‘sprint’ tire at the end.
This is a high working range compound.”
4. These new tyres have a thinner inner tread by 0.4mm so their operation window shifted up by a few centigrades, as Seb said being harder than the previous ones. This means now a car which has a setup to run them harder now can`t overheat them, so they could reach the optimum operating window and extract the maximum grip out of these tyres. Not to mention a lower rake car philosophy gives you a shorter suspension setup hence car`s operation window is smaller …
5. In order to understand that we should look back at China qualy when Merc went faster on S tyres and Ferrari on US ones. US tyres being
“low working range compound for use on tight and twisty circuits that place an emphasis on mechanical grip” were overheated both in Q1&Q3 by Merc`s car setup and that`s why they went for S tyres ending being fastest in Q2. Another reason why they went to the S tyres is the fact that these soft tyres have the widest operating window from all of 2018 tyres available, so they could reach it even having a small one. Now here at Barca Ferrari having a softer setup than Merc and having a harder tyre than previously known ones they couldn`t put enough energy hence heat into them in order to hit the sweet spot aka optimum temp working range, which went upwards as I said before …