15" tire sizes?

I am having trouble locating information regarding 15" tire sizes for my 71 Skylark. I have 15" x 6" rims up front and 15" x 8" rims in the back. The only thing I could come up with was a G-60-15 which seems to me to be an old sizing system, what are todays equivalent sizes? I tried Tire rack and Coker tire but have had no luck.

 

http://lmgtfy.com/?q=tire+size+conversion+g-60-15

:laugh:

The first one down (tire size helper) has a few charts.
Hope this helps.

 

From the factory you could order as an option G-60-15 tires that would come on the 15x7 rallye wheel. Today's equivalent is a 245-60-15 tire. They'll be a little stretched on a six inch rim but probably not anymore than the 295-50 I run on a 15x8 rim. As an example the 295 is recommended for rim widths from 8 to 10 inches by BF Goodrich. The 295-50 and 245-60 are essentially the same height which is one reason I run the combination. The 245 goes 782 revs per mile to the 295's 780 revs.

 

Thanks for the feedback.
I did some more poking around and came up with these tire sizes, in case anyone else does a search for tire sizes.

Original 15" tire size (for a GS) was G-60-15, which from my search roughly translates to a GR/78/15 (another old size).

Example: P265/50/15, the 265 is width (kind of a wide tire) the 50 relates to the height. As the tire sizes are listed here the tires get skinnier and taller.

Current tire sizes are:

265-50-15 widest
255-55-15
235-60-15
225-70-15
215-75-15 most narrow

Now you can mess with these numbers a bit when shopping for tires and get a wider/taller, wide/shorter, or narrow/taller or shorter combination.

I have decided on a 225-60-15 touring tire for all four corners for now. I have 225-70-15's on the front now and they are just a bit too tall.

Lee