On 16/06/2011 4:41 PM, terryc wrote:
Geoff Lock wrote:
On 16/06/2011 12:54 PM, terryc wrote:
Geoff Lock wrote:

Hm, now that you mentioned them, I had a google and, of cos, they are
available. I have always known of solid tyres on forklifts and those
solid forklift tyres weigh more than a few grams

at one stage a few decades ago someone promoted the idea of filling the
tyre with expanding foam. The idea being no punctures. Major problem was
low speed limitations, like 30kms/hr. i suspect the other problem was
recovery cycles were too low as I never saw it on the market.

Recovery cycles? Not sure what you mean there.

When the foam s at the bottom it gets squashed. on the way up it
expands, just like in an air filled tyre. If it doesn't, you end up with
flat tyres. Recovery cycles or number of revs in the life of the foam.

I see, them recovery cycles - sorta like how much "springiness was in
the foam" type of "recovery". I had visions of search and rescue
bicycles (that kind of recovery) which went out looking for other
bicycles which had solid tyres which had somehow failed the test -
whatever the test may be.

I'm glad I cleared that one up for me