Stop in for a cup of coffee

Well, the
I had 13" tires on a 63. Could not panic stop at a speed any higher than 45 mph without locking up the breaks and skidding on all 4 tires. Went to 14's and could panic stop from 60 mph no problem. Tires hsd AA tracktion rating on the 13's

What size tires was the 13 inch ones, and what size tires was the 14 inch ones ?

Bill