I just replaced the tire on my 20" semcycle. I ended up with what seems a
rather nice bmx style tire (20x1.75). It was rated for pressure of 40-
100psi. I don’t think I’ve ever run higher than 60psi… and since this
tire was rated for higher, I pumped it up to 100 so I could find out if it
made a difference.
I haven’t ridden much, but I certainly felt the difference. As I’d
expect, with normal riding, the tire stays rounder (as compared to having
a flat spot when I’m running at a much lower pressure). In general, I
didn’t care for that feel. It took me a good 5 minutes to get the feel of
gliding again.
Anyway, all of that made perfect sense… then I tried stand-up wheel
walking. I made it farther, and stayed up longer than I ever had before.
(Unfortunately, that took me by surprise, and as soon as I realized I was
doing well, I fell off, hit my ankle on the pedal, and worked on simpler
stuff after that.)
I really feel like I had the tire pressure to thank for the better stand
up wheel walking. Does anyone have an explanation for that?
<snip> > > Anyway, all of that made perfect sense… then I tried stand-up wheel > walking. I made it farther, and stayed up longer than I ever had before. > (Unfortunately, that took me by surprise, and as soon as I realized I > was doing well, I fell off, hit my ankle on the pedal, and worked on > simpler stuff after that.) > > I really feel like I had the tire pressure to thank for the better stand > up wheel walking. Does anyone have an explanation for that?
Higher pressure means a smaller footprint. A smaller footprint means less
rolling resistance. Less rolling resistance means you can… well… roll
more easily. Which means you can adjust more easily.
Christopher
–
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