What is the widest tire that i can put on my 89 Bonneville with the aluminum wheels. Right now i have 215/65/15 on the front and 205/75/15 on the back. I was wondering if a 225/65 or possibly a 235/60. Would rubbing be a problem. If someone has an input on this subject help me out as i'm needing some tires soon.

Just ask a wheel and tire shop they will know for sure, but I don't think those sizes will be a problem. I have 245/40/18 on my Bonnie and she handles great.(Even with my 100LB rims)

Up in Techinfo, Tech Know-How you'll find a link to a web page that will calculate all that for you. Easy to do.

I am planning to go with either 345/50'* or 245/50'* when I get my 16 inch rims.

345!?! Damn thats w......i.....d.....e
Im not sure that will even fit!
but if it does that will defintly add some GRIP to your handling

Yeah I meant 235 my fingers just slipped on this tiny IMac keyboard.

Grr I hate posting at the library.

Damn. I was hoping you were serious. I wanted PICTURES!