I acquired 4 15 x 7 SS111's before heading out of town Friday assuming their pattern would 5 on 4.75". Is there a chance they could be 5 on 5"?

 

Slim, as I believe they were on the bigger cars for only a couple years, and actually desireable for those that have them.

 

EVERY SSI/SSII/SSIII wheel ever made for RWD Oldsmobiles has a 5 x 4.75 bolt pattern, period. The 1977-up RWD Delta 88s used the 4.75" bolt pattern with the standard brakes and suspension. Only the Ninety Eights, Custom Cruisers, and D88s with HD suspension and brakes got the larger bolt pattern - and did NOT get SSIII wheels. The only Super Stock wheels made with a 5 x 5" bolt circle are the SSIV wheels from the early 1970s.

Also note that there were FWD SSIII-looking wheels used on the early 1980s Cutlass Ciera that have a smaller bolt pattern.

 

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Thanks guys.