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What does the 91W on your tire mean?
AnswerThe W in 91W after the size code indicates a speed rating. While these tires are proably Z rated (speeds in excess of 149MPH) in the tire size the W indicates that the tires are rated to a higher speed. W and X were added since there were no guidelines about how much over 149 Z rated tires were good for.W indicates a top rated speed of 168MPH._____The "91" indicates load capacity per tire! You'll get about 1350lbs per tire.:)
What does an H mean in a tire rating?
It's a speed rating, in this case meaning 'up to 130 mph'.
Is tire pressure based on the tire or the vehicle?
The tire, the vehicle. anticipated speed, temperatures, cornering requirements and the roadway are all factors that determine the optimum inflation. Most don't need to be considered by street cars, but must be factored in for racing at high speeds.
How speed increases by pressing accelerator?
Pressing on the accelerator increases engine rpm (revolutions per minute) which in turn increases wheel/tire rpm which increases vehicle speed.
How do tire pressure monitors work?
when all tires are inflated properly, they each rotate at the same speed. there are sensors that monitor wheel speed and when one loses air pressure, it rotates at a slower speed at with the sensor then senses and sends that signal to the computer
