R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

recommended wheels and Tires

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Old Jun 23, 2017 | 11:42 AM
  #1  
szulkarn's Avatar
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R280 L
recommended wheels and Tires

hi all,
i'm a new user here.
i own a R300 L 2011.
my stock ri
m is spec is 255/55R18 8Jx18 ET67 5x112
i would like to upgrade the wheels to a 20 inch, but i'm not sure what maximum offset i can go so that the wheels do not comes out of the fender.

also, what tires size is optimal for comfort. the roads that i drive in are a mixture of 30% potholes of all sizes/ 30% tar asphalts/ 30% concrete cement roads. can i go above 55?

thank you.
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Old Jun 23, 2017 | 11:54 AM
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2015 Cadilac Escalade ESV, 2010 MB R350 Diesel
Since the speedometer is way off on these vehicles, you can keep the aspect ratio just about the same. There are other posts on here about tire sizes and offsets.
I would suggest driving with a gps and see how much the speedo is off by and then you can adjust tire size from there.
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Old Jun 24, 2017 | 02:10 PM
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2005 C240 2011 R350
Originally Posted by auto385
Since the speedometer is way off on these vehicles, you can keep the aspect ratio just about the same. There are other posts on here about tire sizes and offsets.
I would suggest driving with a gps and see how much the speedo is off by and then you can adjust tire size from there.
huh? Since when? this is the first time any one brings this up. Maybe its just yours?
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Old Jun 24, 2017 | 03:04 PM
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2015 Cadilac Escalade ESV, 2010 MB R350 Diesel
I've seen this on 4 MBs so far.
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Old Jun 26, 2017 | 11:57 AM
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2015 Audi S4, 1982 Fiat Spyder, 2010 R350, 2013 E550 Cabriolet
My speedometer is spot on or sometime off by no more than 1mph measured by independent GPS. GPS will vary by that much on an instant reading.

Sorry for the hyperlink above to e b a y. I didn't enter it, but can't remove it.

Last edited by gforaker; Jun 26, 2017 at 12:05 PM.
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