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Presta valve in a rim that was drilled for Schrader?



 
 
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  #21  
Old September 10th 19, 01:12 AM posted to rec.bicycles.tech
Frank Krygowski[_4_]
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Posts: 7,598
Default Presta valve in a rim that was drilled for Schrader?

On 9/9/2019 7:44 PM, Joerg wrote:
On 2019-09-09 15:16, Frank Krygowski wrote:
On 9/9/2019 1:33 PM, Joerg wrote:
On 2019-09-09 08:15, Tanguy Ortolo wrote:
Chalo, 2019-09-09 08:21+0200:
I can't imagine what your objection could be, given that Presta
valves are inferior in every single possible way to Schraeder
valves, except for their diameter.¬* Count your blessings and use a
better, less fault-prone tube.

I cannot agree with that. The small diameter of Presta valves is one
significant advantage, ...


Yes, less compromise in the integrity and sturdiness of the rim.


Does anyone have an incident where a valve hole caused a failure in a
rim?

A bike rim is in compression. Other stresses are small, unless one hits
a heck of a bump.


Which one occasionally does after passing a sign "Pavement Ends" or when
it's California roads which often look worse than Romanian roads.
Potholes galore.


So on those surfaces, how many rims have you seen that failed because of
the valve hole?


--
- Frank Krygowski
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  #22  
Old September 10th 19, 01:18 AM posted to rec.bicycles.tech
jOHN b.
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Posts: 824
Default Presta valve in a rim that was drilled for Schrader?

On Mon, 09 Sep 2019 16:42:12 -0700, Joerg
wrote:

On 2019-09-09 15:36, John B. wrote:
On Mon, 09 Sep 2019 07:24:22 -0700, Joerg
wrote:

On 2019-09-08 23:21, Chalo wrote:
Joerg wrote:

Just received a new rear wheel. Despite being 700c and for narrow
tires the rim is drilled for a Schrader valve. Couldn't believe it.
Harumph, grumble. Why on earth ... well, it is what it is.

I can't imagine what your objection could be, given that Presta
valves are inferior in every single possible way to Schraeder valves,
except for their diameter. Count your blessings and use a better,
less fault-prone tube.

It confounds me to come up with a rational explanation for why the
recent crop of big wide rims (including fatbike rims) are mostly
drilled for Presta valves.


It's most likely because of standardization. Many small portable pumps
cannot or can only with difficulty be converted to Schrader.

Doesn't matter to me because I never had a valve failure with either
Schrader or Presta. Rummaging around and cleaning the garage in a few
spare minutes yesterday I would a mushroom-shaped furniture panel
connector made from hollow aluminum. Should be easy to make a nice
adapter plug from that and rivet it into the hole. I just have to find a
suitable glue to hold it in place. The E6000 I ordered for another
purpose (shoe repair) is still more than a week off.


Other than holding the adapter in place when changing a tire there is
no need to glue it in place as the valve stem will hold it in place
quite satisfactorily.



That's the main reason, not losing it when changing a tire. It's so easy
to forget about that little thing and then I may have to make a new one.

I might be able to widen the outside a bit with a punch which would also
hold it in place. Sort of a poor man's riveting job.


That is more or less what I did. I swedged a flare on one end of a
short piece of aluminum tubing stuck it in the hole and flared the
outer end just a bit.

Given the comparative amounts of time that the tire is inflated and
being changed it seems like overkill now :-)
--
cheers,

John B.

  #23  
Old September 10th 19, 01:19 AM posted to rec.bicycles.tech
jOHN b.
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Posts: 824
Default Presta valve in a rim that was drilled for Schrader?

On Mon, 09 Sep 2019 16:44:27 -0700, Joerg
wrote:

On 2019-09-09 15:16, Frank Krygowski wrote:
On 9/9/2019 1:33 PM, Joerg wrote:
On 2019-09-09 08:15, Tanguy Ortolo wrote:
Chalo, 2019-09-09 08:21+0200:
I can't imagine what your objection could be, given that Presta
valves are inferior in every single possible way to Schraeder
valves, except for their diameter. Count your blessings and use a
better, less fault-prone tube.

I cannot agree with that. The small diameter of Presta valves is one
significant advantage, ...


Yes, less compromise in the integrity and sturdiness of the rim.


Does anyone have an incident where a valve hole caused a failure in a rim?

A bike rim is in compression. Other stresses are small, unless one hits
a heck of a bump.


Which one occasionally does after passing a sign "Pavement Ends" or when
it's California roads which often look worse than Romanian roads.
Potholes galore.


Well, given that I read here about road bikes, gravel bikes, touring
bikes and even mountain bikes the solution would seem to be to buy a
pothole bike :-)
--
cheers,

John B.

  #24  
Old September 10th 19, 02:39 AM posted to rec.bicycles.tech
AMuzi
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Posts: 10,700
Default Presta valve in a rim that was drilled for Schrader?

On 9/9/2019 5:16 PM, Frank Krygowski wrote:
On 9/9/2019 1:33 PM, Joerg wrote:
On 2019-09-09 08:15, Tanguy Ortolo wrote:
Chalo, 2019-09-09 08:21+0200:
I can't imagine what your objection could be, given that
Presta valves are inferior in every single possible way
to Schraeder valves, except for their diameter.¬ Count
your blessings and use a better, less fault-prone tube.

I cannot agree with that. The small diameter of Presta
valves is one
significant advantage, ...



Yes, less compromise in the integrity and sturdiness of
the rim.


Does anyone have an incident where a valve hole caused a
failure in a rim?

A bike rim is in compression. Other stresses are small,
unless one hits a heck of a bump.


Correct.
The only rare cases of creases or cracks at the valve hole
are from extreme side loads in which the rim failed at any rate.

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


  #25  
Old September 10th 19, 06:20 AM posted to rec.bicycles.tech
Tosspot[_3_]
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Posts: 1,338
Default Presta valve in a rim that was drilled for Schrader?

On 07/09/2019 00:30, Joerg wrote:
Just received a new rear wheel. Despite being 700c and for narrow
tires the rim is drilled for a Schrader valve. Couldn't believe it.
Harumph, grumble. Why on earth ... well, it is what it is.

I don't want to wait for some fancy adapter but I do not mind making
just about anything in the garage with hand tools. My special thick
tubes have Presta valves.

What should I use? Piece of plastic? Aluminum? Glue it in place?
Anything needed on the outside except maybe a washer?


In the short term forget it, nothing will happen. In the long term I
would order an adapter up. Which brings me to these;

https://i.stack.imgur.com/m5vqB.jpg

Does anyone know where to order some, I just can't find them! They are
my preferred adapter, and come with, I think, Schwalbe tubes.
  #26  
Old September 10th 19, 07:32 AM posted to rec.bicycles.tech
[email protected]
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Posts: 468
Default Presta valve in a rim that was drilled for Schrader?

On Tuesday, September 10, 2019 at 7:20:36 AM UTC+2, Tosspot wrote:
On 07/09/2019 00:30, Joerg wrote:
Just received a new rear wheel. Despite being 700c and for narrow
tires the rim is drilled for a Schrader valve. Couldn't believe it.
Harumph, grumble. Why on earth ... well, it is what it is.

I don't want to wait for some fancy adapter but I do not mind making
just about anything in the garage with hand tools. My special thick
tubes have Presta valves.

What should I use? Piece of plastic? Aluminum? Glue it in place?
Anything needed on the outside except maybe a washer?


In the short term forget it, nothing will happen. In the long term I
would order an adapter up. Which brings me to these;

https://i.stack.imgur.com/m5vqB.jpg

Does anyone know where to order some, I just can't find them! They are
my preferred adapter, and come with, I think, Schwalbe tubes.


I have a drawer full of them ;-) Indeed from Schwalbe tubes, so just buy a Schwalbe tube.

Lou
  #27  
Old September 10th 19, 09:26 AM posted to rec.bicycles.tech
Tanguy Ortolo
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Posts: 49
Default Presta valve in a rim that was drilled for Schrader?

Joerg, 2019-09-09 20:38+0200:
When you move from one country or continent to another there is always
something you'll sorely miss. Works in both directions. For example, try
to find really good bacon in Europe.


Try /ventrèche/: https://fr.wikipedia.org/wiki/Ventr%C3%A8che_(porc).
It is quite hard to find anyway, even here.

--
Tanguy
  #28  
Old September 10th 19, 04:18 PM posted to rec.bicycles.tech
[email protected]
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Posts: 22
Default Presta valve in a rim that was drilled for Schrader?

On Friday, September 6, 2019 at 6:30:40 PM UTC-4, Joerg wrote:
Just received a new rear wheel. Despite being 700c and for narrow tires
the rim is drilled for a Schrader valve. Couldn't believe it. Harumph,
grumble. Why on earth ... well, it is what it is.

I don't want to wait for some fancy adapter but I do not mind making
just about anything in the garage with hand tools. My special thick
tubes have Presta valves.

What should I use? Piece of plastic? Aluminum? Glue it in place?
Anything needed on the outside except maybe a washer?

--
Regards, Joerg

http://www.analogconsultants.com/


Speaking from experience with this:

Jeff Liebermans comment about using a washer to prevent extrusion is a must, However,also a must is to make sure use tubes with a threaded shaft and use the retaining nut. Otherwise, even with a washer, the tube will shift and end up being slanted in the hole.
  #29  
Old September 10th 19, 04:19 PM posted to rec.bicycles.tech
[email protected]
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Posts: 22
Default Presta valve in a rim that was drilled for Schrader?

On Saturday, September 7, 2019 at 12:27:25 PM UTC-4, Jeff Liebermann wrote:

The only time I really worry about something is when the experts tell
me not to worry.


Words to live by
  #30  
Old September 10th 19, 04:34 PM posted to rec.bicycles.tech
Jeff Liebermann
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Posts: 3,095
Default Presta valve in a rim that was drilled for Schrader?

On Tue, 10 Sep 2019 07:20:33 +0200, Tosspot
wrote:

https://i.stack.imgur.com/m5vqB.jpg

Does anyone know where to order some, I just can't find them! They are
my preferred adapter, and come with, I think, Schwalbe tubes.


Search for "Panaracer Valve Nut"
https://www.ebay.com/sch/i.html?_nkw=Panaracer+Valve+Nut
Prices seem to vary from $1/ea to $7/ea.
This one seems the cheapest:
https://www.ebay.com/itm/283609172914

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 




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