Lexus SC 430 2006 Owner's Manual page 329

6-1. Specifications
The illustration indicates typical tire size.
Tire use (P = Passenger car, T = Temporary use)
1
Section width (in millimeters)
Aspect ratio (tire height to section width)
Speed category (alphabet with one letter)
Tire construction code (R = Radial, D = Diagonal)
Wheel diameter (in inches)
Load index (2 digits or 3 digits)
Speed symbol (alphabet with one letter)
■
Tire measurements
316
Section width
1
Tire height
2
Wheel diameter
3