All tyres feature a coding system that explains their technical capabilities. Built into the sidewall, this code provides information on the tyre's construction, size, load carrying capaicty and speed rating.
A = Section width of the tyre (in millimetres)
In this example it shows that the tyre is 305mm wide.
B = Aspect ratio (percentage of width)
In this example the ratio is 30%.
C = Rim diameter (in inches)
In this example it shows that the rim is 19" in diameter.