Tire Sidewall Information

RXA0149658-UN-13AUG15

Displayed on tire sidewalls is information useful in selecting and working with tires.

A - Tire section width –Width in millimeters.
B - Aspect ratio – Ratio of height to tire section width.
C - Construction type –R = Radial, B = Bias.
D - Rim diameter –Diameter in inches (not total tire height or group size).
E - Load index –Numerical code indicates tire load-carrying capacity. Higher load index number designates higher load capacity.
F - Speed rating –Maximum speed tire is designed to travel.

Additional information that may be displayed on sidewall.

Tread pattern - Indicates tread design and tire usage. Designs offered are all lug- or bar-type tires and are separated into one of three specifications: R1, R1W, or R2.
Direction of rotation - Icon (usually an arrow or group of arrows) indicating tire rotation direction.
Manufacturer name - Name of tire manufacturer.
Max load and pressure information - Maximum load a tire is permitted to carry under specified pressure and operating conditions.
Safety warnings - Important information provided by tire manufacturer.