Tire symbol above weather/rain indicator?

[double0bokf]

During races, the driver info panel has a section for letting you know how wet the roads are. What does the tire symbol mean above that (in grey)? How does it affect performance and what information should I be getting from it?

[miketsukami bo.]

It's rubber on track. The more rubber on track there is, the faster the cars can go.

If you're having trouble with the UI, in the screens with tutorials, you can always look again at the tutorials by pressing the ( i ) ℹ️ button in the bottom right corner.

[Stefandreus]

Tyre symbol next to rain indicator...what does it mean?

Sorry, probably it's already been posted but i still don't get it
The grey graph (opposite of the water on the track)...what does exactly mean?
I noticed that in some tracks with that symbol, the race is very slow, since i'm ignorant about F1 i was wondering if it's rubber left by cars, or the track is very dry/hot and the tyres wear off more quickly...since the cars aren't as fast like in other tracks i guess that's it, but i'm not sure
Also, what tyres should i use in these case? It does matter anyway when the race is "slower"? Obviously if the tyres wear off faster i should go with the hard tyres but i'm not sure
thanks in advance and sorry if already explained

[DemonicSquid]

The challenge is getting to the end of a race as quickly as possible of course, you need to find a balance between longer stints using hard tyres with less performance, and shorter ones using soft and medium tyres. You also need to take into account the time lost taking pit-stops, so if you're a slower car you may find it better to run hard tyres for most of the race so you only pit once or twice saving yourself time, however, you need to calculate how much slower or faster you are than your rivals so that you can weigh this against the time lost or gained by stopping for different tyres.

As far as I can tell, the rubbering in of the track only makes cars faster, it has no effect on wear which comes from the track itself.