What is a 185/70 R14 (88T) tire?
Tire designation is a perfect example of mixed metric and imperial units.
The first number 185 on your tire indicates the width of the tire in millimeter
. After the slash is the aspect ratio, in this case, the sidewall height is roughly 70% of the width of the tire. R stands for radial tires. 14 is the diameter of the wheel in inches
on which the tire fits. 88 is a code number for the maximum load and T is the rating for the maximum speed. S+M I think stand for snow and mud but not quite sure.
Actually, there is a very good page from Michelin for tire designations:
Hope this helps.