RE: skinny tyre
> it will allow me to use the 26 inch rim in a 24 inch race so i don’t have to
> take two similar unis to biejing and euro cycle. Can any body confirm this for
> me, I’m pretty sure some of the swiss team at euro cycle were racing on 26x1 s
> does any body else on the NG do this? The diameter is spot on the 61.8 cm
> allowed in the IUF rules, I suspect this is why that diameter is given?
Actually, that diameter was arrived at by taking the nominal maximum wheel size,
24", and adding a third of an inch to allow for slightly larger 24" tires, and
fixing the maximum diameter at 24.333 inches, which is 61.8 cm.
Wheel sizes, as measured by rim size or by the size printed on the side of a
tire, are very rough. We realized we needed to set an exact diameter as the
maximum. Then, anything that fits within that maximum would be legal, even if it
started life as a nominal 26" rim.
To work optimally, at UNICON or other large competitions, racing wheels should
be measured to make sure they comply. This is usually not an issue as most
racers are on recognized tires. But any unusual wheel should be measured.
> hopeing someone knows, i don’t want to be disqualified on a techniality.
Give your wheel a good measure, and if it’s within the 61.8 cm, you’re fine.
According to my calculation, a 61.8 cm tire will have a 194.15 cm (76.45")
circumference. So another way to measure tires would be by rollout. Then all you
need is a measuring tape with some marks on it. Does anyone dispute my
Stay on top, John Foss, the Uni-Cyclone http://www.unicycling.com
“I’m not into pain. I’m into juggling.” - A grandpa with small child at the
Davis Picnic Day, walking away from the free unicycle lessons toward the free
juggling lessons (and already able to juggle!)