Tires....

Hi All! I am finally getting down to the tires on my Midget....which is
good because that means I will be driving it soon. I have started to
look around and will probably get them from Tire Rack. The part I need
help with is the size. It has stock wire wheels and stock suspension. I
am not trying to go crazy with this- I just want a good all around tire.
The one that are on the car are 145/13's. I am guessing 175/ 60 or 70/
13's?       Thanks!

 Charles Markham
 1966 MG Midget