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Presta valves?

Old 07-16-11, 10:25 PM
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Minor change of topic.

The head on my Blackburn pump wore out, and they sent me a new one. They no longer make the head I had, which had one hole for Schrader and another hole for Presta. They sent me their "Anyvalve" head - there's a picture here: https://www.blackburndesign.com/pumps.html

As far as I can tell, since they didn't supply directions... to use this head on a Presta valve, you insert the stem deep into the head. (At least 15 mm) When the Schrader pin (yellow in the diagram) is depressed sufficiently, the locking lever will not force the pin forward like it would on a Schrader valve. The pin stays depressed. But depressing the pin, burps the Presta valve, letting out most of the air in the tube, even if you're quick about it. There's no "topping off" with this head - you start from a nearly flat tube every time, and that's annoying.

This is a lousy explanation, but I hope it makes some sense. What's the best head for inflating Presta valves? I'm thinking about doing minor surgery on this head to remove the pin. And if that fails, I'll buy a new pump or head.
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Old 07-16-11, 10:33 PM
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The new head should work just fine the way it is.
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Old 07-16-11, 10:43 PM
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He says it doesn't.
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Old 07-16-11, 10:46 PM
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Originally Posted by 10 Wheels
The new head should work just fine the way it is.
"The way it is" lets most of the air out of the tube while you're attaching it. There's gotta be a better way.

It is entirely possible that I'm missing something really fundamental here. If I am, please let me know. Seems like most pump heads now are this so-called "smart" design. My old head had a dedicated hole for Presta which did not touch the lock nut, so you could simply "top off".

Last edited by LarryMelman; 07-16-11 at 10:52 PM.
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Old 07-16-11, 10:52 PM
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Originally Posted by cyccommute
What I objected to was the blanket statement "where small air losses are critical such as high-pressure lab equipment." I would not consider an air shock to be a piece of 'high pressure laboratory equipment'.
It was certainly a piece of lab equipment and I never implied that I was talking about all possible types of such equipment. And note that in my statement I specified situations involving "air losses" and you then went off on a tangent about applications involving various flammable, corrosive, and/or toxic gases. Clearly a different application from what I was referencing and calling for different designs.
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Old 07-17-11, 08:59 AM
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Originally Posted by BarracksSi
All this bickering about one vs. the other is moot. Pumps work on both.

Finding a bike pump here in the US that works on Dunlop valves, though, is trickier.
A good presta pump works fine with these. Most presta valve adapters will screw onto them too.
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Old 07-17-11, 09:01 AM
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Originally Posted by stonefree
So I guess I'm the only person on the planet that uses the little $2 presta adapters that make it so easy to fill the tube.
I have one on each wheel so I can use my way cool purple Dudds Dice valve caps...
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Old 07-17-11, 07:48 PM
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Originally Posted by LarryMelman
"The way it is" lets most of the air out of the tube while you're attaching it. There's gotta be a better way.

It is entirely possible that I'm missing something really fundamental here. If I am, please let me know. Seems like most pump heads now are this so-called "smart" design. My old head had a dedicated hole for Presta which did not touch the lock nut, so you could simply "top off".
This head from Specialized has worked nicely for me for many years: https://www.specialized.com/us/en/bc/...jsp?spid=57291

I keep that pump at work though and use my Lezyne Alloy Drive pump at home which also has a nice head, but you need to flip the part around on the chuck to use it with Schraders (a rare thing for me).
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Old 07-17-11, 08:46 PM
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The "Smart Head" (or whatever it's called) on my Serfas pump works fine.
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