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Old 09-14-2015, 07:03 AM   #15 (permalink)
CapriRacer
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Quote:
Originally Posted by Focus-Ak View Post
I got curious about the data in Lambillotte's slide #30 (in a powerpoint found through Barry's web page on tires). Here is a parameterized chart of the data for the 28 tires, with tire width as a parameter, and colors indicating rim diameter. The chart gives rolling force vs. tire profile. ........
Which is why I did a regression analysis based on the 3 "size" numbers for RRC. What was interesting was the r squared value was pretty low - indicating there was something else going on.

I actually did quite a few before I settled on that one.

Nevertheless, in every case, the regression said that bigger was better - and I think I understand why that is so. There must be some amount of variability EVEN though the tires are supposed to be "the same". "The Same" is kind of a misnomer in that the construction for each size MUST be different - but they ought to be proportional - and it appears they aren't.

I wish we had more data to work with.
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