Quote:
Originally Posted by GH85Carrera
If it there is water on the road and it might even possibly be 1/16 inch of rain, slow down to 55 MPH max. Tires will hydroplane at the square root of the tire pressure x 10.
Easy example: 36 PSI tire, has a square root of 6 and then x10 =60. At 60 you will hydroplane. One reason the big trucks can go faster is they run 90 PSI or more. With a 90 PSI tire the square root is 9.48 x 10 = 94 MPH. Hopefully none of them are going 90 in the rain. They may not hydroplane but the traction on the road is lowered for everyone.
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This must be an oversimplification, no? Wouldn't a bald tire at 60 psi hydroplane before a treaded tire at 36 psi?