Quote:
Originally Posted by davelobi
I'm not convinced. Take your examples to a little more extreme to magnify the effects. Use a much larger tire and see how few revolutions it takes to any stated distance compared to the smaller one. I don't care how large the footprint is, bigger going further per rev.
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What can I say.
There's a farm with a speed bump at exactly 5 kilometers into my commute.
Or so it was when my car and tires were new. Nowadays the digits flip to 5.0 some 30 meters beyond the bump.
So, my worn tires need less rotations to get there, right?
This puzzled me greatly at first, as obviously the circumference of the tires IS smaller. But the distance the tire travels is not determined by the length as measured over the tread in free air.
It squeezes together in the contact patch.
Here's an example with the very large footprint you wanted:
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.