1988 Cutlass Supreme Question

nickonometry

nickonometry

Not-quite-so-new-guy
Sep 9, 2019
32
18
Hey guys, been browsing the web and these forums but haven't found a definitive answer. I just need to know what the PCD of my 1988 Cutlass Supreme is. Some wheel fitment sites say it's 5x4.75 (5x120.65), but the company I'm working with is pretty confident that it's actually 5x115mm. Just curious if anyone knows for sure before I pull the trigger on some wheels.

Thanks!
 
nickonometry

nickonometry

Not-quite-so-new-guy
Sep 9, 2019
32
18
5x4.75....they're looking at the FWD Cutlass not the G body RWD.
Cool thanks man, that's what I figured. If my math is correct, 5x120.65 should be the metric variant of wheels I can get, so I ordered some 18x9.5's for the back to test fitment
 
Gonzo1970

Gonzo1970

G-Body Guru
Supporting Member
Sep 30, 2018
823
93
Interesting.

1988 was the final year for the Rear Wheel Drive Cutlass. The new Front Wheel Drive Cutlass was available mid-production 1988.

So, there was the rear wheel drive AND the front wheel drive available in 1988, apparently.

THATS why Im seeing the discrepancy in rim sizes (I was seeing 5x4.75 and 5x115 as well)

If you have the Rear Wheel Drive (G-Body Style) its 5x4.75

If you have the front wheel drive (ugly) style, its 5x115mm.

-Gonz
 
Injectedcutty

Injectedcutty

Geezer
Supporting Member
Nov 24, 2014
5,218
113
Louisville, KY
Cool thanks man, that's what I figured. If my math is correct, 5x120.65 should be the metric variant of wheels I can get, so I ordered some 18x9.5's for the back to test fitment
That'll be a tough fit with stock wheelwells on a Cutlass. Post up the results. I'm running a 17x8 with 4.5" BS on the rear of my 87 Cutlass with a 255/45 tire and there is about 5/16" from rubbing the frame.
 
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nickonometry

nickonometry

Not-quite-so-new-guy
Sep 9, 2019
32
18
That'll be a tough fit with stock wheelwells on a Cutlass. Post up the results. I'm running a 17x8 with 4.5" BS on the rear of my 87 Cutlass with a 255/45 tire and there is about 5/16" from rubbing the frame.
I ordered the 18x9.5's for the rear and you were right, they just did not fit. They are not off by much, i could MAYBE roll the fenders and be ok?? But I didn't want to risk it. Unfortunately the next size down in the particular rim I like is an 18x8, those fit very comfortably and I can even run some spacers now
 
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