Widest tires possible on stock 18's?

varun · 09-21-2008, 06:05 PM

This may have been covered before but I searched a whole bunch and did not find the info I need.

On stock 18's on the E90 M3, I know the fronts are 18x8.5 and rears are 18x9.5.

Will I be able to safely squeeze a 285/30/18 in the REAR and a 245/35/18 in the FRONT on these stock wheels?

Thanks!

MMMazing07 · 09-21-2008, 07:37 PM

no 285s should go on at least a 10 inch wide wheel. 275 is the MAX you could go on a 9.5 inch wheel. you can put 245s on the front though.

Radiation Joe · 09-22-2008, 07:36 AM

Different tire brands have different dimensions as well. If your particular brand runs big, your 285s definitely won't fit.

BRDHNTR · 09-22-2008, 09:53 AM

Quote:

Originally Posted by MMMazing07

no 285s should go on at least a 10 inch wide wheel. 275 is the MAX you could go on a 9.5 inch wheel. you can put 245s on the front though.

FYI, the car comes with 245's up front.

mightyaa · 09-22-2008, 11:52 AM

Quote:

Originally Posted by Radiation Joe

Different tire brands have different dimensions as well. If your particular brand runs big, your 285s definitely won't fit.

Depends on brand. I was looking at it from a Autocross perspective where you have to use stock sized wheels or get classed even worse than SS (Z06 & Elise territory).

Hoosier A6's do have a 295/30r18 that fits a 9.5"-11" wheel. Unfortunately, they don't have anything wider from the front than stock where I think I'd benefit more from a wider tire... I've been wondering if you could shoehorn a 275/35/18 onto the front since it fits a 9-11" wheel and I've known guys to slap wider tires onto smaller wheels before, but I'm not the type to spend that kind of money on "what if's"... and figure out offsets to avoid rubbing unpleasantries.

varun · 09-22-2008, 11:55 AM

Yes its a tricky one.

The tire im referring to is a hoosier 285/30/18 for the rear, trying to squeeze that on the 9.5 inch wheel... think its a risk?

MMMazing07 · 09-22-2008, 12:54 PM

i put 245s on a 8 inch wheel and 275 on a 9 inch wheel and it was a big mistake. car feels like marshmallows. stick with the proper sizes or bump it up to a 275. the 285 would fit and handling would be better in long sweeps but the in tight corners it would be bouncy and vague.

kmarei · 11-22-2008, 09:24 PM

how about 255/35 front and 275/35 rear?

2m3 · 11-23-2008, 03:40 PM

Current model M5 and M6 has 255 tires on 8.5 front, and 285 on 9.5 rear.

pittsy · 11-23-2008, 06:41 PM

Quote:

Originally Posted by 2m3

Current model M5 and M6 has 255 tires on 8.5 front, and 285 on 9.5 rear.

255/40 in the front
285/35 in the back

09-21-2008, 06:05 PM	#1
varun Private First Class 27 Rep 159 Posts Drives: '14 550i M-sport Join Date: Aug 2005 Location: Austin, TX iTrader: (1)	Widest tires possible on stock 18's? This may have been covered before but I searched a whole bunch and did not find the info I need. On stock 18's on the E90 M3, I know the fronts are 18x8.5 and rears are 18x9.5. Will I be able to safely squeeze a 285/30/18 in the REAR and a 245/35/18 in the FRONT on these stock wheels? Thanks!
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09-21-2008, 07:37 PM	#2
MMMazing07 More than you can afford pal....ferrari 181 Rep 1,471 Posts Drives: Z4M Join Date: Aug 2007 Location: MD iTrader: (0)	no 285s should go on at least a 10 inch wide wheel. 275 is the MAX you could go on a 9.5 inch wheel. you can put 245s on the front though.
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09-22-2008, 07:36 AM	#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]	Different tire brands have different dimensions as well. If your particular brand runs big, your 285s definitely won't fit.
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09-22-2008, 11:55 AM	#6
varun Private First Class 27 Rep 159 Posts Drives: '14 550i M-sport Join Date: Aug 2005 Location: Austin, TX iTrader: (1)	Yes its a tricky one. The tire im referring to is a hoosier 285/30/18 for the rear, trying to squeeze that on the 9.5 inch wheel... think its a risk?
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09-22-2008, 12:54 PM	#7
MMMazing07 More than you can afford pal....ferrari 181 Rep 1,471 Posts Drives: Z4M Join Date: Aug 2007 Location: MD iTrader: (0)	i put 245s on a 8 inch wheel and 275 on a 9 inch wheel and it was a big mistake. car feels like marshmallows. stick with the proper sizes or bump it up to a 275. the 285 would fit and handling would be better in long sweeps but the in tight corners it would be bouncy and vague.
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11-22-2008, 09:24 PM	#8
kmarei Major General 687 Rep 6,845 Posts Drives: 2018 Audi RS5 coupe Join Date: Jul 2008 Location: Reston, VA iTrader: (34) Garage List 2018 Audi RS5 [0.00]	how about 255/35 front and 275/35 rear?
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11-23-2008, 03:40 PM	#9
2m3 Private First Class 11 Rep 146 Posts Drives: 1995 M3, 1988 M3 Join Date: Apr 2006 Location: HIllside VIllage, ca 90032 iTrader: (1)	Current model M5 and M6 has 255 tires on 8.5 front, and 285 on 9.5 rear.
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