See also:

Load
The maximum load is the sum of the weight of the occupants and the cargo. The greater the weight of the occupants, the less cargo that can be transported ...

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

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 ...