Forgive me if this was asked already, I didn't serach to hard for an answer, just a quick browsing.

Anyhow, I am going to put some wide tires on the back of my 1985 Trans Am. I was wondering what is the widest you can go on a 15 inch rim without modifying anything? I am sure someone here has or had experience doing this.

Someone where I work said I should try 295 50 15. I figured I'd better ask 1st before trying it.

Thanks

 

ah come on guys... you can't tell me that no one has ever figured this out. Someones gotta know!

 

295 50 15 will fit on a 8-10" rim. However, the 295 is .6" taller than the stock tire which will cause your speedo to be a bit out.

A 275 50 15 is almost as wide and has the correct height (25.9").

 

aren't the 15" rims 15x7?

 

Factory rims are 7" wide.

A 275/50 will have about 10.5" of tread. A 7.5-9.5" rim should be used.

 

My rims are 15 x 7 factory. I am going to get 275 or 295 so I think I will go with a 15 x 8 or 15 x 9 rim for the rear. I am keeping my 245's on the front.