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 ...

In cargo area
Open the right-hand side panel in the cargo area. ...

Length, wheel base
Length, wheel base 1 Wheel base: 110.6 inches/2,810 mm 2 Vehicle length: 182 inches/4,624 mm ...