Quote:
Originally posted by LarryIII
Lee,
How are you going to count the revolutions?
How are you measuing rolling radius? In fact, how did you measure to get the 1/4" difference?
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first Q: not sure as I initially thought I just might have an observer, but mbtoloczko is probably right, I would have to cover significant distance to check the diiference. If needed I would estimate from tire size and distance covered. I doubt I could get an observer to count/walk alongside for more than a block
second Q: from the mid point of the tire on my garage floor to the mid point of my hub cap. I suspect (but don't really have the foggiest, and haven't thought too much about it yet) the actual place to measure exact rolling radius might be the point where the tire is first fully in contact with the road - that's why I want to check tire differences while actually driving.