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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Nov-03-2011, 08:02:55 AM   #131
lsbm3phil
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Default Re: e46 M3 Tire Sizing Thread

cool thread
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Old Fri, Nov-04-2011, 01:17:56 PM   #132
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Default Re: e46 M3 Tire Sizing Thread

Quote:
Originally Posted by mousemaster View Post
Thank you again. If I follow your suggestions, the PSC is, regrettably, limited in sizes:
18"


/snip

Maintaining some stagger for the big tracks might reinstate some of the high speed stability I am missing with the square set up now. My rear bushings were done several years ago but could be worn and in need of replacement. I will check on them. I heard the hard bushings from Turners make a bit of noise so I may stay with the factory bushings.

My question is will the factory comp wheels work with a staggered 245/40 (?) and a 265-275/35 ? What wheels would you recommend that resemble the comp wheels along with the offset?

We could take this off line if you care to. I would enjoy the conversation.
Thank you.
BMWCCA
I suspect, if you're stability issues are this severe, that they're not because of the tire sizes. Large front tires is the go to track setup for e46 m3s, and most people never have any stability issues with it. I'd get the alignment, RTABs, and subframe checked out, and maybe have them look over the rest of the ball joints/bushings, and then go from there (before buying tires to try to address it).
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Old Sun, Dec-18-2011, 07:39:52 PM   #133
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Default Re: e46 M3 Tire Sizing Thread

I have a 2002 m3 that is completely stock with 18" wheels. From this forum I get the front as 8" wide and rears 9" wide.
What are the offsets for these wheels?

I am looking at a couple of larger tire sizes and want to know if anyone has successfully used any of them without rubbing issues.

Front:
235/45-18
245/40-18 will the section width rub on the strut?
245/45-18 will the section width rub on the strut and/or diameter on the spring perch?

Rear: Any unusual wear patterns on the 9" wide wheel?
265/40-18
275/40-18 will section rub on the fender?
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Old Sun, Dec-18-2011, 09:22:45 PM   #134
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Default Re: e46 M3 Tire Sizing Thread

Quote:
Originally Posted by JerryRigged View Post
I have a 2002 m3 that is completely stock with 18" wheels. From this forum I get the front as 8" wide and rears 9" wide.
What are the offsets for these wheels?

I am looking at a couple of larger tire sizes and want to know if anyone has successfully used any of them without rubbing issues.

Front:
235/45-18
245/40-18 will the section width rub on the strut?
245/45-18 will the section width rub on the strut and/or diameter on the spring perch?

Rear: Any unusual wear patterns on the 9" wide wheel?
265/40-18
275/40-18 will section rub on the fender?

Front: 18 x 8 ET47
Rear: 18 x 9 ET26

Front:
235/45 - too tall.
245/40 - fits fine, no conflict with strut.
245/45 - too tall.

Rear:
265/40 - too tall. Use 265/35.
275/40 - too tall. Use 275/35.
No fender rub with 265/35 or 275/35 unless your way dropped and have big spacers.
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Old Sun, Dec-18-2011, 09:43:57 PM   #135
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Default Re: e46 M3 Tire Sizing Thread

Guys,

I recently got some CHs and it came with some tires in the front being

235/35/19 - Front (Bridgestone)

Because the backs were worn out I put on 285/30/19 (hankook)

this size combo had worked with no issues on my friends 03 but on my 02 the dsc goes nuts around any turns at 40 mph+ speeds.

to correct the issue im thinking of changing the fronts to 245/35/19s (hankook)

does this sound right to you guys? Im hoping making the tire manufacturers the same and changing the size should correct the issue.

I hear there are slight variations between tire manufacturers in sizing.
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Old Sun, Dec-18-2011, 10:27:14 PM   #136
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Default Re: e46 M3 Tire Sizing Thread

Quote:
Originally Posted by kwikieman146 View Post
Guys,

I recently got some CHs and it came with some tires in the front being

235/35/19 - Front (Bridgestone)

Because the backs were worn out I put on 285/30/19 (hankook)

this size combo had worked with no issues on my friends 03 but on my 02 the dsc goes nuts around any turns at 40 mph+ speeds.

to correct the issue im thinking of changing the fronts to 245/35/19s (hankook)

does this sound right to you guys? Im hoping making the tire manufacturers the same and changing the size should correct the issue.

I hear there are slight variations between tire manufacturers in sizing.
I'm running this exact setup of Hankook 245/35 R19 and 285/30 R19 on my RE30's 9-inch wide fronts and 10-inch rears and have had zero issues. Changing the fronts to 245/35 will more closely match tire diameters and circumference values.

245/35: diameter 25.8, circumference: 80.9
285/30: diameter 25.7, circumference: 80.8

The above combo should helps so as to reduce/avoid the chances of unwanted DSC intervention.
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Old Mon, Dec-19-2011, 10:45:01 PM   #137
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Default Re: e46 M3 Tire Sizing Thread

Quote:
Originally Posted by normcaldwell View Post
Front: 18 x 8 ET47
Rear: 18 x 9 ET26

Front:
235/45 - too tall.
245/40 - fits fine, no conflict with strut.
245/45 - too tall.

Rear:
265/40 - too tall. Use 265/35.
275/40 - too tall. Use 275/35.
No fender rub with 265/35 or 275/35 unless your way dropped and have big spacers.
When you say "too tall" is that an opinion or will there be mechanical interference?

Last edited by JerryRigged; Mon, Dec-19-2011 at 10:56:48 PM.
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Old Tue, Dec-20-2011, 12:36:30 AM   #138
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Default Re: e46 M3 Tire Sizing Thread

Quote:
Originally Posted by kwikieman146 View Post
Guys,

I recently got some CHs and it came with some tires in the front being

235/35/19 - Front (Bridgestone)

Because the backs were worn out I put on 285/30/19 (hankook)

this size combo had worked with no issues on my friends 03 but on my 02 the dsc goes nuts around any turns at 40 mph+ speeds.

to correct the issue im thinking of changing the fronts to 245/35/19s (hankook)

does this sound right to you guys? Im hoping making the tire manufacturers the same and changing the size should correct the issue.

I hear there are slight variations between tire manufacturers in sizing.
Currently running 235/35-19 Fronts (25.5" dia) and 285/30-19 Rear (25.8" dia) Hankook V12s on OEM 19s with stock suspension and no problems. Maybe an issue running different brands of tires together.
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Old Tue, Dec-20-2011, 06:45:01 AM   #139
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Default Re: e46 M3 Tire Sizing Thread

Quote:
Originally Posted by JerryRigged View Post
When you say "too tall" is that an opinion or will there be mechanical interference?
Opinion.
I would not be interested in putting tires on the car that are taller than stock.
I think it negatively affects the responsiveness and overall feel of the car; plus I think it looks like crap.

If you're on stock springs, you could probably fit 27" tires if you want.
If your on shorter springs, not so much.


Tire Size Calculator: http://www.1010tires.com/TireSizeCalculator.asp

Stock 225/45/18: 25.97"
235/45/18: 26.32"
245/40/18: 25.97"
245/45/18: 26.68"
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Old Thu, Dec-22-2011, 05:10:06 PM   #140
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Default Re: e46 M3 Tire Sizing Thread

So, to run 18x9 inch Oem rear wheels, square, on stock suspension, what is the recommended tire size? 255/40 square? Or can 265/35 fit?
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Discussing e46 M3 Tire Sizing Thread in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)