"Steve Pedder" <
[email protected]> wrote in message
news:Ku8ca.71633$L1.11329@sccrnsc02...
> If anyone is runnning 700x32's with Shimano Flight Deck, kindly share your tire
> circumference setting. Not that it matters, but I'm using some Ritchey SpeedMax Cross tires
> and a 6500 head unit.
>
> Thanks...
Why don't you do a "rollout", and get the number for yourself? It is generally more accurate than
depending on a published "average".
Position the valve stem at the 6 o'clock position, and mark the spot (it helps if you have an
assistant). Push the bike forward, observing the valve stem, and applying some weight on the
handlebars. I like to roll forward for 3 revolutions. When the valve stem reaches the 6 o'clock
position again, mark the spot. Then, use a tape measure to find the distance between the first and
last spots. Divide by the number of revolutions, and viola, you've got your exact circumference.
Note: If you're really anal about it, you can repeat this every month or so, to account for
tire wear.
Gary G.
