Eric,
The rolling radius is the distance from the center of the axle to the
ground with the bike sitting on the ground. 12.47 is the advertised
rolling radius of a Dunlop Qualifier K525 ... If you want to talk
distance per wheel revolution I'll take that too .. for the 12.47
rolling radius stock tire that would be 6.53 feet. I can't guess at
the rolling radius of the 18 inch tire .. but I could compute it if I
knew the gearing. I have to have one or the other.
campbell
----- Original Message -----
From: "Eric Harnish" <[EMAIL PROTECTED]>
Subject: Re: Rpm at 70
> TC what is a rolling radius of 12.47 inches ?
> My tire is a little over
> 6 feet .
>
> TC wrote:
> >
> > Phil,
> > I get approximately 4450 RPM in 5th at 70 mph for a "stock" Vmax
...
> > this would be a "stock" Vmax with a 12.47 inch rolling radius
tire. If
> > your 18 inch tire had a 12.47 inch rolling radius it would be the
> > same. I need either your rollling radius or the number of teeth on
> > your front and rear sprocket, (assuming your primary drive and
> > transmission gears are stock), to compute the rolling radius
before I
> > could tell you what your 18 inch tire would do on a stock
driveshaft
> > bike.
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