Tire question

juicehound · 06-25-2019, 09:33 PM

hey guys

i have just purchased a set of 763m wheels off of a cs for my 2015 M4 in CGM

they are currently new take off and are wrapped in pilot super sports

oem sizing is as follows:
front: 255/35/19
rear: 285/30/20

i am looking to swap them out for pilot sport 4s tires

i have stock suspension

what is the best tire size to go with ?

same as OEM

or

265/35/19
295/30/20

or something else ?

Thanks !

Justin

Suds · 06-25-2019, 09:41 PM

I would run what you bought and see how the car handles, then figure out if you want to change things.

I've done 40+ track days in M4, there are so many parameters with tires alone, sort these out first, it's free.

juicehound · 06-25-2019, 09:43 PM

i would rather not do that due to the fact that i won't be able to sell the tires as new if i drive on them at the track - since i am looking for PS4S tires due to better wet performance as well as more drivability, as this is my DD, it comes down to what sizing is best for max grip without rubbing and without diminished performance

PayamFSU · 07-07-2019, 08:06 AM

Quote:

Originally Posted by juicehound

i would rather not do that due to the fact that i won't be able to sell the tires as new if i drive on them at the track - since i am looking for PS4S tires due to better wet performance as well as more drivability, as this is my DD, it comes down to what sizing is best for max grip without rubbing and without diminished performance

I wouldn't track ps4s tires if it's your daily, that's a bad idea

juicehound · 07-09-2019, 08:22 PM

why is that ?

CRRobert · 07-09-2019, 08:30 PM

I have run 9 track sessions with PS4S and daily them. I do have camber plates running front at -2.4 degrees. Run BMWCCA C/B group. Couple thousand miles and they are 7/32 to 8/32. They do fall off at the end of the session and looking at getting something for my next events end of August.

CRRobert · 07-09-2019, 08:34 PM

Running 265/35/19 F and 305/30/19 R on apex sm-10, and lowered on MP HAS

NYG · 07-09-2019, 08:35 PM

Do not waste your money buying 4S tires for track use.

It's NOT a good track tire. It's a superb street tire and it's manageable on a track but a complete waste of $$$ for track use.

06-25-2019, 09:33 PM	#1
juicehound Second Lieutenant 35 Rep 233 Posts Drives: 2015 BMW M4 Join Date: Nov 2016 Location: CT iTrader: (0)	Tire question - track day friday ! ! hey guys i have just purchased a set of 763m wheels off of a cs for my 2015 M4 in CGM they are currently new take off and are wrapped in pilot super sports oem sizing is as follows: front: 255/35/19 rear: 285/30/20 i am looking to swap them out for pilot sport 4s tires i have stock suspension what is the best tire size to go with ? same as OEM or 265/35/19 295/30/20 or something else ? Thanks ! Justin
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06-25-2019, 09:41 PM	#2
Suds /M Enthusiast 1603 Rep 1,619 Posts Drives: Responsiblish Join Date: Aug 2010 Location: Lone Star State iTrader: (1)	I would run what you bought and see how the car handles, then figure out if you want to change things. I've done 40+ track days in M4, there are so many parameters with tires alone, sort these out first, it's free. __________________ 2019 M2 Comp, Alpine White, DCT, track car build, 1/2 cage, AP Racing Brakes & Nitron Coilovers, BM3 Stage 1 93 Oct. 2018 Porsche Cayman GTS, Night Blue Metalic, PDK, COBB tuned 93 Oct. 2004 Audi A4 Avant USP 6mt, RS4 clutch, built motor, Garrett GT3071r "Big Ass Turbo" Motoza Tune
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06-25-2019, 09:43 PM	#3
juicehound Second Lieutenant 35 Rep 233 Posts Drives: 2015 BMW M4 Join Date: Nov 2016 Location: CT iTrader: (0)	i would rather not do that due to the fact that i won't be able to sell the tires as new if i drive on them at the track - since i am looking for PS4S tires due to better wet performance as well as more drivability, as this is my DD, it comes down to what sizing is best for max grip without rubbing and without diminished performance
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07-09-2019, 08:22 PM	#5
juicehound Second Lieutenant 35 Rep 233 Posts Drives: 2015 BMW M4 Join Date: Nov 2016 Location: CT iTrader: (0)	why is that ?
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07-09-2019, 08:30 PM	#6
CRRobert Private First Class 55 Rep 193 Posts Drives: 18 Avus Blue ZCP M3 Join Date: Dec 2018 Location: Denver, CO iTrader: (0)	I have run 9 track sessions with PS4S and daily them. I do have camber plates running front at -2.4 degrees. Run BMWCCA C/B group. Couple thousand miles and they are 7/32 to 8/32. They do fall off at the end of the session and looking at getting something for my next events end of August.
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07-09-2019, 08:34 PM	#7
CRRobert Private First Class 55 Rep 193 Posts Drives: 18 Avus Blue ZCP M3 Join Date: Dec 2018 Location: Denver, CO iTrader: (0)	Running 265/35/19 F and 305/30/19 R on apex sm-10, and lowered on MP HAS
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07-09-2019, 08:35 PM	#8
NYG Brigadier General 10918 Rep 3,750 Posts Drives: Audi R8 Join Date: Feb 2017 Location: Brooklyn, NY iTrader: (0)	Do not waste your money buying 4S tires for track use. It's NOT a good track tire. It's a superb street tire and it's manageable on a track but a complete waste of $$$ for track use.
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