In article <
[email protected]>,
Ozark Bicycle <
[email protected]> wrote:
>On Jun 26, 7:17 pm, BCDrums <[email protected]> wrote:
>> Do I need a doodad to do this? If so, what is it called?
>You can use a "presta stem saver", made by Wheels Mfg. Their part #
>PSS-1. Much better than a rubber grommet, IMO.
Incidentally, I use one of these on a _presta_ rim (mavic open
sport). The valve hole at the base of the tube is drilled to the same
diameter as the spoke holes - too large to directly support the metal
of the valve stem. With the hole edge pressing against rubber, tension
from the stem nut pulls on the stem-to-rubber bond, and I suspect this
contributes to valves tearing out for some people. With a washer in
place, the valve base pulls on the washer which presses straight on
the rim - the rubber of the tube doesn't see or care about the stem nut.
I had to cut the stem saver in half to fit the depth of the rim.
It's held in place by my rim tape when I change tubes.
-Luns