18's 19's or both? Advice, Opinions

fatgrandma · 08-05-2012, 09:14 AM

Quote:

Originally Posted by badmude

I'd think it would mess with the DTC traction control. Front and rear speed sensors going 2 different speeds. unless you accurately match tire roll diameter.

This. Everything with aprox. 2% more or less tire diameter would cause problems with DTC and ABS. I would go with 4x18" or 4x19" depending on the condition of the roads where you drive.

shrink · 08-05-2012, 09:32 AM

the E39 M5 used to come with an option that had 19's on rear and 18's on front. That looked just fine and i'm sure handled perfectly well.

As long as your total radius of wheels with tyres are the same, I can't imagine there would be any real difference in the way the car drove, as you're not altering the size of the rear rolling radius.

Dark_Knight_335 · 08-05-2012, 09:33 AM

Get 19s all around with wider tires in back- that would be a staggered setup as I see it.
If you want to dick around with stance, get some perches.

bmw325i · 08-06-2012, 12:02 AM

It would actually work with a 245/35/18 and 285/30/19 the sidewall heights are the same front and back and the tire sizes are close enough that you would have no problems. Personally I think your better off with the same size front and back but it can be done.

08-05-2012, 09:32 AM	#24
shrink Captain 19 Rep 752 Posts Drives: E90 325i SE Join Date: Jun 2012 Location: Edinburgh (UK) iTrader: (2)	the E39 M5 used to come with an option that had 19's on rear and 18's on front. That looked just fine and i'm sure handled perfectly well. As long as your total radius of wheels with tyres are the same, I can't imagine there would be any real difference in the way the car drove, as you're not altering the size of the rear rolling radius.
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08-05-2012, 09:33 AM	#25
Dark_Knight_335 Came to the N55 Darkside 1115 Rep 12,740 Posts Drives: 2011 335 E93 M-Sport Join Date: May 2010 Location: NY/NJ iTrader: (28)	Get 19s all around with wider tires in back- that would be a staggered setup as I see it. If you want to dick around with stance, get some perches.
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08-06-2012, 12:02 AM	#26
bmw325i Major General 223 Rep 5,120 Posts Drives: 2006 BMW 325i Join Date: Oct 2010 Location: United States iTrader: (8)	It would actually work with a 245/35/18 and 285/30/19 the sidewall heights are the same front and back and the tire sizes are close enough that you would have no problems. Personally I think your better off with the same size front and back but it can be done.
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