Speed ratings signify the safe top speed of a tire under perfect conditions.

Vulcan Tires Sales specifies the speed rating of a tire in two ways:

1.) Listed inside the tire size itself before the "R" Example: 195/65HR15, the preceding size is an "H" speed rated tire.

2.) Listed after the tire size after the "load rating" Example: 225/45R17 92V, the preceding size is an "V" speed rated tire.

NOTE: The speed rating of a tire has nothing to do with the actual size of the tire. So a 195/65R15 89H tire can be substituted for a 195/65R15 89S tire. However, to maintain the performance characteristics of the vehicle it is recommended that a higher speed rating be substituted.

NOTE 2: Light truck tires are not required to have speed ratings.