pumps

"Arthur Clune" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

Frank <[email hidden]> wrote:

: Brace the valve end of the pump against something solid (to push

against)

Quoted message said:

This can be very tricky - verges and hedges don't supply the necessary.

Personally I think that getting back on the road quikcly and with less fuss is worth 20 quid.

But the HPX's has a narrower cylinder (the only reason that higher pressures can be got with less
force) so it takes longer to pump as less air goes in with each stroke.

Personally I prefer something lighter, I have to carry it on every trip and only ever use it
occasionally.

Quoted message said:

Personally I prefer something lighter, I have to carry it on every trip and only ever use it
occasionally.

I only use mine occasionally too but like don't like those rides spoilt by the puncture. With the
HPX, I can carry on at _full_ pressure. Lower rolling resistance (and less hand/arm/back ache) makes
it worth carrying the extra 100g. Yes, the HPX is heavy, but the difference is only that much.

~PB

In article <[email hidden]>, Frank <[email hidden]> writes

Quoted message said:

The only downside of the cheap pumps is they can explode if you treat them without respect.

Can they?

I think I've dissed my Brompton Zefal hpr - the central shaft thing is all rusty, so I no longer
mount it on the frame.

I've also got a Trek mini pump - very compact.

--
congokid Eating out in London? Read my tips... congokid.comcongokid.comOpen ↗

In article <[email hidden]>, [email hidden] says...

Quoted message said:

In article <[email hidden]>, Frank <[email hidden]> writes

Quoted message said:

The only downside of the cheap pumps is they can explode if you treat them without respect.

Can they?

I think I've dissed my Brompton Zefal hpr - the central shaft thing is all rusty, so I no longer
mount it on the frame.

How do you get one of those off the frame? I haven't needed to use mine yet but I have just thought
about it and I don't know how it comes off.

Colin

"congokid" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

In article <[email hidden]>, Frank <[email hidden]> writes

Quoted message said:

The only downside of the cheap pumps is they can explode if you treat

them

Quoted message said:

Quoted message said:

without respect.

Can they?

Yep at high pressures the piston can get blown out of the back if you aren't holding tightly and you
nudge the valve releasing the tyre pressure.

Quoted message said:

I think I've dissed my Brompton Zefal hpr - the central shaft thing is all rusty, so I no longer
mount it on the frame.

put some grease on it.

"Pete Biggs" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

Quoted message said:

Personally I prefer something lighter, I have to carry it on every trip and only ever use it
occasionally.

I only use mine occasionally too but like don't like those rides spoilt by the puncture. With
the HPX, I can carry on at _full_ pressure. Lower rolling resistance (and less hand/arm/back
ache) makes it worth carrying the extra 100g. Yes, the HPX is heavy, but the difference is only
that much.

I was only joking about the weight, If I were serious I would make more effort to lose the 7000g
spare tyre I take with me on every trip.

But seriously It seems a bit pointless getting extra light components, derailers etc and then
carrying the extra weight as a pump.

The true reason I don't carry an HPX is because I'm a skinflint.

In article <MPG.19076e6fca22aeca989930@localhost>, Colin Blackburn
<[email hidden]> writes

Quoted message said:

In article <[email hidden]>, [email hidden] says...

Quoted message said:

Quoted message said:

I think I've dissed my Brompton Zefal hpr - the central shaft thing is all rusty, so I no longer
mount it on the frame.

How do you get one of those off the frame? I haven't needed to use mine yet but I have just thought
about it and I don't know how it comes off.

You just grab one end and push it toward the other end, compressing the spring located in the
handle. This will free it from the spikes that hold it.

It's probably a good idea to take it off the bike when it rains, as this is how mine got rusty.
Still works, though.

--
congokid Eating out in London? Read my tips... congokid.comcongokid.comOpen ↗

Adrian Boliston said:

Surely all that slime can't do much for tube weight! They say weight on the wheels feels 3 times
heavier than weight on the bike!

"They" have quoted figures up to seventeen on occasion, which only goes to show that "they" are
ignorant of elementary mechanics.

In fact, weight at the very outside of the wheel (where it is not) would be twice as significant as
non-rotating weight for retarding acceleration only, having no effect on flat riding at steady speed
and exactly the same effect as any other weight uphill.
--
David Damerell <[email hidden]> Distortion Field!