Is this practical

On Tue, 5 Jul 2005 23:04:45 +0100, "Pete Biggs"

p@honeydewbiggs{remove_melon}.tc said:

No, but you can test by over-inflating and leaving to stand, ie. inflating
to a higher pressure than you would ever use. If the tyre stays on with
higher than normal pressure for 18 hours then it's bound to be fine at
usual pressure fo rgood. Be prepared to loose an inner tube in a failed
test.

Ah, thanks for the tip.

Since I may have damaged the inner tubes anyway by riding on them underinflated,
I don't mind sacrificing them.

Maybe you could answer a question that's always puzzled me.

On two occasions I've accidentally overinflated a tyre, and had it come off the
rim. In each case it's been at the halfway point of a round trip. In each case,
when I stopped I found the inner tube completely deflated. BUT, and here's the
weird bit, in each case, there appeared to be no damage to the tube, and when I
put the tube and tyre back on the rim, *the tube inflated normally* and was no
problem thereafter.

I've never understood how they managed to deflate if the weren't punctured. They
both had car type (schraeder?) valves. I don't know if they were involved.

Quoted message said:

You get a *good* pump such as Zefal/Truflo HPX (full-length pump) --
search Google Groups for tips on how to attach this under the bike's top
tube. 120 psi is then not impossible with average arm-strength. If a
mini pump is essential, the Topeak Pocket Rocket can also manage very high
pressures, although it takes ages to get there because the barrel is so
small. A CO2 inflator is another way.

Sorry to keep on, but if you adopt either of thses solutions (particularly the
CO2), how do you check the pressure? I had a look on wiggle, and neither the
mini-pumps, nor the CO2 devices seem to have pressure gauges.

Can you buy a good stand alone gauge for presta valves?

Quoted message said:

By the way, a really decent track pump (eg. Silca Super Pista) will need
little effort to manage 120psi and beyond.

Hmm, I just bought a Blackburn TPS2 from Wiggle. Certainly seems well made.

Thanks for all the advice.

in message <[email hidden]>, Jinx

(') said:

Hmm, I just bought a Blackburn TPS2 from Wiggle. Certainly seems well
made.

Blackburns are generally good.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

;; making jokes about dyslexia isn't big, it isn't clever and
;; it isn't furry.

Jinx said:

Maybe you could answer a question that's always puzzled me.

On two occasions I've accidentally overinflated a tyre, and had it
come off the rim. In each case it's been at the halfway point of a
round trip. In each case, when I stopped I found the inner tube
completely deflated. BUT, and here's the weird bit, in each case,
there appeared to be no damage to the tube, and when I put the tube
and tyre back on the rim, *the tube inflated normally* and was no
problem thereafter.

I've never understood how they managed to deflate if the weren't
punctured. They both had car type (schraeder?) valves. I don't know
if they were involved.

Beats me!

/snip

Quoted message said:

Sorry to keep on,

Please feel free to keep on a much as you like :-)

Quoted message said:

but if you adopt either of thses solutions
(particularly the CO2), how do you check the pressure? I had a look
on wiggle, and neither the mini-pumps, nor the CO2 devices seem to
have pressure gauges.

Some portable pumps have gauges but not all the best ones have. A gauge
adds expense, weight, bulk & complication anyway. It doesn't matter if
pressure is a /little/ higher or lower than usual for one ride so I'm
happy to just use my thumbs to gauge pressure--dig them hard into tyre
sidewall. You get to know what correct pressure feels like after a while.

Quoted message said:

Can you buy a good stand alone gauge for presta valves?

You can. Some are rather poor though; some leak too much air; some don't
read high pressure. A got a very nice Zefal one off eBay cheaply (to
check my track pump gauge)--but I haven't seen this exact model elsewhere.

~PB

Simon Brooke said:

Blackburns are generally good.

Yeah, thanks, I know.

Colin