See also:

Tire identification marks
Tire size 255/50 R 19 103 Y 255: nominal width in mm 50: aspect ratio in % R: radial tire code 19: rim diameter in inches 103: load rating, not for ZR tires Y: speed rating, before the R on ZR ...

Weights
The values preceding the slash apply to vehicles with manual transmission; the values following the slash apply to vehicles with automatic transmission. ...

Minimum tread depth
Minimum tread depth Wear indicators are distributed around the tire's circumference and have the legally required minimum height of 0.063 in/1.6 mm. They are marked on the side of the tire wit ...