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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 Mon, Jan-02-2012, 08:21:04 AM   #1
Captai
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Default Thoughts on the CSL tire size

I'm thinking of putting 245 in the front and 265 in the rear of the 19inch 8.5 and 9.5 CSL rims. Anybody have any input on these tire sizes?
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Old Mon, Jan-02-2012, 02:27:24 PM   #2
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Default Re: Thoughts on the CSL tire size

I'm running same up front but 275's in the rear.
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Old Mon, Jan-02-2012, 03:34:28 PM   #3
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Default Re: Thoughts on the CSL tire size

i run a 265 in the rear and i like it more than the 275 i had before. it felt like too much tire with the 275's on a 9.5. i also switched to 235 in the front and i like it much more than the 245 also. i think next time around i may even try 255's in the rear. there is such a thing as having too much tire and imo 275's are a lot on this car.
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Old Mon, Jan-02-2012, 05:51:50 PM   #4
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Default Re: Thoughts on the CSL tire size

The closer the tire width is from front to rear, the less the car will understeer. The factory stagger is 30mm. Taking 10 mm away from that difference will help some.

The car does not lack for rear traction, even with the traction control off. If you are a street driver only, this issue doesn't matter that much since the car is great on the street. If you wish to drive on the track the stagger becomes a bit of a handicap, hence the need to reduce the stagger.
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Old Mon, Jan-02-2012, 05:55:57 PM   #5
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Default Re: Thoughts on the CSL tire size

The problem with the 265/30/19 is that it's way too short for street use in my opinion (as is the 275/30). I mean really short, as in almost no sidewall at all.

With those wheel sizes I'd do either 225/255 or 245/255.
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Old Mon, Jan-02-2012, 06:56:17 PM   #6
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Default Re: Thoughts on the CSL tire size

The CSL tire size is 235/35/19 front and 265/30/19 rear. I run this setup with my 19" street wheels and love it. The wheels are 19x8.5 front and 19x10 rear. This setup handles great and feels "crisper" than the 245/35/19 front and 275/30/19 rear that I previously ran. I feel that this is a great balance for all around performance. A wider rear tire really isn't needed unless traction in a straight line is a problem, ie you have forced induction
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Old Mon, Jan-02-2012, 08:20:30 PM   #7
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Default Re: Thoughts on the CSL tire size

alright thanks for the input guys! happy new year!
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Old Mon, Jan-02-2012, 10:11:26 PM   #8
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Default Re: Thoughts on the CSL tire size

Sry I live in socal... Too many P cars around, we need the width in the rear so that we stand out a bit
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Old Mon, Jan-02-2012, 10:36:32 PM   #9
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Default Re: Thoughts on the CSL tire size

What about 235 in the front and 265 in the rear on OEM ZCP wheels, with a 5mm spacer in the front? Wouldn't that bring the front spacing closer to a CSL spec'd car? Don't they have a wider front track than a non-CSL?
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Old Tue, Jan-03-2012, 12:06:13 AM   #10
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Default Re: Thoughts on the CSL tire size

OP, the 245/265 should offer a nice balance. Have you checked the difference in diameters with OEM? Not so sure if increasing the error of the speedometer is an issue for you. At any rate, 245/265 is the same set-up for the 1M and e9x M3, so give it a try in your e46. I ran 235/35 and 265/30 on oem 19's and aside from the VERY little sidewall support, I enjoyed the upgrade tire size.
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Discussing Thoughts on the CSL tire size 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)