Tire finding trouble please help

33IMP said

Looks like 6.50x16 was stock size for an Olds six, eights used 7.00x16.
Bolt pattern is 5 on 5, so a common bolt pattern, you should be able to find other wheels, if you have to go that route.
You could explore Tiresize.com, LOTS of info there.

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I have a straight 6. The manual says 6.50 x 16. I was surprised that the rims were only 4 1/2 inches wide.. I may try and get rims that are 5 inches wide but I don’t think the rear end could take much more than that because of how tight everything is.