I've returned to cycling after about 10 years away. My new bike has Presta type valves (I'm only used to the Car valves (Schraeder?)).
My question is this... How the heck am I meant to get my pump to stay on the valve while I inflate it to 70psi?!
I've got an SKS airworx track pump and I cannot get it to stay in place while I pump. I've tried to lock it in place with the lever up and down and it always pops off at around 60psi.
Is there a knack/secret to this or am I just being a big thicky?
Thin tyres - clamp fingers of left hand around pump, lock thumb around tyre, pump with right hand
fat tyres - depends, might still be able to do it "Jay" <[email hidden]> wrote in message news:[email hidden]...
Quoted message said:
I've returned to cycling after about 10 years away. My new bike has Presta type valves (I'm only used to the Car valves (Schraeder?)).
My question is this... How the heck am I meant to get my pump to stay on the valve while I inflate it to 70psi?!
I've got an SKS airworx track pump and I cannot get it to stay in place while I pump. I've tried to lock it in place with the lever up and down and it always pops off at around 60psi.
Is there a knack/secret to this or am I just being a big thicky?
That sounds a little odd. Are you sure the rubber sheath is on as far is it will go when you lock it in place with the lever? I've never had any trouble with my pump, and it uses a rubber ring as well.
If you have no luck, you could always try a screw on pump atachment - that certainly won't pop off...
Ben
You could
Jay said:
I've returned to cycling after about 10 years away. My new bike has Presta type valves (I'm only used to the Car valves (Schraeder?)).
My question is this... How the heck am I meant to get my pump to stay on the valve while I inflate it to 70psi?!
I've got an SKS airworx track pump and I cannot get it to stay in place while I pump. I've tried to lock it in place with the lever up and down and it always pops off at around 60psi.
Is there a knack/secret to this or am I just being a big thicky?
Is there a knack/secret to this or am I just being a big thicky?
You are unscrewing the top of the presta valve a few turns after you have taken the valve cap off, aren't you? That's something you don't have to do on car type valves.
If the valve head is coming off at 60 PSI after you have clamped it on correctly, then is it possible the pump head is very worn, or perhaps you may need to take the pump head apart and turn the insides around to convert it from schraeder to presta (although a quick google suggests that if you have the current airworx pro, it is supposed to automatically adjust to the type of valve.
-- JimP -- "We don't have a plan, so nothing can go wrong" - Spike Milligan
I've returned to cycling after about 10 years away. My new bike has Presta type valves (I'm only used to the Car valves (Schraeder?)).
My question is this... How the heck am I meant to get my pump to stay on the valve while I inflate it to 70psi?!
Pump should have a locking lever. And you should be aiming for 120psi, not 70.
Quoted message said:
I've got an SKS airworx track pump and I cannot get it to stay in place while I pump. I've tried to lock it in place with the lever up and down and it always pops off at around 60psi.
I would expect the SKS to be a good pump; they're generally a good brand. Generally you put the head on with the lever parallel to the hose, and then turn the lever until it is parallel with the valve stem; but not all pump heads are the same.
-- [email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/ .::;===r==\ / /___||___\____ //==\- ||- | /__\( MS Windows IS an operating environment. //____\__||___|_// \|: C++ IS an object oriented programming language. \__/ ~~~~~~~~~ \__/ Citroen 2cv6 IS a four door family saloon.
No experince of the pump but some duelheaded pumps require that you swap the fittings in the valve head to make it work on prestas.
I'm not sure about SKS airworx track pump though.
TR
The SKS airworx has two holes for fitting over the valve. Im using the narrow presta hole rather than the wide schrader hole. It just pops off at higher pressures. I can get it to stay on only if I have an extra pair of hands.
My question is this... How the heck am I meant to get my pump to stay on the valve while I inflate it to 70psi?!
I've got an SKS airworx track pump and I cannot get it to stay in place while I pump. I've tried to lock it in place with the lever up and down and it always pops off at around 60psi.
Sounds like it's a duff pump head to me. I regularly pump my prestas to 100 psi with a Topeak JoeBlow and there's not really any trouble to speak of.
But you have undone the screw top on the valve, haven't you? (not the dust cap, the metal valve lock on the valve head itself). First time I tried to inflate Prestas I never really got anywhere, having left that in place. D'oh!
Pete. -- Peter Clinch Medical Physics IT Officer Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net [email hidden] http://www.dundee.ac.uk/~pjclinch/
The SKS airworx has two holes for fitting over the valve. Im using the narrow presta hole rather than the wide schrader hole. It just pops off at higher pressures. I can get it to stay on only if I have an extra pair of hands.
Just guessing, but it sounds to me like you aren't undoing the valve properly.
First you need to unscrew the top of the valve. You are doing this, right?
Then after unscrewing the top of the valve, I always press it in to release a little air before fitting the pump - this is just to make sure the valve is free, as sometimes it sticks and won't open even under pump pressure. The escaping air will also blow out any bits of grit that may have got into the valve head.
It's not so easy to explain all this in words, so you might be wise to pop into a bike shop and ask someone to show you (don't worry, you won't look stupid - they've seen it all before, many times over).
It's not so easy to explain all this in words, so you might be wise to pop into a bike shop and ask someone to show you (don't worry, you won't look stupid - they've seen it all before, many times over).
Or rather, you _will_ look stupid, but they've seen it all before.
No experince of the pump but some duelheaded pumps require that you swap the fittings in the valve head to make it work on prestas.
I'm not sure about SKS airworx track pump though.
TR
The SKS airworx has two holes for fitting over the valve. Im using the narrow presta hole rather than the wide schrader hole. It just pops off at higher pressures. I can get it to stay on only if I have an extra pair of hands.
I have occasionally had the same problem with my track pump at high pressures but it's because it's getting a bit old and worn. When it happens I have to hold the nozzle on with one of my hands and pump with the other.
I have also noticed that differences between the valves on manufacturers' tubes matters. The pump can get a better grip on some than others.
