Tire maintenance - Tire speed category

Exceeding the maximum speeds shown on the following page for each type of Nokian tire will cause the tire to build up excessive heat which can cause tire damage that could result in sudden tire destruction and rapid air loss. Failure to control a vehicle when one or more tires experience a sudden air loss can lead to an accident.
 
In any case, you should not exceed reasonable speeds as indicated by the legal limits and driving conditions.
 
Although a tire may be speed-rated, we do not endorse the operation of any vehicle in an unsafe or unlawful manner. Speed ratings are based on laboratory tests which relate to performance on the road, but are not applicable if tires are underinflated, overloaded, worn out, damaged, altered, improperly repaired or retreaded. Furthermore, a tire’s speed rating does not imply that vehicles can be safely driven at the maximum speed for which the tire is rated, particularly under adverse road and weather conditions or if the vehicle has unusual characteristics.
 
IMPORTANT:
In order to maintain the speed capability of the vehicle, replacement tires must have speed ratings equal to or higher than those fitted as original equipment (as indicated on the vehicle tire placard or in the owner’s manual). If tires with lower speed ratings are fitted, the vehicle’s handling may be affected and the speed capability of the vehicle will be lowered to the maximum speed capability of the replacement tires as indicated in the table above.
 
REMEMBER, High speed driving can be dangerous and may damage your tires. Always correlate your speed to weather conditions. When driving at highway speeds, correct inflation pressure is especially important.