Hey all, I have a 1961 oldsmobile super 88, it originally had 8:50 x 14 tires. When I purchased it it has 205/65r 15. I want to get to as close to original size so as not to change the look and the speedometer. What size should I go with? As close as I can figure, will the 235/70-15 be the closest? I know NOTHING about tires. Thanks very much. Oh, and what would have been the tire diameter of the originals as well?

 

The original tires were 28.1" in diameter. 2.35-70R15 are very close to the same diameter so they should fill the wheel wells as well as the originals.

 

thanks tecar442 that helps to get a confirmation.

 

These two websites helped me with my tire selection. I went from 8.50(55) 14 to 235 / 70 - 15. I wanted to stay as close as I could to 28.1 inches.

http://www.turbinecar.com/tires.htm

http://www.miata.net/garage/tirecalc.html