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#1
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Change Air In Tires
8-)
With all the talk of greenhouse gases I am concerned with having tired air in my bike tubes. How long can I can go between evacuating the air and putting new air in? I am afraid that the air molecules will all be pushed to the outer edge of the tire if I do not evacuate the tubes on a regular basis. This could cause the tire to put too much weight on the road and thus I am not be able to get at top speed quickly. Does tapping on the tread move the molecules back into the center of the tube? 9-) ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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#2
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"Rick Ankrum" wrote: (clip) Does tapping on the tread move the molecules back into the center of the tube? ^^^^^^^^^^^^^^^^^^^ If you ride on rough pavement occasionally, that is equivalent to tapping on the tread--maybe even better--so you should have nothing to worry about. |
#3
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Leo Lichtman wrote:
If you ride on rough pavement occasionally, that is equivalent to tapping on the tread--maybe even better--so you should have nothing to worry about. I would think the centripetal force of the rotating tire might overcome any "jostling" of the molecules that comes from riding on rough pavement. Is Jobst available to do an engineering analysis of this important problem? RFM |
#4
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"Fritz M" wrote: I would think the centripetal force of the rotating tire might overcome any "jostling" of the molecules that comes from riding on rough pavement. (clip) ^^^^^^^^^^^^^^^ There could be some effect of centripetal force (or centrifugal force, depending on how "sophisticated" you want to sound,) but please bear in mind that the portion of the tire at the bottom, where the jostling is taking place is STATIONARY. There must be some degree of roughness at which the rotational forces equal the mixing forces. For higher roughness, the air would remain mixed, and for lower roughness, segregation would progress. |
#5
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Rick Ankrum wrote:
8-) With all the talk of greenhouse gases I am concerned with having tired air in my bike tubes. How long can I can go between evacuating the air and putting new air in? I am afraid that the air molecules will all be pushed to the outer edge of the tire if I do not evacuate the tubes on a regular basis. This could cause the tire to put too much weight on the road and thus I am not be able to get at top speed quickly. Does tapping on the tread move the molecules back into the center of the tube? No, because of moisture (condensation). I rigged up a "talcum injection system" to my floor pump to prevent this very problem. No more bits of air stuck to the inside of MY tubes, TYVM. (I'm working on a portable version for those roadside flats; also keeps one's pits baby fresh.) Bill "clean 'n dry" S. |
#6
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"Rick Ankrum" wrote in message ... 8-) With all the talk of greenhouse gases I am concerned with having tired air in my bike tubes. How long can I can go between evacuating the air and putting new air in? I am afraid that the air molecules will all be pushed to the outer edge of the tire if I do not evacuate the tubes on a regular basis. This could cause the tire to put too much weight on the road and thus I am not be able to get at top speed quickly. Does tapping on the tread move the molecules back into the center of the tube? This is the very reason why I use tubeless tires. |
#7
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"Rick Ankrum" wrote in message ... 8-) With all the talk of greenhouse gases I am concerned with having tired air in my bike tubes. How long can I can go between evacuating the air and putting new air in? I am afraid that the air molecules will all be pushed to the outer edge of the tire if I do not evacuate the tubes on a regular basis. This could cause the tire to put too much weight on the road and thus I am not be able to get at top speed quickly. One thing to remember when changing the air in your tires. When all the molecules are pushed to the outer edge of the tire, it doesn't do any good to let the air out of the valve stem because there is no air there. You must poke a hole in the tire to get it all out. |
#8
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di wrote:
"Rick Ankrum" wrote in message ... 8-) With all the talk of greenhouse gases I am concerned with having tired air in my bike tubes. How long can I can go between evacuating the air and putting new air in? I am afraid that the air molecules will all be pushed to the outer edge of the tire if I do not evacuate the tubes on a regular basis. This could cause the tire to put too much weight on the road and thus I am not be able to get at top speed quickly. Does tapping on the tread move the molecules back into the center of the tube? This is the very reason why I use tubeless tires. Poor deluded innocent. They use air, too, you know. Bill "PS: it's 'tubless' in Usenet" S. {sarcams mode off} |
#9
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"Bill Sornson" wrote in message ... di wrote: "Rick Ankrum" wrote in message ... 8-) With all the talk of greenhouse gases I am concerned with having tired air in my bike tubes. How long can I can go between evacuating the air and putting new air in? I am afraid that the air molecules will all be pushed to the outer edge of the tire if I do not evacuate the tubes on a regular basis. This could cause the tire to put too much weight on the road and thus I am not be able to get at top speed quickly. Does tapping on the tread move the molecules back into the center of the tube? This is the very reason why I use tubeless tires. Poor deluded innocent. They use air, too, you know. Bill "PS: it's 'tubless' in Usenet" S. {sarcams mode off} yea, but there some unknown factor that keeps the air molecules in motion eliminating them from gathering on the outside of the tire or is it tyre on the Usenet. My spell checker is not Usenet savvy, it says tubeless, must return it to Microsoft for updates someday. |
#10
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Leo Lichtman wrote:
"Fritz M" wrote: I would think the centripetal force of the rotating tire might overcome any "jostling" of the molecules that comes from riding on rough pavement. (clip) ^^^^^^^^^^^^^^^ There could be some effect of centripetal force (or centrifugal force, depending on how "sophisticated" you want to sound,) but please bear in mind that the portion of the tire at the bottom, where the jostling is taking place is STATIONARY. There must be some degree of roughness at which the rotational forces equal the mixing forces. For higher roughness, the air would remain mixed, and for lower roughness, segregation would progress. Are you saying my miles on the trainer(with a smooth roller) would extend the time period between air evacuation events? ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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