Log pattern and offset

[fpeck1948]

I am interested in the in a set of wheels,but the owner doesnt know any details about these rims other than they cam off a 85 Buick regal.

Can anyone tell me where I can go to find out details about this year of rims so I can find out the pattern and offset details for these rims?

Thanks
Frank

[GStage1]

Pattern is the standard 4.75" bolt circle.

Offset is probably close to the original design....4.375" but a lil more on the 78-87 Regals 4.5 to 4.625"