A tire's effective radius is different than the calculation from it's diameter.
R&T's test reported revs per mile and I calculated back from that.
Gordon Glasgow
Renton, WA
> -----Original Message-----
> From: John F Sandhoff [mailto:sandhoff@csus.edu]
> Sent: Thursday, September 20, 2001 11:08 AM
> To: Gordon Glasgow
> Cc: datsun-roadsters@autox.team.net
> Subject: RE: FW: Original Tire height
>
>
> Gordon writes:
> > My calculations were based on an aspect ratio of 82%, which might
> > not be correct.
>
> I HAVE a 5.60x14 on the rim. I know its circumference is at least 3
> inches larger than the calculated 73.1 (5280 ft/mile * 12 in/ft / 866 rev/mi).
>
> Maybe R&T was running their tests using flat tires :-)
>
> -- John
> John F Sandhoff sandhoff@csus.edu Sacramento, CA
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