Quick tire question.
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Joined: Oct 2016
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From: chandler arizona
2006 E320CDI
Quick tire question.
I have 18x8.5 all around, would it be okay to run 245/45/18 all the way around? I know the speedo would be off but not by much, discount tire said that the tire will fit on the front. I want to know if I will have any issues with the esp system etc if I get that size tires. Thank you.
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Joined: Feb 2011
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From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
I have 18x8.5 all around, would it be okay to run 245/45/18 all the way around? I know the speedo would be off but not by much, discount tire said that the tire will fit on the front. I want to know if I will have any issues with the esp system etc if I get that size tires. Thank you.
Thread Starter
Junior Member
Joined: Oct 2016
Posts: 70
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From: chandler arizona
2006 E320CDI
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From: Sacramento, CA
2018 GLC300 4Matic; 2008 ML550 4Matic; 2004 C320
Not sure what you have been running before (16", 17" diameter?), but the 18" inch diameter will definitely provide a harsher and not as comfortable ride.
I have 18's on my E350, and they ride way worse than when I had 16's on a previous E320, even with Michelin Pilot Sports all around. However, the 18's definitely look much better.
Are the 18" inch wheels you have OEM Mercedes for a W211, and are you sure that the offset will work for your car? I am pretty sure you can run either the 235 or 245 tire, as long as your rims have the correct offset and therefore will not rub.
Last edited by S70Houston; Jul 27, 2020 at 10:45 PM.
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MBWorld Fanatic!
Joined: Mar 2015
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From: Sacramento, CA
2018 GLC300 4Matic; 2008 ML550 4Matic; 2004 C320
If you look at just the numbers, a 245/45-18 will give slightly more comfort because of its larger sidewall. A 45 series on a 245mm tread width will give you 110.25mm sidewall (approx 4.3 inches). A 35 series on a 245 tread width will give you 105.75mm (~4.1 inches").
But the real question is, can you feel a 0.2" difference in the sidewall in overall comfort? If your priority is comfort, i would go with the 45 aspect ratio for sidewall.
But the real question is, can you feel a 0.2" difference in the sidewall in overall comfort? If your priority is comfort, i would go with the 45 aspect ratio for sidewall.
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MBWorld Fanatic!
Joined: Feb 2011
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From: Austin, TX
2006 E55, 2012 GLK350 & 1992 190e sportline
the side wall height is a percentage of the width so a 245 45 is going to be slightly more side wall that a 235 45. From in the car you would not be able to tell that difference in side wall height but more side wall equals more plush ride. I think tire selection would make more difference in ride that 45% of 10mm
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