TIRE SIZING
#1
TIRE SIZING
I have a 10.5 et 45+ 3mm spacer rear wheels with continental dws 285/30/20 and currently have alignment done after H&R springs, and it start rubbing the fender. (looks like its rubbing the tire sidewall, but im not sure.)
I did some research on tire section widths, and realize summer tires with 285/25/20 is .2 inch thicker than my all-season tire right now, but 1 inch less in the overall diameter.
So, will it help if I downsize to 285/25/20?
or should i go for 275/30/20?
my front is 245/30/20 and its working fine.
does the rear tire aspect ratio has to be lower than the front?
I did some research on tire section widths, and realize summer tires with 285/25/20 is .2 inch thicker than my all-season tire right now, but 1 inch less in the overall diameter.
So, will it help if I downsize to 285/25/20?
or should i go for 275/30/20?
my front is 245/30/20 and its working fine.
does the rear tire aspect ratio has to be lower than the front?
Last edited by imaginetigers; 04-19-2016 at 12:24 AM.
#3
#4
MBWorld Fanatic!
30 aspect ratio for 285 on 19" is fine for rear but not 20" as diameter is too tall and would create significant error with your speedometer (and handling may also be impacted with significant difference in tire diameters between front and rear).
Also the rear should be fine without the 3mm spacer and give more clearance from fender lip to tire.
Also the rear should be fine without the 3mm spacer and give more clearance from fender lip to tire.
#5
30 aspect ratio for 285 on 19" is fine for rear but not 20" as diameter is too tall and would create significant error with your speedometer (and handling may also be impacted with significant difference in tire diameters between front and rear).
Also the rear should be fine without the 3mm spacer and give more clearance from fender lip to tire.
Also the rear should be fine without the 3mm spacer and give more clearance from fender lip to tire.
#6
MBWorld Fanatic!
Gavinccm is running 20x10 ET55 285/25-20 rears here:
https://mbworld.org/forums/e-class-c...mer-forum.html
So if you plug into wheel offset calculator for your 10.5" wide ET45 wheels, you will have 4mm more inner clearance (inside of wheel to strut housing) (outside edge of wheel will extend out or poke 16mm more). As your wheels are 10.5" wide the 285 tire will sit slightly more stretched than the 10" wide which should also give you more clearance from the tire.
https://mbworld.org/forums/e-class-c...mer-forum.html
So if you plug into wheel offset calculator for your 10.5" wide ET45 wheels, you will have 4mm more inner clearance (inside of wheel to strut housing) (outside edge of wheel will extend out or poke 16mm more). As your wheels are 10.5" wide the 285 tire will sit slightly more stretched than the 10" wide which should also give you more clearance from the tire.
I have a 10.5 et 45+ 3mm spacer rear wheels with continental dws 285/30/20 and currently have alignment done after H&R springs, and it start rubbing the fender. (looks like its rubbing the tire sidewall, but im not sure.)
I did some research on tire section widths, and realize summer tires with 285/25/20 is .2 inch thicker than my all-season tire right now, but 1 inch less in the overall diameter.
So, will it help if I downsize to 285/25/20?
or should i go for 275/30/20?
my front is 245/30/20 and its working fine.
does the rear tire aspect ratio has to be lower than the front?
I did some research on tire section widths, and realize summer tires with 285/25/20 is .2 inch thicker than my all-season tire right now, but 1 inch less in the overall diameter.
So, will it help if I downsize to 285/25/20?
or should i go for 275/30/20?
my front is 245/30/20 and its working fine.
does the rear tire aspect ratio has to be lower than the front?
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#8
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#19
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Or give me your VIN number and I can give you the partnumber for the lower ones.
#20
Super Member
How does that work? I might have to do this...
#22
Super Member
#23
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#24
MBWorld Fanatic!
But they are OEM... Just go to MB and buy them. Usaly 3 knobs is standard. So you need 2 knobs to lower it or 4 to raise it.
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ffr2014 (06-01-2016)
#25
MBWorld Fanatic!
Do you have MB part numbers for the 2, 3, 4 options? Also would these work on both the front and rear springs or are there different part numbers for the front and back?
Thanks Chris!
Cheers,
Frank
Thanks Chris!
Cheers,
Frank