2002 Lexus GS 430 User Guide 1 - Page 49

BRIDGESTONE/FIRESTONE TIRE LIMITED WARRANTY W A R R A N T Y These speed ratings are based on laboratory tests under specific, controlled conditions. While these tests relate to performance on the road under those conditions, remember that real-life driving is rarely identical to any test conditions. Your tire's actual speed capability may be less than its rated speed, since it is affected by factors such as inflation pressure, load, prior alteration or damage, driving conditions, alignment, wear, vehicle condition and the duration for which high speed is sustained. A tire's speed rating becomes void if the tire is repaired, re-treaded, damaged or abused, or otherwise altered from its original condition. Thereafter, it should be treated as a non-speed-rated tire. The tire's speed rating designation appears on the tire sidewall with the tire size. Examples: P215/65R15 88H P225/50VR16 91V 185/70SR13 Tire Spinning Safety Warning Spinning a tire to remove a vehicle stuck in mud, ice, snow or wet grass can be dangerous. A tire spinning at a speedometer reading above 35 miles per hour (55km/h) can, in a matter of seconds, reach a speed capable of disintegrating the tire with explosive force. Under some conditions, a tire may spin at twice the speed shown on the speedometer. This could cause serious personal injury or death to a bystander or passenger, as well as extensive vehicle damage. Never spin tires above a speedometer reading of 35 miles per hour (55km/h). In these examples, the "H," "V" and "S," respectively, are the speed ratings ("R" indicates that each of the tires is a radial). The "88H" and "91V" in the first two examples are called "service descriptions." 49 Y o u r W a r r a n t i e s i n D e t a i l