A tire with higher speed rating results in better handling. Below is a chart of speed ratings along with the corresponding speeds they represent. Speed ratings apply only to the tire itself, and not to a particular vehicle. Putting a tire rated for a certain speed on a vehicle does not mean that the vehicle can be safely operated at the tire's rated speed.
Speed Rating Speed Category
Q 160 KM/HR
R 170 KM/HR
S 180 KM/HR
T 190 KM/HR
U 200 KM/HR
H 210 KM/HR
V 240 KM/HR
W 270 KM/HR
Y 300 KM/HR
ZR > 240 KM/HR
Load range designates the tires' construction as it relates to its load carrying capacity and is represented by a letter. It also indicates the air pressure at which maximum load carrying capacity is achieved.
Standard: Standard Load tire construction for light-weight trucks carrying no or light loads
XL – Extra: Has slightly higher load carrying capacity than a Standard Load tire for pickups carrying light loads
C – 6 Ply: Has 6 Ply Construction (thicker tire construction under the tread) construction and is for a light pickup (1/4 ton) with a full load
D – 8 Ply: Has 8 Ply Construction (thicker tire construction under the tread) construction and is for a mid-sized pickup with a full load
E – 10 Ply: Has 10 Ply Construction (the thickest tire construction under the tread) construction and is for a heavier ½ ton or 1 ton pickup under a full load
Qualified tires that have the 3 peak mountain snowflake (3PMS) designation on their sidewall. It indicates a higher level of winter capabilities, including traction in snow and on ice compared to an all-season tire.