Presta valves

"Ben" <[email hidden]

Quoted message said:

I had my first flat tyre on my bike, and I have the skinny valves, presta ?
Are these valves a pain or what, I had so much trouble to inflate the
tyre,
the valve kept pushing in, then when I held it, air would not go in, and
yes
I loosened the valve like your supposed to.

So is it me, or are these little buggers a pain in the backside ?

Sorry dude.. it's you. :-)

What sort of pump? Push the pump on and grip around
the tyre, pushing the pump onto the valve. A good pump
should grip the valve. You might have valves that are too
short for your rims.

hippy

Ben said:

I had my first flat tyre on my bike, and I have the skinny valves, presta ?
Are these valves a pain or what, I had so much trouble to inflate the tyre,
the valve kept pushing in, then when I held it, air would not go in, and yes
I loosened the valve like your supposed to.

So is it me, or are these little buggers a pain in the backside ?

Greetings,
I have been using Prestas for years, wouldn't be
without them. They can be a pain at times, but then so can any bike
valve. Remember the old ones with the little sliding piece inside the
metal casing? They were more fun.
Regards,
Ray.

hippy said:

Ben said:

I had my first flat tyre on my bike, and I have the skinny valves, presta ?
Are these valves a pain or what, I had so much trouble to inflate the
tyre, the valve kept pushing in, then when I held it, air would not go in, and
yes I loosened the valve like your supposed to.

So is it me, or are these little buggers a pain in the backside ?

8<

Quoted message said:

What sort of pump? Push the pump on and grip around
the tyre, pushing the pump onto the valve. A good pump
should grip the valve. You might have valves that are too
short for your rims.

i have recently moved to these valves on my 'new' bike.

i must say they get a bit of geting used to.
it does depend on the pump as to how well they work.
my first leight weight pump did not grip the valve stem very well
air leaked and i hardly got more than 5-psi in the tyre,
but i lashed out and purchased a "wrench force mini road"
a couple of weeks ago. so changing that rear tyre with
the hooooj bulge was a breeze 😉 now puching ~85 psi

its one of those 'good tools/bad tools' things, IMHO 😉

cheers,

kim

Car valves (Hauser?) are handy. Some reckon that they can't hold pressures over 90psi well, I dunno, I ride MTBs.
My whizz-bang Specialised Stumpjumper has those wierd 18 spoked Schimano wheels which means that I gotta have presta valves (due to the narrow/tall rims), so pumping them means I gotta remember to unscrew the top of the valve-thing & tap it once to 'un-seat' it ready for a pump (if it was part of the HSC I would have failed it).

I wonder what's so [censored] about car valves, apart from that they're also used for cars?

"Marx SS" <[email hidden]

Quoted message said:

Car valves (Hauser?) are handy.

Schrader?

Quoted message said:

Some reckon that they can't hold pressures over 90psi well, I dunno, I
ride MTBs.

They do. I used the 'car' valves on my mtb with S-Licks >90psi.

Quoted message said:

I wonder what's so [censored] about car valves, apart from that they're also
used for cars?

http://www.geocities.com/cyqlist/valve.html

hippy

hippy said:

Marx SS said:

Some reckon that they can't hold pressures over 90psi well, I dunno, I
ride MTBs.

They do. I used the 'car' valves on my mtb with S-Licks >90psi.

i recon the issue is "reliably" hold pressure over 60psi,
which seems to be the common upper limit of 'air compressor'
gadgets at servos

i have found that a lot of valves on cars do not hold over 40psi
reliably, so if your bicycle valves hold 90psi, you're on a winner 😉

Quoted message said:

Quoted message said:

I wonder what's so [censored] about car valves, apart from that they're also
used for cars?

they've been manufacutred *cheaply* in large quantities, so quality suffers.

cheers,

kim

"Kim Hawtin" <kim@ratbag> wrote in message
news:[email hidden]...

Quoted message said:

hippy said:

Marx SS said:

Some reckon that they can't hold pressures over 90psi well, I dunno, I
ride MTBs.

They do. I used the 'car' valves on my mtb with S-Licks >90psi.

i recon the issue is "reliably" hold pressure over 60psi,
which seems to be the common upper limit of 'air compressor'
gadgets at servos

i have found that a lot of valves on cars do not hold over 40psi
reliably, so if your bicycle valves hold 90psi, you're on a winner 😉

Quoted message said:

Quoted message said:

I wonder what's so [censored] about car valves, apart from that they're also
used for cars?

they've been manufacutred *cheaply* in large quantities, so quality

suffers.

I think that's more a limit of the pump equipment, not the valves.

I think this has been mentioned before, but Schrader valves are
used on suspension forks which hold 200+ psi. There should be
no problem with 90psi, other than the crappy service station
pumps failing to get that high - which happens a LOT.

hippy