18-inch wheels to be introduced in 2021.

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Manoah2u
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Re: 18-inch wheels to be introduced in 2021.

Post by Manoah2u » Wed Oct 16, 2019 10:08 pm

offtopic but

Image

look at that gorgeous machine 8) 8) 8)
Dumpster sounds so much more classy. It's the diamond of the cesspools.

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

Post by FW17 » Thu Oct 17, 2019 6:32 am

Manoah2u wrote:
Wed Oct 16, 2019 10:08 pm
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
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Re: 18-inch wheels to be introduced in 2021.

Post by mzso » Fri Nov 01, 2019 12:49 pm

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

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

Post by jjn9128 » Fri Nov 01, 2019 12:51 pm

mzso wrote:
Fri Nov 01, 2019 12:49 pm
Disappointment... They didn't get rid of tire blankets after all.
Pirelli couldn't do it :lol:
#aerogandalf

Holm86
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Re: 18-inch wheels to be introduced in 2021.

Post by Holm86 » Fri Nov 01, 2019 1:56 pm

mzso wrote:
Fri Nov 01, 2019 12:49 pm
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

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

Post by FW17 » Fri Nov 01, 2019 2:06 pm

Holm86 wrote:
Fri Nov 01, 2019 1:56 pm
mzso wrote:
Fri Nov 01, 2019 12:49 pm
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

Holm86
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Re: 18-inch wheels to be introduced in 2021.

Post by Holm86 » Fri Nov 01, 2019 2:12 pm

FW17 wrote:
Fri Nov 01, 2019 2:06 pm
Holm86 wrote:
Fri Nov 01, 2019 1:56 pm
mzso wrote:
Fri Nov 01, 2019 12:49 pm
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
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Re: 18-inch wheels to be introduced in 2021.

Post by mzso » Fri Nov 01, 2019 10:53 pm

Holm86 wrote:
Fri Nov 01, 2019 1:56 pm
mzso wrote:
Fri Nov 01, 2019 12:49 pm
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.

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

Post by henry » Sat Nov 02, 2019 12:01 pm

mzso wrote:
Fri Nov 01, 2019 10:53 pm
Holm86 wrote:
Fri Nov 01, 2019 1:56 pm
mzso wrote:
Fri Nov 01, 2019 12:49 pm
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.
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

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

Post by MatsNorway » Sat Nov 02, 2019 12:35 pm

Nice Henry. Never thought about them using less curb by going down in profile
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JordanMugen
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Re: 18-inch wheels to be introduced in 2021.

Post by JordanMugen » Mon Nov 04, 2019 12:28 pm

henry wrote:
Sat Nov 02, 2019 12:01 pm
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 Mon Nov 04, 2019 12:38 pm, edited 3 times in total.

Holm86
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Re: 18-inch wheels to be introduced in 2021.

Post by Holm86 » Mon Nov 04, 2019 12:33 pm

henry wrote:
Sat Nov 02, 2019 12:01 pm

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

Post by Thunder » Mon Nov 04, 2019 12:44 pm

I don't see LMP1 use less Kerbs though..... It's jut a matter of good Suspension Setup.
turbof1 wrote: YOU SHALL NOT......STALLLLL!!!
#aerogollum

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

Post by henry » Mon Nov 04, 2019 1:27 pm

JordanMugen wrote:
Mon Nov 04, 2019 12:28 pm
henry wrote:
Sat Nov 02, 2019 12:01 pm
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

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

Post by JordanMugen » Mon Nov 04, 2019 2:17 pm

henry wrote:
Mon Nov 04, 2019 1:27 pm
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".