Prestavalve threads?

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

Quoted message said:

Hi all

Does anyone know what the thread size is on a presta valve - that is
the smaller dia thread nearest the nipple - I'm looking to machine a
better adapter to use a compressor but the thread is not an engineering
thread I can find - I'm guessing its specific to the cycling world so
I'd appreciate some help.

Mark C

A threaded adapter will still leak through the threads. I think you'd
be better off getting a dedicated Presta air chuck, like this one from
Bike Tools Etc.: http://tinyurl.com/45xts

Jeff

genfella said:

Does anyone know what the thread size is on a presta

valve - that is

Quoted message said:

the smaller dia thread nearest the nipple - I'm looking to machine a
better adapter to use a compressor but the thread is not an engineering
thread I can find - I'm guessing its specific to the cycling world

Standard metric coarse, m5 x 1.0. ( fine being m5x 0.8)
What's an 'engineering thread'?

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Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971