Dipesh, It is likely that there is a) Something poking from the outside still embedded in the tire. Or perhaps multiple things (shards of glass, bits of metal, etc) that have been causing flats one by one over time. b) A burr on the rim, a problem with your rim tape, etc going on inside the wheel or c) Chronic underinflation of your tires which would cause one of 2 things: 1) a pinch flat, which would be obvious because it would appear as a snake bite 2) shifting around of tube causing the valve stem to tear or rim tape, etc. resulting in abrasions from the rim to cause a flat in the tube.
I teach flat fixes as part of my job. I have to remind people to find the cause of the flat before replacing or patching their tubes. And even then there are a bunch of ways to introduce a flat while repairing one. It is disheartening but true that one of the most common times to get a flat is just after fixing a flat. It is not impossible that all this has been a run of bad luck. Tubes don't come with any guarantee of puncture-resistance, and if your son rides on streets that have lots of debris this may be the unfortunate cause of the flats. Good luck. -india On Wed, Apr 24, 2013 at 2:23 PM, Dipesh Navsaria <[email protected]>wrote: > Good afternoon. Wondering if folx had any advice on a situation of > repeating flats on my 10-year-old son's bicycle. We bought a new Trek 7.1 > for him last year (outgrew previous bike). About a week or two after > purchase, he had a flat on the rear tire. We took it back to Budget, the > mechanics looked it over and replaced the tube. Another week…another flat. > This happened four times last fall, all in the space of about 2-2.5 > months. Keep in mind he was riding it about 10 miles once a week, maybe a > shorter distance on the weekend once, but certainly nothing major. The > third/fourth time, I pointed out how frequently it was happening -- they > looked over the wheel and all, but didn't see anything obvious. I'm trying > to remember if they changed out the tyre itself -- I think they did. A > couple of times they found a small piece of metal or the like that got > embedded in there. > > Today, after the winter, we were getting ready to go to school. He hasn't > ridden this bike all winter until the last week or two, both times just a > few blocks. Guess what? Rear tyre, flat. (i.e. you pump it up and you > can hear hissing.) > > Each time, the Budget mechanics (who have always done right by me on the > many other things I've brought them -- virtually never had a problem) have > chalked it up to a run of bad luck. Still: we never had a flat on his bike > previously (granted, they were kid "mountain bikes" with thicker tires, but > these aren't exactly racing slicks), and it's always the rear wheel. He > doesn't ride his bike particularly "rough", and if there's roadside debris > he's biking through…I'm usually with him and biking through the same stuff, > without any issues. > > I'm considering contacting the owner (anyone have an e-mail address for > Roger Charly?) this time, but before I do -- any thoughts about what could > be causing this? Five flats with only 1-2 weeks of effective cycling since > the previous flat, all on the same wheel? That sounds statistically > improbable. And I'm getting sick of this… > > Would appreciate any advice or thoughts. Thanks! > > Peace and Prosperity, > Dipesh > _______________________________________________ > Bikies mailing list > [email protected] > http://lists.danenet.org/listinfo.cgi/bikies-danenet.org > -- WeAreAllMechanics.com [email protected] Stay connected- Follow WAAM on Facebook<http://www.facebook.com/We.Are.All.Mechanics>
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