Compared width of pilots 4s vs Pzero for spacer size calculations

dantm3 · 02-21-2022, 03:33 PM

So I kept reading up on Rubbing issues and spacers with different brands. I wanted to know the true difference in actual width of the tires so we can calculate rubbing issues with the spacers and what is true difference. Here are the specs and major differences from tire racks testing:
P-zero
Tread width of 9.2 inches
Pilots 4S
Tread with of 8.9 inches

If there is a .3 inch difference that in millimeters is 7.62. I would divide that in half because it is split on both sides of the tire.
So the P zero tires need roughly 3.8mm of clearance on the fender then the Michelin or another way to say it is you can run a 3.8mm bigger spacer on the Michelin which makes sense why a 12mm spacer rubs on a the p zero but 15 mm front spacer doesn’t on the Michelin…

Anyone see anything I missed?

Forzanerazzurri · 02-23-2022, 02:19 PM

Interesting to see that the Pzeros are wider, lighter (and have stiffer sidewalls). That Michelin marketing budget though...

iviegatron · 02-23-2022, 11:00 PM

I have Pirellis with 12mm up front and no rubbing. I'm also lowered and still no rubbing.

Team Tonka · 04-27-2022, 03:48 PM

From what I'm seeing some are running 12mm and 15mm up front with the Pirellis with no rubbing (I suppose that depends on how low the car is, and if trimming plastic at all - but seems folks can get it to work).

Sounds like its possible to run 15mm in the rear as well.

dirtyfreebooter · 04-28-2022, 08:21 AM

i have 12mm future classics on all 4 wheels. had 963m and michelin all seasons on, swapped back to the factory setup for summer, 826m and pzeros and i 100% rub. mostly notably when reversing out of parking spot and have wheel turned all the way

Team Tonka · 04-28-2022, 05:40 PM

Do you rub just in front? Lowered at all?

Quote:

Originally Posted by dirtyfreebooter

i have 12mm future classics on all 4 wheels. had 963m and michelin all seasons on, swapped back to the factory setup for summer, 826m and pzeros and i 100% rub. mostly notably when reversing out of parking spot and have wheel turned all the way

dirtyfreebooter · 04-28-2022, 11:50 PM

Quote:

Originally Posted by Team Tonka

Do you rub just in front? Lowered at all?

Quote:

Originally Posted by dirtyfreebooter

i have 12mm future classics on all 4 wheels. had 963m and michelin all seasons on, swapped back to the factory setup for summer, 826m and pzeros and i 100% rub. mostly notably when reversing out of parking spot and have wheel turned all the way

yea in the front. stock suspension

02-21-2022, 03:33 PM	#1
dantm3 Major 642 Rep 1,231 Posts Drives: 2022 M3 Xdrive Join Date: Mar 2010 Location: austin, tx iTrader: (0)	Compared width of pilots 4s vs Pzero for spacer size calculations So I kept reading up on Rubbing issues and spacers with different brands. I wanted to know the true difference in actual width of the tires so we can calculate rubbing issues with the spacers and what is true difference. Here are the specs and major differences from tire racks testing: P-zero Tread width of 9.2 inches Pilots 4S Tread with of 8.9 inches If there is a .3 inch difference that in millimeters is 7.62. I would divide that in half because it is split on both sides of the tire. So the P zero tires need roughly 3.8mm of clearance on the fender then the Michelin or another way to say it is you can run a 3.8mm bigger spacer on the Michelin which makes sense why a 12mm spacer rubs on a the p zero but 15 mm front spacer doesn’t on the Michelin… Anyone see anything I missed? Attached Images
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02-23-2022, 02:19 PM	#2
Forzanerazzurri Banned 6918 Rep 3,277 Posts Drives: E46 M3 Coupe/G80 M3CX Join Date: Jul 2021 Location: Alberta iTrader: (0) Garage List 2003 BMW M3 Coupe [0.50] 2022 BMW M3 Competi ... [5.12]	Interesting to see that the Pzeros are wider, lighter (and have stiffer sidewalls). That Michelin marketing budget though...
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02-23-2022, 11:00 PM	#3
iviegatron Lieutenant Colonel 2542 Rep 1,682 Posts Drives: G80 M3 Join Date: Jul 2021 Location: Richmond, TX iTrader: (0)	I have Pirellis with 12mm up front and no rubbing. I'm also lowered and still no rubbing.
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04-27-2022, 03:48 PM	#4
Team Tonka Second Lieutenant 133 Rep 264 Posts Drives: 2022 G80 M3 xDrive Comp. Join Date: Sep 2021 Location: Minnesota iTrader: (0)	From what I'm seeing some are running 12mm and 15mm up front with the Pirellis with no rubbing (I suppose that depends on how low the car is, and if trimming plastic at all - but seems folks can get it to work). Sounds like its possible to run 15mm in the rear as well.
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04-28-2022, 08:21 AM	#5
dirtyfreebooter Captain 341 Rep 655 Posts Drives: Vespa Join Date: Nov 2010 Location: Boulder, CO iTrader: (2)	i have 12mm future classics on all 4 wheels. had 963m and michelin all seasons on, swapped back to the factory setup for summer, 826m and pzeros and i 100% rub. mostly notably when reversing out of parking spot and have wheel turned all the way
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