2022 Tyres Thread

Here are our CFD links and discussions about aerodynamics, suspension, driver safety and tyres. Please stick to F1 on this forum.
Manoah2u
Manoah2u
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Re: 18-inch wheels to be introduced in 2021.

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offtopic but

Image

look at that gorgeous machine 8) 8) 8)
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FW17
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Joined: 06 Jan 2010, 10:56

Re: 18-inch wheels to be introduced in 2021.

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Manoah2u wrote:
16 Oct 2019, 23:08
offtopic but

Image

look at that gorgeous machine 8) 8) 8)

I think those are 15 inch wheels

But I would love to see those front wing endplates for 2021

mzso
mzso
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Joined: 05 Apr 2014, 14:52

Re: 18-inch wheels to be introduced in 2021.

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Disappointment... They didn't get rid of tire blankets after all.

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jjn9128
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Re: 18-inch wheels to be introduced in 2021.

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mzso wrote:
01 Nov 2019, 13:49
Disappointment... They didn't get rid of tire blankets after all.
Pirelli couldn't do it :lol:
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Holm86
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Joined: 10 Feb 2010, 03:37
Location: Copenhagen, Denmark

Re: 18-inch wheels to be introduced in 2021.

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mzso wrote:
01 Nov 2019, 13:49
Disappointment... They didn't get rid of tire blankets after all.
More disappointing that they introduce 18" tires for "modern day looks" and then cover them up #-o #-o

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FW17
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Re: 18-inch wheels to be introduced in 2021.

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Holm86 wrote:
01 Nov 2019, 14:56
mzso wrote:
01 Nov 2019, 13:49
Disappointment... They didn't get rid of tire blankets after all.
More disappointing that they introduce 18" tires for "modern day looks" and then cover them up #-o #-o

They are not covering the tyre

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Holm86
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Joined: 10 Feb 2010, 03:37
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Re: 18-inch wheels to be introduced in 2021.

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FW17 wrote:
01 Nov 2019, 15:06
Holm86 wrote:
01 Nov 2019, 14:56
mzso wrote:
01 Nov 2019, 13:49
Disappointment... They didn't get rid of tire blankets after all.
More disappointing that they introduce 18" tires for "modern day looks" and then cover them up #-o #-o

They are not covering the tyre
Okay, I ment rims

mzso
mzso
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Re: 18-inch wheels to be introduced in 2021.

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Holm86 wrote:
01 Nov 2019, 14:56
mzso wrote:
01 Nov 2019, 13:49
Disappointment... They didn't get rid of tire blankets after all.
More disappointing that they introduce 18" tires for "modern day looks" and then cover them up #-o #-o
They did that because all tire manufacturers were for it. I also think there were some mechanical reasons.
The wobbly broad sidewalls with the present small rims don't seem that advantageous for anything besides weight.

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henry
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Joined: 23 Feb 2004, 20:49
Location: England

Re: 18-inch wheels to be introduced in 2021.

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mzso wrote:
01 Nov 2019, 23:53
Holm86 wrote:
01 Nov 2019, 14:56
mzso wrote:
01 Nov 2019, 13:49
Disappointment... They didn't get rid of tire blankets after all.
More disappointing that they introduce 18" tires for "modern day looks" and then cover them up #-o #-o
They did that because all tire manufacturers were for it. I also think there were some mechanical reasons.
The wobbly broad sidewalls with the present small rims don't seem that advantageous for anything besides weight.
A further advantage of the wobbly broad sidewalks is that they allow the tyre contact patch to be larger and to conform more to irregularities in the track. It is for this reason that the overall tyre diameter has been increased as well as the rim size. They will struggle to match the current levels of traction on exit kerbs, it may be that drivers will use less kerb because of this.
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MatsNorway
MatsNorway
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Re: 18-inch wheels to be introduced in 2021.

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Nice Henry. Never thought about them using less curb by going down in profile
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JordanMugen
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Joined: 17 Oct 2018, 13:36

Re: 18-inch wheels to be introduced in 2021.

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henry wrote:
02 Nov 2019, 13:01
A further advantage of the wobbly broad sidewalks is that they allow the tyre contact patch to be larger and to conform more to irregularities in the track.
I hear this theory sometimes, but may I ask for data, articles or studies to back up the idea that a high profile tyre provides a bigger contact patch for a given tyre width & pressure and therefore more traction and/or lateral grip? :?:

These are the rear tyres used by the sportscars made by the F1 competitors:
  • Ferrari 488: 305/30 ZR20 (20" diameter radial, 305mm wide, 30% profile, Z speed rating)
  • McLaren 720S: 305/30 R20
  • Mercedes AMG GT R: 325/30 R20
  • Honda NSX: 305/30 R20
Surely knowledgable F1 manufacturers like McLaren, Ferrari, Mercedes, and Honda wouldn't specify a very low 30% profile rear tyre if a higher profile rear tyre would provide more traction for their over powerful sportscars!?

Bare in mind, that F1 uses radial tyres since the 1980's, where the belts are only under the tread surface, and not crossply tyres where the belts go around the sidewalls.
Last edited by JordanMugen on 04 Nov 2019, 13:38, edited 3 times in total.

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Holm86
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Joined: 10 Feb 2010, 03:37
Location: Copenhagen, Denmark

Re: 18-inch wheels to be introduced in 2021.

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henry wrote:
02 Nov 2019, 13:01

A further advantage of the wobbly broad sidewalks is that they allow the tyre contact patch to be larger and to conform more to irregularities in the track. It is for this reason that the overall tyre diameter has been increased as well as the rim size. They will struggle to match the current levels of traction on exit kerbs, it may be that drivers will use less kerb because of this.
If they use less curb, thats just a bonus, im pretty tired of watching the drives drive so much "off track"

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Thunder
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Re: 18-inch wheels to be introduced in 2021.

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I don't see LMP1 use less Kerbs though..... It's jut a matter of good Suspension Setup.
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henry
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Joined: 23 Feb 2004, 20:49
Location: England

Re: 18-inch wheels to be introduced in 2021.

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JordanMugen wrote:
04 Nov 2019, 13:28
henry wrote:
02 Nov 2019, 13:01
A further advantage of the wobbly broad sidewalks is that they allow the tyre contact patch to be larger and to conform more to irregularities in the track.
I hear this theory sometimes, but may I ask for data, articles or studies to back up the idea that a high profile tyre provides a bigger contact patch for a given tyre width & pressure and therefore more traction and/or lateral grip? :?:

These are the rear tyres used by the sportscars made by the F1 competitors:
  • Ferrari 488: 305/30 ZR20 (20" diameter, 305mm wide, 30% profile)
  • McLaren 720S: 305/30 R20
  • Mercedes AMG GT R: 325/30 R20
  • Honda NSX: 305/30 R20
Surely knowledgable F1 manufacturers like McLaren, Ferrari, Mercedes, and Honda wouldn't specify a very low 30% profile rear tyre if a higher profile rear tyre would provide more traction for their over powerful sportscars!?
I’m not sure you can compare road going sports cars with the ultimate in track car. There are many factors for a road going car other than outright performance.

At least one F1 engineer gave an interview in which he raised the issue of tyre conformance and kerb traction. I’ll try to find it.

In the meantime it’s worth noting that when Ferrari kit out for their clients to go 488s go racing they wear 315/705 19”. Smaller rims and larger OD with a taller sidewall. Equivalent to 35% profile. So a knowledgeable F1 manufacturer does something different when outright performance is the goal.

https://races.ferrari.com/en/corse-clie ... challenge/
Fortune favours the prepared; she has no favourites and takes no sides.
Truth is confirmed by inspection and delay; falsehood by haste and uncertainty : Tacitus

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JordanMugen
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Joined: 17 Oct 2018, 13:36

Re: 18-inch wheels to be introduced in 2021.

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henry wrote:
04 Nov 2019, 14:27
In the meantime it’s worth noting that when Ferrari kit out for their clients to go 488s go racing they wear 315/705 19”.
That's interesting. I think it could just be because the 19" wheels are lighter, while still being large enough to clear the brakes.

In my experience, having tried out 18" 40%, 17" 45% and 16" 50% tyres all of 225mm width on the same road car, the 18" tyres provided the most precise handling, the 17" tyres were in the middle (but I selected them as the 17" forged wheels were 2.5kg lighter than the OEM 18" wheels) and the 16" tyres, which were the minimum size to the clear the (small) 12" brakes, had noticeable slop, delay and vagueness in handling (not enough to compensate for the advantages of the 16" wheel being 3.5kg lighter than the OEM wheel).

Of course, different makes and model of tyre vary in their sidewall stiffness.

There was certainly not any increase in traction or grip with the 16" tyre compared to the 18".