Quote:
Originally Posted by wolydotmatrix
Not to continue off topic, but I guess what im trying to figure out (in relation revolutions per mile) is that if a tape measure was wraped around a loaded tire @32psi and then increased to 50psi would the tape read a longer or shorter distance. How much pressure affects how many revs per mile?
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There's a section of the tread, where it touches the road, that is flat. That flat section is shorter than the free tire's curved section. So yes, it is shorter circumference.
What matters more is the reduced radius from hub to flat spot. That's the effective radius of the wheel. That flat spot moves around the tire as it turns, making it behave like a smaller tire. Imagine a hard wood or steel wheel in that smaller diameter that doesn't deflect at all. That's the size you use for calculating revs/mile.
I went looking for more answers, and found this one right back here:
http://ecomodder.com/forum/showthrea...ius-12039.html
