Back in the 70s Silca made gum rubber gaskets for their air chucks.
They easily fit and sealed on just about every Presta stem we encountered. We had them on all of our shop floor pumps and even the air line from the compressor.
I had a Silca chuck on my Medai floor pump and the gum gasket lasted years even with latex tubes that needed to be pumped up every day.
The black rubber replacements have never worked as well!
Chas. Colerich Oakland, CA USA
John Thompson wrote:
> On 06/03/2010 02:36 PM, verktyg wrote:
>
>> I actually "prefer" the look of threaded presta stems. That's what
>> presta valve stems looked like when I first started using them in the
>> early 70s. A few cheap sewups and cheap tubes had smooth stems at the
>> time so smooth became equated to cheap!
>
> I've come to dislike threaded tube stems because they shred my pump gaskets.