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Tyre degradation

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medal 5000
6 years 253 days ago
When I create my strategy for a race, I obviously keep in mind the tyre degradation over a lap. But it seems off a bit, as I can see tyre degradation of Softs is 8% for instance, meaning 10 laps on them would get them down to 20%, but during the race, the tyres usually degrade a lot less, when my drivers go in, they are at roughly 40%.
How does this work? And what would happen if I would tell them to do 14 laps on the Softs and then end up with them going down to 0%? Would the car break down, or would they pit automatically?

Also, it is not really clear to me what percentage of degradation is best to change tyres, all I know now is that the percentage goes red when they drop below 50%, but other drivers seem to continue a lot longer on the same tyres.
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medal 5000
6 years 252 days ago
You have the right idea for figuring the number of laps a set of tires can go. But you should know by now from looking at you past race data that tire wear is not linear. So while the wear starts at 8% for first lap it 2, it decreases making it possible to get closer to 14 laps.

As for what happens when tires get to 0%, they blow out. Your car rides around very slowly and pits for new tires. Hopefully you have enough fuel because I assume fuel consumption would go way up on that lap. Running out of fuel is race over.

Lastly, there is a slight performance drop-off at 50%, and a huge drop off (cliff) around 20%. You have to experiment with the different compound to see where it truly is at.

You have to weigh the slower lap times against the time lost for a pit stop to decide when it makes sense to pit
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medal 5000
6 years 252 days ago
Thanks, that explains a lot. So does the wear count from the current state then? So the first lap = 8% of the 100%, the second lap would degrade them by 8% of 92% = 7.36% etc? Although this should still be off a bit, as it "should" be a continuous process, not just counted at the end of each lap.
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medal 5000
6 years 252 days ago
Yes, roughly that's it and as you mentioned it's a continuous process. Additionally there's some rounding involved as well so if it tells you 8% the starting value could be anything between 7.5% and 8.49%.
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medal 5000
6 years 252 days ago
Dont do it, you will end up racing like me and I can tell you it's not very fast. :D

Australia
8 SS
16 S
24 M

Malaysia
12 S
18 M
24 H

China
14 S
21 M
28 H

Bahrain
7 SS
14 S
21 M

Spain
14 S
21 M
28 H

Monaco
14 SS
28 S
42 M

Turkey
12 S
18 M
24 H

UK
8 SS
16 S
24 M

Germany
8 SS
16 S
24 M

Hungary
10 SS
20 S
30 M

Europe
8 SS
16 S
24 M

Belgium
10 S
15 M
20 H

Italy
8 SS
16 S
24 M

Singapore
8 SS
16 S
24 M

Japan
7 SS
14 S
21 M

Brazil
9 SS
18 S
27 M

Dahbi
7 SS
14 S
21 M
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medal 5000
6 years 174 days ago (edited 6 years 174 days ago)
I calculate my tire wear down every race. I see times drop when tire condition drops low (40-0%). Mostly i race secure and wear them down to 20/15%. In my competion i feel tho that its to easy to win by wearing them down to almost 0 and thereby taking more risks. i think im racing on the edge, some race over the edge and then get rewarded. And i do have one of the best develeped cars and best trained/experienced riders... Is there anyone els that experiences this?
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medal 5000 Moderator
6 years 173 days ago
Not as such, but I think your too easy to win is because of your car and drivers superiority or in other words lack of competition. Usually wearing a tyre down below 20%, or already above that with anything other than super softs, is a very risky thing because while it allows you to do more laps than the competition you loose more time due to worn tyres than you gain by those extra laps. With some exceptions like if doing so is the key allowing for an overall superior strategy.
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medal 5000
6 years 173 days ago
My cars start getting slower once the tyre goes past 50% health. That includes Inters & wets.
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medal 5000
6 years 173 days ago
Tyres Annoy me

SS 6 Laps
S 12 Laps
M jumps up a lot 25 instead of 18 Laps
H jumps up more again 33 instead of 24 Laps
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medal 5780
6 years 173 days ago
James
Tyres Annoy me

SS 6 Laps
S 12 Laps
M jumps up a lot 25 instead of 18 Laps
H jumps up more again 33 instead of 24 Laps


That's because the amount of tyre degradation after the initial laps goes down steadily.
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medal 5000
6 years 173 days ago (edited 6 years 173 days ago)
Yunus
James
Tyres Annoy me

SS 6 Laps
S 12 Laps
M jumps up a lot 25 instead of 18 Laps
H jumps up more again 33 instead of 24 Laps


That's because the amount of tyre degradation after the initial laps goes down steadily.


It's not counted for in SS or S so why is it took into account for M & H

Count backwards
H 33 Laps
M 25 Laps is -8 from hard
S 17 Laps is -8 from medium
SS 9 Laps is -8 from soft
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medal 5000
6 years 173 days ago
Ok I just confusing the thing lol
70% of 33 = 23.1 that's why I said Hard tyres jump up 33 instead of 24 Laps
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medal 5719
6 years 173 days ago
Without a decimal point, 3% on hards is between 3.0 and 3.99 that gives around a 30% margin of error.

Because wear isn't linear, after 33 laps you will have somewhere around 26% to 36% left and not 1%.





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medal 5000
6 years 173 days ago
If you have race data, you can use regression to find the more-or-less exact value of tyre wear under racing conditions.
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medal 5000
6 years 172 days ago (edited 6 years 172 days ago)
Don't like the sound of still having more life.
Surly 4 stints of SS should be equal to 1 stint of H
3 stints of S = 1 of H
2 stints of M = 1 of H
It's meant to be simple lol
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medal 5001 Super Mod
6 years 172 days ago (edited 6 years 171 days ago)
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medal 6095 Super Mod
6 years 172 days ago
Amazing job! Congratulations Kevin.
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medal 5000
6 years 172 days ago
Belo debate
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medal 5001 Super Mod
6 years 171 days ago
Here's Softs degredation. Obviously Tyre Wear development will play a bit of a part but it gives you an idea. Although all circuits are included I don't have data for all so some have no trend line.

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medal 5000
6 years 171 days ago
Nope! Don't like it, using over 50% tyre life is too slow.
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