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Flats

Old 03-12-17, 05:08 PM
  #1  
gringomojado
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Flats

I get more flats on cloudy/or rainy days than when it is sunny. Does atmospheric pressure come into play here?
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Old 03-12-17, 05:15 PM
  #2  
Sy Reene
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Yes, there are more cloudy and rainy days per year, than there are sunny..
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Old 03-12-17, 05:43 PM
  #3  
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I almost never flat on cloudy or rainy days, but I live in Tucson.
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Old 03-15-17, 12:34 PM
  #4  
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I think wet tires are more likely to pick stuff up cuz they are sticky
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Old 03-15-17, 05:41 PM
  #5  
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Harder to see the stuff you shouldn't run over when the sun is hidden?

What's your "n", BTW.
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Old 03-15-17, 06:47 PM
  #6  
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Not unless your tires are made from my knees and joints.

Even with dozens of flats over the years I haven't noticed any particular connection with weather, other than dry summers and falls resulting in grass burrs and goat heads that are hard as tacks and nails. Most of my flats occur in dry weather.

Besides grass burrs, most are from razor thin shards of glass and construction debris -- staples, nails, drywall screws, stuff that would cause punctures regardless of conditions.

The one I've had in rain during the past year would have occurred regardless, just a shard of glass shaped perfectly to cause a puncture no matter how it was oriented, and it occurred just as a misting rain began. Coincidence.

If anything my tires are cleaner after a rain and puddles, with less debris trapped in the sipes where it's more likely to puncture the tire and tube.

Last edited by canklecat; 03-15-17 at 06:53 PM.
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Old 03-16-17, 07:24 PM
  #7  
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Flats are caused by acid in the rain, not barometric pressure.
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Old 03-16-17, 07:43 PM
  #8  
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Ride when it's sunny & never worry about flats again. 😎
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Old 03-16-17, 08:07 PM
  #9  
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Originally Posted by LiquorLad View Post
Ride when it's sunny & never worry about flats again. 😎
I wish that worked for me.
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Old 03-16-17, 08:24 PM
  #10  
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No.
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Old 03-16-17, 08:38 PM
  #11  
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Originally Posted by gringomojado View Post
I get more flats on cloudy/or rainy days than when it is sunny. Does atmospheric pressure come into play here?
Yes, that's right, it's the bariatric pressure.
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Old 03-17-17, 06:59 AM
  #12  
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Originally Posted by JanMM View Post
Yes, that's right, it's the bariatric pressure.
Don't they put that in the enema before they x-ray you?
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Old 03-17-17, 07:24 AM
  #13  
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I think to water flow moves more junk into the riders path = higher chance for flats...
I have to admit I am a fair weather biker and golfer, but I love a thunderstorm!!
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Old 03-17-17, 09:01 AM
  #14  
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Originally Posted by sjstretch View Post
I think to water flow moves more junk into the riders path = higher chance for flats...
This.

Rain moves materials like thorns, tiny shards of glass, and small pieces of metal/wire around on the road increasing your chances of running over flat inducing material. In our area, where we may experience many days or weeks without rain it's especially noticeable. At the shop we always experience a discernible increase in customers with flats after a good rain.
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Old 03-17-17, 11:16 AM
  #15  
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In my experiences, weather never made a difference for me when it came to a flat. The only things I am aware of that can contribute to a flat is
1. Low quality tire (or tire with low amount of tread and has the tiny cracking)
2. New rim tape needed (spoke pokes through and overtime causes a flat)
3. Faulty (really rare but still apparently happens).
4. Tires not being inflated to proper pressure (too much or too little is one of the main reasons people get flats)

I ride gator skins and make sure every ride that I have the right pressure, sure they may not be the comfiest ride compared to grand prix 4000's which I had before, but it's worth it to only a get flat once or twice out of the year
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Old 03-19-17, 03:17 PM
  #16  
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Originally Posted by gringomojado View Post
I get more flats on cloudy/or rainy days than when it is sunny. Does atmospheric pressure come into play here?
A theory I've read, but can't verify, is that water will hold things to the tire for a couple of revolutions so they get hammered in rather than spinning off, then once they start to penetrate, it lubricates them so they slip in easily instead of hanging up in the rubber and grinding or breaking off.
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Old 03-19-17, 03:18 PM
  #17  
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Originally Posted by Bikedud View Post
This.

Rain moves materials like thorns, tiny shards of glass, and small pieces of metal/wire around on the road increasing your chances of running over flat inducing material. In our area, where we may experience many days or weeks without rain it's especially noticeable. At the shop we always experience a discernible increase in customers with flats after a good rain.
Why would water move things into your path rather than away from it?
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Old 03-20-17, 08:22 AM
  #18  
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Originally Posted by Velo Dog View Post
Why would water move things into your path rather than away from it?
Might be increased surface tension, might be movement of particles by the water, might be invisible demons deployed by bicycle tire manufacturers that move all potentially puncturing debris into a cyclist path. Don't have any scientific evidence or studies to support my comment, just 30+ years of anecdotal evidence and experience including hundreds of conversations with many bearded sages who pass knowledge(?) on to me. You are free to be an unbeliever.

As stated in my original comment, this I do know- At the shop, we experience a noticeable, measurable (more than 3x) increase in flat tire repairs after rain. I/we spend an inordinate amount of time removing tiny pieces of wire/metal and tiny shards of glass from punctured tires.This occurs with both casual cyclist and hard core enthusiast.
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Old 03-20-17, 08:37 AM
  #19  
Scarbo
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I only get flats when Mercury is in retrograde.
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