15x7jj, and 15x8 tire size help!!

[jrodmma]

hey guys, i tried to search the answer for the following question, and couldnt come up with a solid answer, so thought id politely ask it for the millionth time, and hope the regulars dont burn me too bad, (but if they do, im a big boy, and can handle it).
i found some new rims for the 82 calais, 2 15x7jj and 2 15x8 olds rallies (ss2's maybe??) my question, is how big of tire, can i go without looking silly, on these rims, front, and rear?
any input will be appreciated, and pics would be greatly appreciated.
thanks guys.

[88hurstolds]

It depends on the offset, are they factory?
Are they SSIIs or SSIIIs? Bolt on or snap on center caps.
I know GM didnt make 15x8s.
I know some run as big as 275 60s but thats about as far as you can go and the offset is a factor.

[jrodmma]

heres a couple pics of the re-conditioned rims, and 235's all around.

[88hurstolds]

Looks good, I did the same but I went with 255 60's in the rear.
Not sure why GM stuck 215's on these cars.

[jrodmma]

i would like to go to 255's in the rear, but got a great deal on a set of 4 235's. But ya, your right 215's are out of the question.