Presta adapters

"nash" <[email hidden]> wrote in message
news:RH51h.215104$1T2.191807@pd7urf2no...

Quoted message said:

NE one heard of adapters if you use presta tubes. When I got my new

GT MTB

Quoted message said:

they said I had to use adapters. They had none so now I have schrader
again. What is the deal really. My old MTB took them but he said

they can

Quoted message said:

be damaged easily.

Just your thoughs thanks.

I prefer Presta valves myself but here's a link that discuses a lot of
the issues:

http://www.sheldonbrown.com/brandt/presta-schrader.html

Chas.

nash said:

NE one heard of adapters if you use presta tubes. When I got my new GT MTB
they said I had to use adapters.

No, only if you want to fill up the tires at a gas station. Get a floor
pump; they all work fine with presta valves. I've been riding 30
years, and I still don't have an adapter.

Quoted message said:

again. What is the deal really. My old MTB took them but he said they
can be damaged easily.

They also hold air better at high pressure, and are easier to use.

--

David L. Johnson

__o | Enron's slogan: Respect, Communication, Integrity, and
_`\(,_ | Excellence.
(_)/ (_) |

On Sun, 29 Oct 2006 17:40:01 GMT, "nash" <[email hidden]>

Quoted message said:

NE one heard of adapters if you use presta tubes. When I got my new GT MTB
they said I had to use adapters. They had none so now I have schrader
again. What is the deal really. My old MTB took them but he said they can
be damaged easily.

Just your thoughs thanks.

Some rims are so narrow that drilling them for Schrader valves leaves
a weak spot; others need such a long valve stem due to aero designs
that the only tubes made which will work with them are the long-stem
Prestas. In such cases, the Presta valve has what is needed to solve
a problem. If, however, the rim doesn't really need to be set up for
a Presta valve, then the Scrader provides a more useful result, since
it is much easier for the average rider to find a tire pump or
inflation source (be it service station compressor hose or whatever)
that is Scrader-accessible than one which works with Prestas. The
adapter that you mentioned is a common way to overcome the
lack-of-compatibility problem with Presta valves, but it has one
drawback; the nut on the end of the Presta core can't be loosened or
tightened with the adapter in place. (I think it's possible to make
an additional tool which would do this, but I haven't tried to do so
yet.) Since the most common way to store the adapter is on the valve
stem, adding air to the tire on which the adapter is stored has two
additional steps; the adapter has to be removed in order to loosen the
nut before air can be added, and then it must be removed again in
order to tighten the nut after the tire is inflated properly. With a
Schrader valve, it's strictly pump-and-go.

--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

In Message-ID:<[email hidden]> posted on
Mon, 30 Oct 2006 05:11:14 GMT, Werehatrack wrote: Begin

Quoted message said:

The
adapter that you mentioned is a common way to overcome the
lack-of-compatibility problem with Presta valves, but it has one
drawback; the nut on the end of the Presta core can't be loosened or
tightened with the adapter in place. (I think it's possible to make
an additional tool which would do this, but I haven't tried to do so
yet.) Since the most common way to store the adapter is on the valve
stem, adding air to the tire on which the adapter is stored has two
additional steps; the adapter has to be removed in order to loosen the
nut before air can be added, and then it must be removed again in
order to tighten the nut after the tire is inflated properly. With a
Schrader valve, it's strictly pump-and-go.

The Kendas have Presta valves and the hand pump is set up with the
insert for them so it's no problem. I do have one adapter that I keep in
the tool kit attached to a can of that fix-a-flat stuff. (just in case)

--

Bart

David L. Johnson said:

...
No, only if you want to fill up the tires at a gas station. ...

I tend not to do this and warn others not to as well.
The problem with gas-station air hoses is that they get dropped on the
ground a lot and get dirty, and then they blow that dirt into the valve
seal when you use the air hose on your bicycle, and dirt in the seal
will lead to slow leaks. You might not notice that with a car tire at 30
psi, or even a balloon-tire at 35 psi, but it can become obvious with a
1.3" wide bike tire that you want to keep at 100 PSI.

Quoted message said:

They also hold air better at high pressure, ....

I was not aware that this was any problem, at least as far as bicycles
are concerned. There's heavy equipment and aircraft tires with inflation
pressures of 100 to 200+ PSI and their schrader vales seem to hold up
just fine.
~

"nash" <[email hidden]> a écrit:

Quoted message said:

NE one heard of adapters if you use presta tubes. When I got my new
GT MTB they said I had to use adapters. They had none so now I have
schrader again. What is the deal really. My old MTB took them but he
said they can be damaged easily.

Are you talking about adapters to inflate a Presta valve with a Schrader
chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim?

James Thomson

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

Quoted message said:

David L. Johnson said:

...
No, only if you want to fill up the tires at a gas station. ...

I tend not to do this and warn others not to as well.
The problem with gas-station air hoses is that they get dropped on the
ground a lot and get dirty, and then they blow that dirt into the

valve

Quoted message said:

seal when you use the air hose on your bicycle, and dirt in the seal
will lead to slow leaks. You might not notice that with a car tire at

30

Quoted message said:

psi, or even a balloon-tire at 35 psi, but it can become obvious with

a

Quoted message said:

1.3" wide bike tire that you want to keep at 100 PSI.

<snip>

Another issue with air lines at gas stations, compressors create water
condensate plus lubricating oil from the compressor can leak into the
line. Both water and oil can get into your tires.

Chas.

Are you talking about adapters to inflate a Presta valve with a Schrader
chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim?

James Thomson

Yes, that I am sure is what the LBS meant. Like I said it is a mtb and he
told me not to use presta tubes. The screw goes down to the rim on the
outside but he still said that does not cover it. I do not know why.

"* * Chas" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

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

Quoted message said:

David L. Johnson said:

...
No, only if you want to fill up the tires at a gas station. ...

I tend not to do this and warn others not to as well.
The problem with gas-station air hoses is that they get dropped on the
ground a lot and get dirty, and then they blow that dirt into the

valve

Quoted message said:

seal when you use the air hose on your bicycle, and dirt in the seal
will lead to slow leaks. You might not notice that with a car tire at

30

Quoted message said:

psi, or even a balloon-tire at 35 psi, but it can become obvious with

a

Quoted message said:

1.3" wide bike tire that you want to keep at 100 PSI.

<snip>

Another issue with air lines at gas stations, compressors create water
condensate plus lubricating oil from the compressor can leak into the
line. Both water and oil can get into your tires.

Chas.

I agree Chas and it is much smarter to carry your own repair kit and pump.
No long walk to a gas station and finding out the pump does not work anyway.
One summer every gas station in N.Surrey did not have a working pump. Gad!
topeak has a smart head now so presta and shrader are automatic, no changing
set up.
Check pressure before you leave and you will not need a gas station.

On Mon, 30 Oct 2006 17:10:22 GMT, "nash" <[email hidden]>

Quoted message said:

Are you talking about adapters to inflate a Presta valve with a Schrader
chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim?

James Thomson

Yes, that I am sure is what the LBS meant. Like I said it is a mtb and he
told me not to use presta tubes. The screw goes down to the rim on the
outside but he still said that does not cover it. I do not know why.

Dear Nash,

Your particular MTB rim has a slightly larger hole to suit the thicker
Schrader car-style valve.

The Schrader tube will work fine.

If you want to use an inner tube with a thinner Presta valve to suit a
Presta pump, you can buy a fitting from BikeToolsEtc to reduce the
size of the valve hole in your rim:

http://www.biketoolsetc.com/index.cgi?id=745689442538&d=single&c=Tire-Tube&sc=Accessories&tc=Valve-Adaptors&item_id=WB-PSS1
or http://tinyurl.com/y3v4oh

Many hand pumps now come with dual or easily reversible chucks for
both kinds of valves.

Cheers,

Carl Fogel

"nash" <[email hidden]> wrote in message
news:5qq1h.219985$1T2.148176@pd7urf2no...

Quoted message said:

"* * Chas" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

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

Quoted message said:

David L. Johnson wrote:
> ...
> No, only if you want to fill up the tires at a gas station. ...
I tend not to do this and warn others not to as well.
The problem with gas-station air hoses is that they get dropped on

the

Quoted message said:

Quoted message said:

Quoted message said:

ground a lot and get dirty, and then they blow that dirt into the

valve

Quoted message said:

seal when you use the air hose on your bicycle, and dirt in the

seal

Quoted message said:

Quoted message said:

Quoted message said:

will lead to slow leaks. You might not notice that with a car tire

at

Quoted message said:

Quoted message said:

30

Quoted message said:

psi, or even a balloon-tire at 35 psi, but it can become obvious

with

Quoted message said:

Quoted message said:

a

Quoted message said:

1.3" wide bike tire that you want to keep at 100 PSI.

<snip>

Another issue with air lines at gas stations, compressors create

water

Quoted message said:

Quoted message said:

condensate plus lubricating oil from the compressor can leak into

the

Quoted message said:

Quoted message said:

line. Both water and oil can get into your tires.

Chas.

I agree Chas and it is much smarter to carry your own repair kit and

pump.

Quoted message said:

No long walk to a gas station and finding out the pump does not work

anyway.

Quoted message said:

One summer every gas station in N.Surrey did not have a working pump.

Gad!

Quoted message said:

topeak has a smart head now so presta and shrader are automatic, no

changing

Quoted message said:

set up.
Check pressure before you leave and you will not need a gas station.

"the pump don't work, cause the vandals stole the handle" (Bob Dylan)

Chas.

On Mon, 30 Oct 2006 17:10:22 GMT, "nash" <[email hidden]>

Quoted message said:

Quoted message said:

Are you talking about adapters to inflate a Presta valve with a Schrader
chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim?

Yes, that I am sure is what the LBS meant. Like I said it is a mtb and he
told me not to use presta tubes. The screw goes down to the rim on the
outside but he still said that does not cover it. I do not know why.

Although there are collars which can be used to make Prestas work
without risk of the tube failing at its base in this instance, there's
no big advantage in doing so unless your tire pump doesn't have a
chuck that will accommodate a Schrader. On the other hand, if you
have a Presta-only inflation chuck, and the rest of your bikes are
equippd with Presta valves, then the collars work just fine to allow
you to standardize with one valve design. I've even seen people use
two of them, one inside at the base of the valve, and another flipped
over to use under the nut, but that may not be a terrific idea; more
than a few users have reported that they get fewer base-of-valve
failures from their Prestas when they simply leave that nut off.
(There are pros and cons to this, but my attitude is "use what works
for you."😉
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

On Mon, 30 Oct 2006 17:14:41 GMT, "nash" <[email hidden]>

Quoted message said:

Check pressure before you leave and you will not need a gas station.

Assuming nothing goes wrong, like a flat...

--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

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

Quoted message said:

On Mon, 30 Oct 2006 17:14:41 GMT, "nash" <[email hidden]>

Quoted message said:

Check pressure before you leave and you will not need a gas station.

Assuming nothing goes wrong, like a flat...

--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

I am assuming you read the rest of the post that went with it. Take your
own pump you are much better off and will not
have to worry whether a gas station can get you to 100psi or have a working
pump period. they could care less. What is so hard to understand about
that?

* * Chas said:

"the pump don't work, cause the vandals stole the handle" (Bob Dylan)

I think that actually referred to a water pump.

--

David L. Johnson

__o | Some people used to claim that, if enough monkeys sat in front
_`\(,_ | of enough typewriters and typed long enough, eventually one of
(_)/ (_) | them would reproduce the collected works of Shakespeare. The
internet has proven this not to be the case.

Quoted message said:

On Mon, 30 Oct 2006 17:10:22 GMT, "nash" <[email hidden]>

Quoted message said:

Are you talking about adapters to inflate a Presta valve with a Schrader
chuck, or adapter grommets to use a Presta valve in a Schrader-drilled rim?

James Thomson

Yes, that I am sure is what the LBS meant. Like I said it is a mtb and he
told me not to use presta tubes. The screw goes down to the rim on the
outside but he still said that does not cover it. I do not know why.

Dear Nash,

Your particular MTB rim has a slightly larger hole to suit the thicker
Schrader car-style valve.

The Schrader tube will work fine.

If you want to use an inner tube with a thinner Presta valve to suit a
Presta pump, you can buy a fitting from BikeToolsEtc to reduce the
size of the valve hole in your rim:

http://www.biketoolsetc.com/index.cgi?id=745689442538&d=single&c=Tire-Tube&sc=Accessories&tc=Valve-Adaptors&item_id=WB-PSS1
or http://tinyurl.com/y3v4oh

Many hand pumps now come with dual or easily reversible chucks for
both kinds of valves.

Cheers,

Carl Fogel

I routinely use presta tubes in Schrader-drilled rims without grommets.
Never had a problem.

Okay,
I phoned another LBS. He said without the valve tube for stability it is
quite sufficient to keep the outside grommet tight but you have to be
vigilant as it rattles loose all the time. they cost $7/pair if you do not.

thanks again