Tires - Mercedes-Benz Forum

 
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post #1 of 7 (permalink) Old 06-04-2014, 05:18 PM Thread Starter
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Date registered: Mar 2014
Vehicle: 2010 E350
Location: Iowa
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Tires

First of all, I'm not trying to outsmart the Mercedes engineers, but I know at some point, sooner than later, it's going to be time for new tires and I'd like to move away from the low
profile staggered tires and wheels. We only have 20,000 miles on the car
now and the last time we were in, we were told we only had about 5,000
miles left on the rear tires. I'm planning on replacing the
wheels with the same version in chrome. I'd like to be able to rotate
all 4 tires and increase the tire life, improve the ride and decrease the tire noise.

Here is my question. If I change the wheels out and go to a standard
size tire, what size do I need go to not change the speedometer? I
believe some of the E350 in the 4-matic's do not run the staggered tires and
tires so would that same size tire and wheel work on our car which is
not the 4-matic. Would I be making a mistake doing all this?
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post #2 of 7 (permalink) Old 06-05-2014, 09:15 AM
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What size front tire are you running now ? In order to not mess up the speedo, you will have to replace your present wheel/tire combo with one that's the same total diameter.

For example, lets say you are running 245/50-19's on the front. That's 28.7 inches tall. With a staggered setup your rears would be 275/45-19. That's 28.8 inches tall. Only a 2 mm difference and close enough to equal. In this example you would only have to change the back 2 tires to the front tire size, assuming there is plenty of tread left on the front pair and ignoring the probable wheel width difference.

Going on the assumption that you want to go with a smaller diameter wheel, and still using the 28.7 inch diameter, you can go with 245/55-18 ( 28.6 inches ) or 245/60-17 ( 28.6 inches )
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post #3 of 7 (permalink) Old 06-05-2014, 10:02 AM
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If you have 9 inch wide wheels up front,and 10 wide on the rear,might be a problem

1999 s320. and 83 300sd quit driving,people make me nervous
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post #4 of 7 (permalink) Old 06-05-2014, 03:32 PM
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You have a package of some kind, I presume? The base car came with 17s and you have staggered 18s?

If that's the case then you are running 245/40-18 in the front and 265/35-18 in the rear.

Are you going to go with 18" wheels or 17s? If you're looking for comfort in your ride and all you have is an appearance package then I'd go with 17s. 17x8 would be a good fit and you'd use the 245/45-17 size. Double check for clearance at the caliper, of course.

If you want to stay with 18s, then you'd use the front tire size all around, 245/40-18.

There are lots of great aftermarket wheels out there as well, just work with a good vendor to get a quality set. I'd recommend Tire Rack as a place to start your search, for a couple of reasons. One, they don't sell junk, and two, once you've input your car into their search, it won't return stuff that doesn't fit. You can pick rims and see how they'd look on your car, too. All good stuff. And if you buy from them they will ship them to you, mounted and balanced, with lug bolts, etc. All you need to do is bolt them on...paying attention to directional arrows if those apply to the tires you buy. Then you don't even have to pay a shop to mount them for you. Alternatively, you can use Tire Rack to find what you want and then shop elsewhere for the wheel brand(s) you choose, since you know those will be okay.

Hope that helps, good luck.

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post #5 of 7 (permalink) Old 06-05-2014, 07:38 PM
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What is commonly neglected is checking the tire rpm for replacement.
Nominal sizes when it comes to tires have pretty loose tolerances and the same sizes can have up to 10% different Rounds Per Mile.
I am not sure what your 2010 E had originally, but I believe this is the wheel from 2008-2009 model and it is 16"
I have 2 of those for sale.
Avoid chrome unless you are risk taker.

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post #6 of 7 (permalink) Old 06-05-2014, 07:40 PM
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Here's some help:

Tire Size Calculator

Phil

Prior MBs:
1971 250, 1983 380SEL
1986 190E2.3, 1987 300TD
1994, 2003, 2005 SL500s
2001 E320 4Matic
2011, 2012 E350 4Matics
2012 S550 4Matic
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post #7 of 7 (permalink) Old 06-05-2014, 08:03 PM
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Quote:
Originally Posted by PLeeson View Post
Here's some help:

Tire Size Calculator
As I said, above >>> huge margin for error.

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