Backspacing

['77 Regal]

Is the backspacing 5x4 3/4 on all Buick Rallye's? Have a '77 Regal that I would like to put repo rallye's that are 15x8 instead of my 15x7's in the back.

Scanlon
http://blowngp.com/scanlon/buick.jpg

[dryskip]

Std is 4-3/8" for a 7" wide rally

[LARRY70GS]

Are you refering to the bolt pattern? If so yes, all the buick rallye wheels share the same bolt pattern except the wheels for the big cars, they have a 5" stud circle diameter. Backspacing on Buick 15" wheels is usually in the 4-4 1/2" range.