RAC RG63 18x9/18x10 2?5F/265R? Michelin PSS

smmmurf · 04-06-2011, 07:20 PM

Tire sizing... should I go 245/265 stock, or upsize because of additional rim width?

I hear there are some DSC issues if I reduce the stagger. Will be going with the Michelin Pilot Super Sport.

Any input is greatly appreciated. Thank you!

AMPowerJ · 04-06-2011, 08:06 PM

255/35 and 275/35 are what you want.

Richbot · 04-06-2011, 08:08 PM

Should use 40-series on 18's with the 255's and 275's, 255/40-18 and 275/40-18 would be great, or you could do 265/35-18 or 275/35-18 front with 285 or 295/35-18 rears. 275's would be a little pinched in front but it wouldn't be too bad. Not sure of the offsets on the RAC's though they seem pretty conservative (i.e., not retardedly pushed out to the fenders). Depends on the tire too. PSS's probably won't be any wider or more square than the PS2's, they don't look it in photos

Width stagger isn't what freaks out the DSC, tire diameter changes which affect wheel speed does, and my car isn't "freaked" about 245/40-18 fronts and 275/40-18 rears, though it was slightly more sensitive when the rear tires were new.

monsta · 04-06-2011, 08:08 PM

i'm really upset I didn't jump on that e46 gb for a set of racs as track rims :mad:

smmmurf · 04-06-2011, 09:23 PM

Thanks for the comments all.

Ashley, thanks- however, I'm actually not looking to increase grip at all. I care about 2 things, steering response and ride quality. More width kinda goes against both. So I'm partial to stock sizes over going 265/285.

Rich- good idea but no 275/40R18 in Pilot Super Sport fitment

So my thoughts are either 265/35R18 front or 245/40R18 front... 265/35 may be too short still...

255 is out because not enough stagger I guess...?

Richbot · 04-06-2011, 09:39 PM

255 rear? Or front? I don't see a problem with that front with 265 rears, same concept as running square setup, diameters are closer to the same

smmmurf · 04-07-2011, 12:38 AM

I don't really think it's going to make a huge difference to anything if I just stick with stock sizes.

What's the effect on rolling diameter if I stick to 245 and stretch it .5" more on a 9" rim instead of 8.5"? 1%? 0.1%?

pbonsalb · 04-07-2011, 06:59 AM

You can find tire size calculators on the internet very easily. 245/40 matches up well to 265/35 and 265/40 matches up well to 285/35. If you can't get those sizes in the tire you want, consider another tire or another size.

Tires are recommended for certain widths. A 245/40/18 is measured on an 8.5 width wheel and is recommended for 8.0 to 9.5. If you run it on wider than measured spec, you gain 0.2 treadwith for each 0.5 inch added wheel width. Of course you also lose some sidewall flex and thus ride quality, but there is always a tradeoff and you can begin to see how the car makers compromised in choosing the factory sizes.

I have a set of the ARC8s coming in 18 x 9.5/10.5 and will probably reuse my nearly new PS2s in 245/40 and 265/40. They will be at the end of the recommended wheel width, but turn in should be improved and I am not convinced ride quality will be any worse than going down to a 35 series sidewall for a wider tire. My ideal choice was 265/35 and 285/35 but I could not sell my near new PS2s locally. Maybe I will change sizes for the next set.

calintexas · 04-07-2011, 08:29 AM

Quote:

Originally Posted by smmmurf

Tire sizing... should I go 245/265 stock, or upsize because of additional rim width?

I hear there are some DSC issues if I reduce the stagger. Will be going with the Michelin Pilot Super Sport.

Any input is greatly appreciated. Thank you!

You have the 18" RG63's that were done for the E46 M3, correct? If so, you should look at Radiation Joe's setup as he also has those wheels. He discusses his setup in posts #4049 & #4055: http://www.m3post.com/forums/showthread.php?t=234632

smmmurf · 04-07-2011, 08:41 AM

Quote:

Originally Posted by calintexas

You have the 18" RG63's that were done for the E46 M3, correct? If so, you should look at Radiation Joe's setup as he also has those wheels. He discusses his setup in posts #4049 & #4055: http://www.m3post.com/forums/showthread.php?t=234632

That is different, the PS2 has 275/40R18 fitment whereas that sizing is not available in PSS (yet).

Additionally the 275/40 sidewall looks way too fat.

Radiation Joe · 04-07-2011, 10:05 AM

Quote:

Originally Posted by smmmurf

That is different, the PS2 has 275/40R18 fitment whereas that sizing is not available in PSS (yet).

Additionally the 275/40 sidewall looks way too fat.

Man,
You hurt my feelings. Sidewalls too fat? That's like telling your wife that skirt makes her ass look fat.

255/40 PS2 and 275/40 PS2 15mm spacer in front

smmmurf · 04-07-2011, 10:07 AM

That looks pretty good. They still don't make a 275/40R18 though. I fear it would look fat on my car because I'm at stock height with no intentions of changing suspension whereas you're on Dinan springs I believe...

Additionally, 275/40R18 would definitely not fit on my E46 M3 which I want to be able to put the wheels on as well.

AMPowerJ · 04-07-2011, 02:36 PM

Sorry. I completely missed the fact you were talking about 18" and not 19" RACs.

Eugene-TAIWAN · 05-01-2011, 10:19 AM

if anything helps! I"m going with 265/35/18 on the front and 295/35/18 on the rear. I think this set up to me would be the best for daily and track + some mexico run

STALKER · 05-01-2011, 10:27 AM

I run PSS 255/35 275/35 on my 19" RACs. They run a bit more square then the PS2s, but not clearance issues at all.

Eugene-TAIWAN · 05-01-2011, 07:47 PM

Quote:

Originally Posted by STALKER

I run PSS 255/35 275/35 on my 19" RACs. They run a bit more square then the PS2s, but not clearance issues at all.

do you feel like they grip better? then the PS2?

smmmurf · 05-01-2011, 08:13 PM

I went from 245/265 PS2's to 245/265 PSS's and I can say undoubtedly that they grip better, ride better, are quieter, and respond quicker. 18" OEM to 18" RAC.

Eugene-TAIWAN · 05-01-2011, 10:04 PM

Quote:

Originally Posted by smmmurf

I went from 245/265 PS2's to 245/265 PSS's and I can say undoubtedly that they grip better, ride better, are quieter, and respond quicker. 18" OEM to 18" RAC.

wow! have you compared them to tires like RE-11 or NT-05/AD08?...

grip wise?

Radiation Joe · 05-02-2011, 08:19 PM

There is a huge discussion of tire options for the 18 inch RG63s here:

http://www.m3forum.net/m3forum/showthread.php?t=327012 (pics)

and here

http://www.m3forum.net/m3forum/showt...ight=inch+RG63 (group buy discussion)

These are e46 fitment discussions for the most part.

smmmurf · 05-03-2011, 02:43 PM

Quote:

Originally Posted by Eugene-TAIWAN

wow! have you compared them to tires like RE-11 or NT-05/AD08?...

grip wise?

No, I have never had those tires on my car.

I have had RE-01R's on a different car and I think the Michelin Pilot Super Sport has a comparable amount of grip and response while having a slightly better and quieter ride, but this is apples to oranges as my previous car was not even an M3- WRX STI.

The Super Sports are also very light which makes them the no brainer choice for this car.

04-06-2011, 07:20 PM	#1
smmmurf Colonel 370 Rep 2,197 Posts Drives: E92 M3 DCT 357k+ miles Join Date: Feb 2008 Location: Stanford, CA iTrader: (7)	RAC RG63 18x9/18x10 2?5F/265R? Michelin PSS Tire sizing... should I go 245/265 stock, or upsize because of additional rim width? I hear there are some DSC issues if I reduce the stagger. Will be going with the Michelin Pilot Super Sport. Any input is greatly appreciated. Thank you!
	Appreciate 0 Tweet Quote

04-06-2011, 08:06 PM	#2
AMPowerJ One mod leads to another ... 422 Rep 2,900 Posts Drives: 2014 F10 M5 Join Date: Apr 2008 Location: Blythewood, SC iTrader: (10)	255/35 and 275/35 are what you want. __________________ Current: 2014 F10 M5 Previous: 2015 F80 M3, 2013 E92 M3, 2013 F10 M5, 2009 E90 M3, 1998 E36 M3
	Appreciate 0 Quote

04-06-2011, 08:08 PM	#3
Richbot Major General 2768 Rep 5,483 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	Should use 40-series on 18's with the 255's and 275's, 255/40-18 and 275/40-18 would be great, or you could do 265/35-18 or 275/35-18 front with 285 or 295/35-18 rears. 275's would be a little pinched in front but it wouldn't be too bad. Not sure of the offsets on the RAC's though they seem pretty conservative (i.e., not retardedly pushed out to the fenders). Depends on the tire too. PSS's probably won't be any wider or more square than the PS2's, they don't look it in photos Width stagger isn't what freaks out the DSC, tire diameter changes which affect wheel speed does, and my car isn't "freaked" about 245/40-18 fronts and 275/40-18 rears, though it was slightly more sensitive when the rear tires were new. __________________
	Appreciate 0 Quote

04-06-2011, 08:08 PM	#4
monsta Brigadier General 221 Rep 3,592 Posts Drives: E92 M3 Join Date: Oct 2006 Location: Bergen County, NJ/Y.O, NY iTrader: (2)	i'm really upset I didn't jump on that e46 gb for a set of racs as track rims :mad: __________________ '08 E92 M3 6MT \| IB \| FR \| RAC RG63's \| VRS Ti Exhaust \| Fabspeed HFC & Xpipe '09 X5 35d SG/SB '11 X3 28i AW/CN/FW (wife's car
	Appreciate 0 Quote

04-06-2011, 09:23 PM	#5
smmmurf Colonel 370 Rep 2,197 Posts Drives: E92 M3 DCT 357k+ miles Join Date: Feb 2008 Location: Stanford, CA iTrader: (7)	Thanks for the comments all. Ashley, thanks- however, I'm actually not looking to increase grip at all. I care about 2 things, steering response and ride quality. More width kinda goes against both. So I'm partial to stock sizes over going 265/285. Rich- good idea but no 275/40R18 in Pilot Super Sport fitment So my thoughts are either 265/35R18 front or 245/40R18 front... 265/35 may be too short still... 255 is out because not enough stagger I guess...?
	Appreciate 0 Quote

04-06-2011, 09:39 PM	#6
Richbot Major General 2768 Rep 5,483 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	255 rear? Or front? I don't see a problem with that front with 265 rears, same concept as running square setup, diameters are closer to the same __________________
	Appreciate 0 Quote

04-07-2011, 12:38 AM	#7
smmmurf Colonel 370 Rep 2,197 Posts Drives: E92 M3 DCT 357k+ miles Join Date: Feb 2008 Location: Stanford, CA iTrader: (7)	I don't really think it's going to make a huge difference to anything if I just stick with stock sizes. What's the effect on rolling diameter if I stick to 245 and stretch it .5" more on a 9" rim instead of 8.5"? 1%? 0.1%?
	Appreciate 0 Quote

04-07-2011, 06:59 AM	#8
pbonsalb Lieutenant General 5607 Rep 11,062 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	You can find tire size calculators on the internet very easily. 245/40 matches up well to 265/35 and 265/40 matches up well to 285/35. If you can't get those sizes in the tire you want, consider another tire or another size. Tires are recommended for certain widths. A 245/40/18 is measured on an 8.5 width wheel and is recommended for 8.0 to 9.5. If you run it on wider than measured spec, you gain 0.2 treadwith for each 0.5 inch added wheel width. Of course you also lose some sidewall flex and thus ride quality, but there is always a tradeoff and you can begin to see how the car makers compromised in choosing the factory sizes. I have a set of the ARC8s coming in 18 x 9.5/10.5 and will probably reuse my nearly new PS2s in 245/40 and 265/40. They will be at the end of the recommended wheel width, but turn in should be improved and I am not convinced ride quality will be any worse than going down to a 35 series sidewall for a wider tire. My ideal choice was 265/35 and 285/35 but I could not sell my near new PS2s locally. Maybe I will change sizes for the next set.
	Appreciate 0 Quote

04-07-2011, 10:07 AM	#12
smmmurf Colonel 370 Rep 2,197 Posts Drives: E92 M3 DCT 357k+ miles Join Date: Feb 2008 Location: Stanford, CA iTrader: (7)	That looks pretty good. They still don't make a 275/40R18 though. I fear it would look fat on my car because I'm at stock height with no intentions of changing suspension whereas you're on Dinan springs I believe... Additionally, 275/40R18 would definitely not fit on my E46 M3 which I want to be able to put the wheels on as well.
	Appreciate 0 Quote

04-07-2011, 02:36 PM	#13
AMPowerJ One mod leads to another ... 422 Rep 2,900 Posts Drives: 2014 F10 M5 Join Date: Apr 2008 Location: Blythewood, SC iTrader: (10)	Sorry. I completely missed the fact you were talking about 18" and not 19" RACs. __________________ Current: 2014 F10 M5 Previous: 2015 F80 M3, 2013 E92 M3, 2013 F10 M5, 2009 E90 M3, 1998 E36 M3
	Appreciate 0 Quote

05-01-2011, 10:19 AM	#14
Eugene-TAIWAN Brigadier General 254 Rep 3,157 Posts Drives: E92 M3 Coupe Join Date: Jun 2009 Location: Taiwan iTrader: (4)	if anything helps! I"m going with 265/35/18 on the front and 295/35/18 on the rear. I think this set up to me would be the best for daily and track + some mexico run __________________ Past: Gintani stage3 M3, Cayman GTS present: Porsche 993RWB, 964RS America,996 cupcar, 964 turbo 3.6,Macan Turbo,997GT2,930 turbo,i3, MINI JCW
	Appreciate 0 Quote

05-01-2011, 10:27 AM	#15
STALKER Brigadier General 170 Rep 3,848 Posts Drives: 997.2 GT3, Golf R Join Date: Feb 2009 Location: Toronto, ON iTrader: (5)	I run PSS 255/35 275/35 on my 19" RACs. They run a bit more square then the PS2s, but not clearance issues at all. __________________
	Appreciate 0 Quote

05-01-2011, 08:13 PM	#17
smmmurf Colonel 370 Rep 2,197 Posts Drives: E92 M3 DCT 357k+ miles Join Date: Feb 2008 Location: Stanford, CA iTrader: (7)	I went from 245/265 PS2's to 245/265 PSS's and I can say undoubtedly that they grip better, ride better, are quieter, and respond quicker. 18" OEM to 18" RAC.
	Appreciate 0 Quote

05-02-2011, 08:19 PM	#19
Radiation Joe Veni Vidi Vici 89 Rep 2,750 Posts Drives: '11 JB/BBe-6sp-e90 Join Date: Jul 2008 Location: Macungie PA iTrader: (0) Garage List 2011 e90 M3-Sold [8.50] 2003 RS6 - Sold [0.00] 2009 e90 M3 - Gone [0.00] 2003 M3 SOLD [0.00] old 2002 [10.00]	There is a huge discussion of tire options for the 18 inch RG63s here: http://www.m3forum.net/m3forum/showthread.php?t=327012 (pics) and here http://www.m3forum.net/m3forum/showt...ight=inch+RG63 (group buy discussion) These are e46 fitment discussions for the most part. __________________ Dinan compliment of stuff plus PF rotors and RG63s. Enough for now. Why, yes. I am an abrasive bastard.
	Appreciate 0 Quote