Tire Wear - The Experiment

  • Thread starter Jimmy_Pop
  • 45 comments
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It's a shame there's no skidpad with the ability to properly acquire such data. That, however, is limited primarily to lateral grip (except in cases of severe push, in which case there can be a loss of linear grip on both ends) and track time results in linear grip loss as well.
 
Jimmy_Pop
It could be done, it would take a whole lot longer than the 20 or so minutes my little experiment took. I think that picking a track that has a fairly good balance of turns (for even wear) and car that would be drivable accross all tire grades, it could be a good test. Maybe I will do it, with a little help from the folks here of how you all think the best way to do it, I can put it together on my next paid holiday! (just the thought of getting paid to play video games makes me :)
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I was more like thinking that your current experiment is good enough to use as a base for how many percent each tyre deteriorate faster than the hardest compound. From such a list, a percentage between each compound can be calculated.
 
Mt. Lynx
I was more like thinking that your current experiment is good enough to use as a base for how many percent each tyre deteriorate faster than the hardest compound. From such a list, a percentage between each compound can be calculated.
Click to expand...
That's already in the data in the second post. :)
Namely:
Jimmy_Pop
Here is a more detailed analysis between each grade:
View attachment 241935
Click to expand...

RS has a value of 100, so all the other values are effectively normalised to percent. I.e. CH tyres last 6.57 times as long as RS tyres (or RS tyres last 1/6.57 times as long as CH, or wear 6.57 times faster).

You could normalise to CH instead, of course, as you suggest, and this table summarises both:
Code: 
Tyre | RS  |  CH
-------------------
CH   | 657 | 100.0
CM   | 507 |  77.2
CS   | 407 |  61.9
SH   | 336 |  51.1
SM   | 221 |  33.6
SS   | 171 |  26.0
RH   | 180 |  27.4
RM   | 121 |  18.4
RS   | 100 |  15.2
All numbers are effectively percentages, and the column headings refer to the tyre used as the basis. The numbers are really the same, just rescaled by 657 one way or the other, so all the data you need is in there already, as you said.

It's possible to infer the relative difference between other tyres, e.g SM tyres last 1/3 of the time of CH, SH last almost twice as long as SS, and therefore about 3/2 as long as SM, with SM lasting roughly 4/3 as long as SS (check: 3/2 * 4/3 = 2).
You could quite quickly put the first column of that table into a spreadsheet and then devise a 9x9 matrix of relative grip values normalised for all "compounds" if you were so inclined. Try it. ;)


These figures are provisional based on the specific test method used, remember.
 
If we take the soft compound of each tire grade and set to 100, you get the following multpliers within each tire grade:

RS - 1.00
RM - 1.21 (effectively 121% etc.)
RH - 1.80

SS - 1.00
SM - 1.29
SH - 1.96

CS - 1.00
CM - 1.25
CH - 1.61
 
Last edited:
Johnnypenso
If we take the soft compound of each tire grade and set to 100, you get the following multpliers within each tire grade:

RS - 1.00
RM - 1.21 (effectively 121% etc.)
RH - 1.80

SS - 1.00
SM - 1.29
SH - 1.96

CS - 1.00
CM - 1.25
CH - 1.61
Click to expand...
That's quite a useful representation. To complete:

RS - 1.00
SS - 1.71
CS - 4.07

I think it's clear from that that S-tyres are not really road tyres, given the most durable S tyre is half as durable as the softest C-tyres (which we know are pretty grippy by real standards)! EDIT: Schoolboy error, the SHs last about 80% as long as CSs, see below.

The non linear division within the types is clear, also; 1.21^2 is less than 1.80, for instance; 1.80 is more like 1.21^3. I wonder if the difference in "grip level" is the same.

EDIT: Bonus relative durability matrix:
Code: 
---------------------------------------------------------------
|    |  CH    CM    CS  |  SH    SM    SS  |  RH    RM    RS  |
|----|------------------|------------------|------------------|
|    |                  |                  |                  |
| CH | 1.00  1.30  1.61 | 1.96  2.97  3.84 | 3.65  5.43  6.57 |
|    |                  |                  |                  |
| CM | 0.77  1.00  1.25 | 1.51  2.29  2.96 | 2.82  4.19  5.07 |
|    |                  |                  |                  |
| CS | 0.62  0.80  1.00 | 1.21  1.84  2.38 | 2.26  3.36  4.07 |
|    |                  |                  |                  |
|----|------------------|------------------|------------------|
|    |                  |                  |                  |
| SH | 0.51  0.66  0.83 | 1.00  1.52  1.96 | 1.87  2.78  3.36 |
|    |                  |                  |                  |
| SM | 0.34  0.44  0.54 | 0.66  1.00  1.29 | 1.23  1.83  2.21 |
|    |                  |                  |                  |
| SS | 0.26  0.34  0.42 | 0.51  0.77  1.00 | 0.95  1.41  1.71 |
|    |                  |                  |                  |
|----|------------------|------------------|------------------|
|    |                  |                  |                  |
| RH | 0.27  0.36  0.44 | 0.54  0.81  1.05 | 1.00  1.49  1.80 |
|    |                  |                  |                  |
| RM | 0.18  0.24  0.30 | 0.36  0.55  0.71 | 0.67  1.00  1.21 |
|    |                  |                  |                  |
| RS | 0.15  0.20  0.25 | 0.30  0.45  0.58 | 0.56  0.83  1.00 |
|    |                  |                  |                  |
---------------------------------------------------------------

CSV
"","CH","CM","CS","SH","SM","SS","RH","RM","RS"
"CH",1.00,1.30,1.61,1.96,2.97,3.84,3.65,5.43,6.57
"CM",0.77,1.00,1.25,1.51,2.29,2.96,2.82,4.19,5.07
"CS",0.62,0.80,1.00,1.21,1.84,2.38,2.26,3.36,4.07
"SH",0.51,0.66,0.83,1.00,1.52,1.96,1.87,2.78,3.36
"SM",0.34,0.44,0.54,0.66,1.00,1.29,1.23,1.83,2.21
"SS",0.26,0.34,0.42,0.51,0.77,1.00,0.95,1.41,1.71
"RH",0.27,0.36,0.44,0.54,0.81,1.05,1.00,1.49,1.80
"RM",0.18,0.24,0.30,0.36,0.55,0.71,0.67,1.00,1.21
"RS",0.15,0.20,0.25,0.30,0.45,0.58,0.56,0.83,1.00
 
Last edited:
raven214
Serious question. Where are you testing this - i.e. are you sure tire wear is on?
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yes it s on and i m testing in an online room
the tires wear out the same speed the only thing is that with harder compound the lap time is slower
the only series that is not like that is Nascar
 
chill
yes it s on and i m testing in an online room
the tires wear out the same speed the only thing is that with harder compound the lap time is slower
the only series that is not like that is Nascar
Click to expand...
What cars are yielding equal wear across tire grades? Not saying that your tires wear evenly, but the longevity.
 
TexasTyme214
I don't feel this either. It's easy to burn up the tires in the car for sure, but once I go below the limit, I definitely see different wear rates.
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yes i understand but when you re in a 300+ Km race it s hard to stay Under the limit loll
 

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