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#21
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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.Â* 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
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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
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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
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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
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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
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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
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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
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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
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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
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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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