Tire Combo Question

Kev · 03-08-2009, 08:58 PM

We know that the speedometer of the M3 reads about 3-5% higher than the actual speed. I am getting a set of new wheels in the following size:

Front: 19X9.5 ET22
Rear: 19X10.5 ET25

What would be the appropriate tire sizes for these rims? I'm thinking of the following combination:

1. Front: 255/35R19, Rear: 275/35R19

I'm running 255/35R19 up front for my winter setup so I know the 255 will clear my AC Schnitzer springs with stock EDC struts. This will be about 1.1% larger than stock diameter in the back.

2. Front: 265/35R19, Rear: 285/35R19

This will give me a beefier look. I am not sure if the 265/35 up front will cause any rubbing. Also, I'm not sure if the rear will rub due to the offset. This will be about 2.2% larger in diameter than stock.

Both setup retains the factory front and rear size difference of about 0.6" diameter front and back.

Which one do you think will work better for the rim width?

FrankieP · 03-08-2009, 09:24 PM

I think 255/35 front with 285/30 rear, depending on the tire brand you are using.

Radiation Joe · 03-08-2009, 10:25 PM

Your second choice of 265/285 is a good choice for 9.5/10.5 wheels. This is what I ran on the track with my e46 and what I intend to run on the track with the e90.

Kev · 03-08-2009, 11:48 PM

Quote:

Originally Posted by Radiation Joe

Your second choice of 265/285 is a good choice for 9.5/10.5 wheels. This is what I ran on the track with my e46 and what I intend to run on the track with the e90.

That's what I think too. I'll just have to find a brand that offers XL for the 285/35.

modbargains · 03-09-2009, 01:40 PM

Quote:

Originally Posted by Frank@CEC

I think 255/35 front with 285/30 rear, depending on the tire brand you are using.

I agree with this also, there is also another member here on the boards running a 295/30/19 Rear, on his 10.5 TEs.

Kev · 03-09-2009, 03:32 PM

Quote:

Originally Posted by Frank@CEC

I think 255/35 front with 285/30 rear, depending on the tire brand you are using.

Quote:

Originally Posted by **********s

I agree with this also, there is also another member here on the boards running a 295/30/19 Rear, on his 10.5 TEs.

The problem is I don't want to run an overall diameter that is smaller than the stock rear tires. The 295/30R19 will be 0.3" smaller in diameter than the 265/35R19 PS2, making the speedometer even more inaccurate. That's why I want to do 275/35 or 285/35 instead.

MrHarris · 03-10-2009, 03:12 AM

255/35 front, 285/30 rear is what I did and it feels more balanced than stock. I run 9" in the front 10" in the rear. If I were you, I'd go 265/30 front, 295/30 rear.

03-08-2009, 08:58 PM	#1
Kev Critical Care Anesthesiologist 481 Rep 8,828 Posts Drives: SMB F83 Join Date: Aug 2006 Location: Seattle, WA iTrader: (24) Garage List 2009 Porsche 911 Ca ... [9.50]	Tire Combo Question We know that the speedometer of the M3 reads about 3-5% higher than the actual speed. I am getting a set of new wheels in the following size: Front: 19X9.5 ET22 Rear: 19X10.5 ET25 What would be the appropriate tire sizes for these rims? I'm thinking of the following combination: 1. Front: 255/35R19, Rear: 275/35R19 I'm running 255/35R19 up front for my winter setup so I know the 255 will clear my AC Schnitzer springs with stock EDC struts. This will be about 1.1% larger than stock diameter in the back. 2. Front: 265/35R19, Rear: 285/35R19 This will give me a beefier look. I am not sure if the 265/35 up front will cause any rubbing. Also, I'm not sure if the rear will rub due to the offset. This will be about 2.2% larger in diameter than stock. Both setup retains the factory front and rear size difference of about 0.6" diameter front and back. Which one do you think will work better for the rim width? __________________ kev { divinum est sedate dolorem } "your friendly neighborhood critical care anesthesiologist"
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03-08-2009, 09:24 PM	#2
FrankieP 47 Rep 410 Posts Drives: E92 M3 AW/BLK Join Date: Oct 2008 Location: Miami, FL iTrader: (0)	I think 255/35 front with 285/30 rear, depending on the tire brand you are using. Last edited by FrankieP; 03-08-2009 at 09:30 PM.. Reason: add tire size
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03-08-2009, 10:25 PM	#3
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]	Your second choice of 265/285 is a good choice for 9.5/10.5 wheels. This is what I ran on the track with my e46 and what I intend to run on the track with the e90.
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03-10-2009, 03:12 AM	#7
MrHarris yodog 197 Rep 5,026 Posts Drives: '86 Corolla Join Date: Jun 2007 Location: Diamond Bar, Ca iTrader: (5) Garage List 2009 BMW [10.00]	255/35 front, 285/30 rear is what I did and it feels more balanced than stock. I run 9" in the front 10" in the rear. If I were you, I'd go 265/30 front, 295/30 rear. __________________ 2009 E92 M3 \| Alpine White \| Black Extended \| Advan RS \| Turner Test Pipes \| Dinan Axle-Back \| OETuning \| Eibach Springs \| UUC SSK \| VRS Front Lip \| VRS Type I Diffuser \| Matte Black \| RPi Scoops \| MS Filter \| Yokohama AD08 \| F1 Pinnacle Special Thanks: Gintani \| OETuning \| eAs
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