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Max pressure ratings and real life application

  • Thread starter Thread starter JEEPRUSTY
  • Start date Start date
It is amazing how much tyre pressure can increase, when warm. I just bought an old drag bike and, since I had the front fender off, I noticed that the tyre had expanded to the point that it had rubbed on the bottom of the fender.

Drag tires are designed to increase in diameter at high speeds. It is a form of automatic transmission going into overdrive. The tires on that drag bike probably don't meet DOT standards for street use.

Regular street tire expand only a very tiny amount.

Contact the tire manufactor to get the correct pressurs for your type of riding. Having considerable track experience each mf will be different, and by a considerable amount. Some tires add more psi when warm than others. And 1 pound can make a difference.

The tire manufacturer can't know the optimum pressure for each combination of motorcycle, roads, loads and speeds. Stick with the 10% rule.
 
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