On Mon, 13 Dec 2004 16:37:52 -0800, Peter <[email protected]
>> Neither tech holds much promise for bike tires in applications where
>> weight and ride quality are important factors.
>I'd think the second approach would have some potential for
>commuter bikes. I've ridden for up to 6 miles on a totally
>flat bike tire and it didn't result in any damage to either
>the tire or the rim (even the tube was patchable), but the
>ride felt very unstable at any speed over about 12 mph.
>Shouldn't take much of an inner hard foam support to improve
>the stability enough to make for a reasonable ride at slightly
>reduced speed. The main technical issue I see is to allow
>for easy mounting and demounting of the tire.
There's a bigger one; the support structure must be firmly attached to
the rim or it will tend to creep around it when running deflated; if
it's internal to the tube, this will shear the valve stem off in short
order. Mark the tire's position on a rim sometime, ride it for a
block or so with it deflated, and then look at the tire's new
position. Now consider what would happen to the tube if it wasn't
free to flop around in there as the tire is squirming.
The solid tires used on cheap hand trucks exhibit the same failing;
they squirm around the rim while rotating. In some cases, the inner
surface wears out before the outer.
Typoes are a feature, not a bug.
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