E-Class (W212) 2010 - 2016: E 350, E 550
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Old Jul 2, 2014 | 09:18 AM
  #26  
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2013 E350 Sport Wagon - 4Matic
Originally Posted by threeMBs
The following combos will work on W212 E350 and E550 4matics:

18" - 245/40-18 & 285/35-18 (100% same rolling diameter of 25.8"), 245/40-18 & 275/35-18 and 255/40-18 & 285/35-18 will also work as the difference is well withing factory build-in 3% front/rear tolerance. (sport stock 245/40-18 and 265/35-18 will not be a good combination).

19" - 245/35-19 & 285/30-19 (100% same rolling diameter of 25.8"), 245/35-19 & 275/30-19 and 255/35-19 & 285/30-19 (just like E63 W4) will also work as the difference is well withing 3% front/rear tolerance.

.40 X 245 = 98 mm and .35 X 285 = 99.75

.35 X 245 = 85.75 mm and .30 X 285 = 85.5 mm

I know they're very close and well within the 3% tolerance but is it really considered 100% the same rolling diameter? Am I missing something?
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Old Jul 2, 2014 | 09:18 AM
  #27  
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Originally Posted by Pristine
My question was related ride difference between 30 vs 35 profile tires that threeMB pointed out. Not related to staggered/non. In fact, I'm partial to going either way since it doesn't really matter on our cars.

If sized properly, 30 profile tire is the same as the 35. You need to understand how tire sizing works. Let's look at an example.

245/35/19 has a width of 245mm. The height is 35% of the width and it fits a 19 inch wheel. The tire has a rolling diameter of 25.75 inches. Accordingly, the sidewall is (25.75 - 19)/2 or about 3.375 inches.

The 285/30/19 has a rolling diameter of 25.73 inches giving you a sidewall of about 3.365 inches - about the closest you can get in that width.

The profile is always a percentage of the width and that number - by itself - means nothing.



Because it snows around here in winter and I often drive up and down NE where it also snows. 4Matic is must for this reason.
Right. And that is the exact reason why staggered AWD (if not designed for it) is bad. Those are the exact situations where you'll want all of the proper handling characteristics that were designed into the car - along with the proper winter tires.

For winter handling, you'll want the narrowest tires that are the most compliant - so the smallest wheel size with the narrowest tire. For these cars, a 205/55/17 is close to ideal with a outside diameter of 25.88. Technically a 185/60/17 (25.74) would be ideal that that starts looking a bit funky.


Last edited by CEB; Jul 2, 2014 at 09:35 AM.
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Old Jul 2, 2014 | 09:28 AM
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2013 E350 Sport Wagon - 4Matic
Originally Posted by KEY08
You're the one that brought up the subject of staggered wheels right from the get go. jeez....
Yes, you are indeed correct. I brought up staggered versus non-staggered as I wasn't clear at the time if the potential risk was the actual "widths" being different between the front and rear set-up or if the different widths subsequently making the "overall diameter" different due to wider tires and different sidewall height was the actual concern.

Based on the feedback, it seems the safest way would be to go with a non-staggered set-up (for both handling and to eliminate the diff from frying). Also, seems it may be wise to go with an overall rolling diameter that is very close stock (not sure if this is true or not...but for some reason it would make be sleep better as it would introduce the least amount of variables).

That being said, would it be appropriate to purchase 4 front wheels from the 14 E63 AMG Wagon pictured above for a E350 4Matic?
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Old Jul 2, 2014 | 10:07 AM
  #29  
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You don't have to go staggered, but it's an option. Like most said, it's for looks. You can definitely purchase staggered wheels/tires with same stock rolling radius, and be within 3% front and rear. Obv your mind is set and staggered on a 4matic scares you, thats fine.. Soo
to answer your question, YES you can use 19" AMG wheels on your car 255/35 front and back, very close to your stock rolling diameter. I believe you currently have 245/40, correct me if i'm wrong. Only thing I cant guarantee is if the offset works, or would look good.. bc I don't know the offsets and don't feel like looking it up. good luck
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Old Jul 2, 2014 | 10:11 AM
  #30  
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2014 E350 4Matic
Originally Posted by CEB
If sized properly, 30 profile tire is the same as the 35. You need to understand how tire sizing works. Let's look at an example.

245/35/19 has a width of 245mm. The height is 35% of the width and it fits a 19 inch wheel. The tire has a rolling diameter of 25.75 inches. Accordingly, the sidewall is (25.75 - 19)/2 or about 3.375 inches.

The 285/30/19 has a rolling diameter of 25.73 inches giving you a sidewall of about 3.365 inches - about the closest you can get in that width.

The profile is always a percentage of the width and that number - by itself - means nothing.
I did not know this. Very informative.
Thanks!
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Old Jul 2, 2014 | 10:17 AM
  #31  
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1953 300 Adenauer, 1971 300 SEL 6.3, 1975 600, 1978 450 6.9
Originally Posted by shashivr4
Yes, you are indeed correct. I brought up staggered versus non-staggered as I wasn't clear at the time if the potential risk was the actual "widths" being different between the front and rear set-up or if the different widths subsequently making the "overall diameter" different due to wider tires and different sidewall height was the actual concern.

Based on the feedback, it seems the safest way would be to go with a non-staggered set-up (for both handling and to eliminate the diff from frying). Also, seems it may be wise to go with an overall rolling diameter that is very close stock (not sure if this is true or not...but for some reason it would make be sleep better as it would introduce the least amount of variables).

That being said, would it be appropriate to purchase 4 front wheels from the 14 E63 AMG Wagon pictured above for a E350 4Matic?
Hard to say. Do you know the offset of the wheel?

There is another reason for staying close to the OE diameter. Changing the diameter affects not only the speedometer but also the odometer. If the difference is significant, there is a distinct possibility that the manufacturer will determine that there is no way of correctly establishing the actual mileage of your car. That is one of the few ways of actually voiding the entire warranty and your car may have to be re-titled as such.

While many will say "its only 5% (or whatever), let them stop my warranty at 47500 miles", legally any intentional discrepancy is sufficient to void the entire warranty.

It is not very common and nothing that most people need to worry about but there are numerous instances where warranties have been voided for this. Interestingly enough, it is immaterial if the mileage is over or under stated - if the actual mileage cannot be established then the warranty could be toast.

The general rule of thumb is that one should stay within 1% of the OE outside diameter. Mechanical issues with 4matic can crop up beyond 3%.

You should also consider tire wear. A new tire has about 10/32nds tread and is considered worn at 4/32nds and unusable at 2/32nds. That gives you about 6/32nds of wear - or about .1875 of an inch. That amount is generally what manufacturers figure into the allowable variance and that should be your guide when picking a proper tire size
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Old Jul 2, 2014 | 10:25 AM
  #32  
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1953 300 Adenauer, 1971 300 SEL 6.3, 1975 600, 1978 450 6.9
Originally Posted by Pristine
I did not know this. Very informative.
Thanks!
For years I was always confused about this too. There is this mixture of inches and metric (wheel sizing is one of the few things done worldwide in inches - I can't think of anything else except wheels that are measured in inches (Zoll) in Germany.

There is one time when the aspect ratio may be an important number by itself - and that is when tire stores have different prices for "low profile" tires.

Anything under 55 is considered "low profile". That is important only because as the sidewall gets shorter it gets stiffer making it more difficult to mount tires without using specialized equipment and there is a greater likelihood of wheel damage.
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Old Jul 2, 2014 | 11:06 AM
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Old Jul 2, 2014 | 02:02 PM
  #34  
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1953 300 Adenauer, 1971 300 SEL 6.3, 1975 600, 1978 450 6.9
Originally Posted by bigigg
See what you've done now? You've gone and run everybody off.
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Old Jul 2, 2014 | 03:10 PM
  #35  
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Lolol
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Old Jul 2, 2014 | 09:09 PM
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I have two sets of HRE's in 18 that I used on my 2011 E class 4M .........for sale


I know OP mentioned 19's though, thanx
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Old Jul 2, 2014 | 10:34 PM
  #37  
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2014 E350 w/ every option :)
That being said, would it be appropriate to purchase 4 front wheels from the 14 E63 AMG Wagon pictured above for a E350 4Matic?

Those will run you $8000++ on rims alone. I think they are forged !
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Old Jul 3, 2014 | 03:36 AM
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Originally Posted by E350rulz
That being said, would it be appropriate to purchase 4 front wheels from the 14 E63 AMG Wagon pictured above for a E350 4Matic?

Those will run you $8000++ on rims alone. I think they are forged !
Those rims pictured aren't forged. The forged AMG rims are the twin 5 spoke silver wheels.

Of course it would be most advantageous for the OP to purchase the wheels second hand.
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Old Jul 3, 2014 | 11:43 AM
  #39  
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2013 E350 Sport Wagon - 4Matic
Originally Posted by hyperion667
I have two sets of HRE's in 18 that I used on my 2011 E class 4M .........for sale


I know OP mentioned 19's though, thanx
Yeah, would prefer 19s but could you posts some pics of the HREs you're selling?
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Old Jul 3, 2014 | 12:43 PM
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Originally Posted by shashivr4
Yeah, would prefer 19s but could you posts some pics of the HREs you're selling?

don't have any readily available.......but I have a set of P43- tint brush clear and another set that is gloss black; R43.....
both 18's, ran 245/40's
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