What's an acceptable Front:Rear % difference in diameter
Super Member
Joined: Jun 2014
Posts: 568
Likes: 20
From: Silver Spring, MD
'18 Audi A4
Yes, the closest you can get to overall diameter is best. with today's sensors that 2% or less is good IMO. Going significantly heavier though while keeping same rotational mass may not be good. I believe the stock wheels are cast plus run flats, these wheel/tire combos are probably 50+ lbs at each corner easy.
would really try to stay under 1% difference front and rear and less than 2.5% over stock (3% is usually advisable as fine but i have seen that the fenders are tight on the front axle on the front splash guards)
Member
Joined: Jul 2018
Posts: 108
Likes: 40
From: Deep South, Taiwan
Tuned '18 C43 coupe & Stock '18 GLE43 coupe
For your reference, the 18" wheels came with 225/45/18's front and 245/40/18's rear. That's a -1.2% circum difference.
19" wheels came with 225/40 & 255/35 and that's a -0.4% difference.
Seems factory went with slightly taller tires in the front. Just a coincident or design requirement? dunno...
I went with 225/40/19 & 265/35/19 and that a +0.8%.
So far, only only around 2000km, no issues.
19" wheels came with 225/40 & 255/35 and that's a -0.4% difference.
Seems factory went with slightly taller tires in the front. Just a coincident or design requirement? dunno...
I went with 225/40/19 & 265/35/19 and that a +0.8%.
So far, only only around 2000km, no issues.
Super Member
Joined: Jun 2014
Posts: 568
Likes: 20
From: Silver Spring, MD
'18 Audi A4
For your reference, the 18" wheels came with 225/45/18's front and 245/40/18's rear. That's a -1.2% circum difference.
19" wheels came with 225/40 & 255/35 and that's a -0.4% difference.
Seems factory went with slightly taller tires in the front. Just a coincident or design requirement? dunno...
I went with 225/40/19 & 265/35/19 and that a +0.8%.
So far, only only around 2000km, no issues.
19" wheels came with 225/40 & 255/35 and that's a -0.4% difference.
Seems factory went with slightly taller tires in the front. Just a coincident or design requirement? dunno...
I went with 225/40/19 & 265/35/19 and that a +0.8%.
So far, only only around 2000km, no issues.
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Thread Starter
MBWorld Fanatic!
Joined: Jun 2019
Posts: 1,013
Likes: 194
C190
Yes I have been hoping that it will work out that way. Let’s see. Still hunting for something suitable. What’s the narrowest practical rim width for a 275?
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