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absolutely -
in fact there are a few Cadillac OEM wheels in 17" and 18" -

for aftermarket -
get the correct OFFSET -
and don't let anyone talk you into anything wider than 8.5" -

the CORRECT tire size will fit without rubbing -
or throwing the speedo off - much
what you NEED is:

235/55/17 -
these are slightly taller than the original 225/60/16 - about 1/2 inch -
at 65mph on the speedo - your actual speed will be 66.34 mph -
or
235/45/18 -
they are very slightly smaller in diameter - 3/10 of an inch -
at 65mph on the speedo - your actual speed will be 64.26 mph -

and don't let anyone talk you into a different size -
255's are too wide - and WILL rub -
and you would have to go with a lower profile - 50's or 40's

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found another optional size for the 18's -
225/50/18 - less than 1/4 inch difference -
at 65 - you are actually going 65.56 -
What about 235/50/18 is this a option
Found sum somebody is selling?????
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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69,854 Posts
Gmo, Welcome to CF !!!

Look on the driver's door sticker - the original tire size. Now go to www.tirerack.com for the specs on that tire. The new tires should be within 0.25" of the original outside diameter of the tire due to speedo and powertrain (transmission) calibrations.

OD too small, tire does more rotations per mile, speedo is fast.
OD too large, tire does less rotations per mile, speedo is slow.

Original offset was "high positive" - 46 to 52 mm. Index on the center bore, not on the bolt pattern.

Deville wheel comparisons in www.wheelcollision.com, the 2020 catalog, Deville.

Wheel-Diagram.jpg
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,854 Posts
What about 235/50/18 is this a option
Found sum somebody is selling?????
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the 235/50/18 will fit - but is slightly taller -
speedo will register SLOW -
when showing 60 - actual speed will be 61.6 -
 

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2001 DHS
2001 Deville DHS
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11 Posts
Thanx a lot ! I really appreciate the help! And jealous that u guys get to do 60 mph on the highway ! Isn't that like 120k? All our highways are 100 k max and they write tickets like it's going out of style ! They take pictures with airplanes and everything! Anyway once again thanx very much! I've been wondering what my optons were , I may go with the 18 !
I know you said this ages ago but where da fuq are you where they are that concerned about cars traveling on the hightway. Over here they use planes to spot weed ops and catch active criminals.
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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69,854 Posts
The member whom you just quoted has not logged in since 2014 - 6 years ago. I doubt that you'll receive an answer. Hover over a member's avatar to see more info.

He was in Italy and he got his miles-to-kilometers conversion wrong. One kilometer is 0.62 mile.

I lived in Naples, Italy for 3 years on Navy submarine staff duty. Going up the Autostrada to Rome we could average 85 mph.
 
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