Shopping Tires for e90 ZCP and spacers

biasrutus · 03-04-2017, 08:33 AM

Looking for feedback, all help appreciated!

I am about to buy new tires and think I want the GTS setup. The tire selection is limited though. I am not look for the actual GTS tires as I want to get some life out of the tires.

I have a ZCP with 12mm spacers in the front and 10mm in the back.

I am considering these two setups:
OEM setup of 245/35/19 and 265/35/19 with Pilot Sport 4s
vs
GTS setup of 255/35/19 and 285/30/19 with Potenza S-04 Pole Position (16 total pounds heavier)

cart screenshot

What I am trying to figure out:

Do I want the GTS setup more or the Pilot Sports more?
If I go with the GTS, will my spacers need to be removed or changed?

biasrutus · 03-06-2017, 04:51 AM

Using this site: https://tiresize.com/comparison/ it looks like GTS tires sizes are .8 in wider (20mm) in the rear and .4 in (10mm) in the front.

Seems like the tires would be an additional 10mm closer to my fender in the rear and 5mm closer in the front.

I am assuming this would be like running 17mm front spacers and 20mm rear spacers.

Then I found this post: http://www.m3post.com/forums/showpos...7&postcount=12

GeorgeA · 03-06-2017, 05:29 AM

I think a lot of people do 255/35 and 275/35 on ZCP wheels and PS4S comes in that size.

becausephilchow · 03-07-2017, 12:42 AM

I would run 255/275. You can still run, I believe, a 12MM/10MM setup even with the +1 sizes. Could be wrong, I looked into it a long time ago.

I know people were able to run 15MM/12MM on 245/265 sizes.

Keep in mind, this is with the OEM 220M, which are 8.5/9.5. When you run a 255/275, it runs "beefier/fatter" than it would on a 9/10 ZCP Setup.

Also depends on how low you are, but, I'm leaning towards 12MM Front and 10MM Rear to be OK with 255/275 on ZCP Wheels.

As for GTS Wheel sizes, truthfully, I don't really like that for a non-GTS Vehicle. Why? Because our cars are coded from factory, the speedo and mileage counter, to recognize 246/265. The GTS from factory, surely is coded to recognize the 255/285 setup, which has a slightly different aspect ratio.

OEM Sizes = 1.081
GTS Sizes = 0.958

biasrutus · 03-07-2017, 06:26 AM

Pulled the trigger on:

MICHELIN PILOT SPORT 4S
Front: 245/35ZR19
Rear: 275/35ZR19

I am looking forward to being able to have traction again!

becausephilchow · 03-07-2017, 09:32 AM

Quote:

Originally Posted by biasrutus

Pulled the trigger on:

MICHELIN PILOT SPORT 4S
Front: 245/35ZR19
Rear: 275/35ZR19

I am looking forward to being able to have traction again!

Should size up to 255/35/19 up front, but that's just my opinion.

03-04-2017, 08:33 AM	#1
biasrutus driver 20 Rep 48 Posts Drives: 2011 e90 M3 Join Date: Feb 2016 Location: TX iTrader: (3)	Shopping Tires for e90 ZCP and spacers Looking for feedback, all help appreciated! I am about to buy new tires and think I want the GTS setup. The tire selection is limited though. I am not look for the actual GTS tires as I want to get some life out of the tires. I have a ZCP with 12mm spacers in the front and 10mm in the back. I am considering these two setups: OEM setup of 245/35/19 and 265/35/19 with Pilot Sport 4s vs GTS setup of 255/35/19 and 285/30/19 with Potenza S-04 Pole Position (16 total pounds heavier) cart screenshot What I am trying to figure out: Do I want the GTS setup more or the Pilot Sports more? If I go with the GTS, will my spacers need to be removed or changed? Last edited by biasrutus; 03-06-2017 at 04:25 AM..
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03-06-2017, 04:51 AM	#2
biasrutus driver 20 Rep 48 Posts Drives: 2011 e90 M3 Join Date: Feb 2016 Location: TX iTrader: (3)	Using this site: https://tiresize.com/comparison/ it looks like GTS tires sizes are .8 in wider (20mm) in the rear and .4 in (10mm) in the front. Seems like the tires would be an additional 10mm closer to my fender in the rear and 5mm closer in the front. I am assuming this would be like running 17mm front spacers and 20mm rear spacers. Then I found this post: http://www.m3post.com/forums/showpos...7&postcount=12
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03-06-2017, 05:29 AM	#3
GeorgeA Major 757 Rep 1,408 Posts Drives: E92 M3 Join Date: Jan 2016 Location: Los Angeles iTrader: (3)	I think a lot of people do 255/35 and 275/35 on ZCP wheels and PS4S comes in that size.
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03-07-2017, 12:42 AM	#4
becausephilchow Lieutenant 175 Rep 513 Posts Drives: 08 E90 M3 Join Date: Mar 2014 Location: Hong Kong iTrader: (2)	I would run 255/275. You can still run, I believe, a 12MM/10MM setup even with the +1 sizes. Could be wrong, I looked into it a long time ago. I know people were able to run 15MM/12MM on 245/265 sizes. Keep in mind, this is with the OEM 220M, which are 8.5/9.5. When you run a 255/275, it runs "beefier/fatter" than it would on a 9/10 ZCP Setup. Also depends on how low you are, but, I'm leaning towards 12MM Front and 10MM Rear to be OK with 255/275 on ZCP Wheels. As for GTS Wheel sizes, truthfully, I don't really like that for a non-GTS Vehicle. Why? Because our cars are coded from factory, the speedo and mileage counter, to recognize 246/265. The GTS from factory, surely is coded to recognize the 255/285 setup, which has a slightly different aspect ratio. OEM Sizes = 1.081 GTS Sizes = 0.958
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03-07-2017, 06:26 AM	#5
biasrutus driver 20 Rep 48 Posts Drives: 2011 e90 M3 Join Date: Feb 2016 Location: TX iTrader: (3)	Pulled the trigger on: MICHELIN PILOT SPORT 4S Front: 245/35ZR19 Rear: 275/35ZR19 I am looking forward to being able to have traction again!
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