Quote:
Originally Posted by Ecky
Something else to consider - while a larger tire may have lower RR at a given pressure, the pressure ratings for tires of different sizes are different. ....... [
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Ah ..... not exactly. All standard load passenger car tires (the most common type) have a rated pressure of 35 psi, except for those tires who use the metric system, then it's 2.5 bar (250 kPa, ~36 psi).
Please note: This is different than the max usage pressure which is sometimes written on the sidewall (and the other times what is written there is the rated pressure.)
This is different than bicycle tires because bicycle tires assume a single rider and a relatively narrow range of weight, while a car might have many passengers and a wide range of weight.