Finding slow leak
#1
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Joined: Apr 2010
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Finding slow leak
The 26X2.00" front on an 820 is going flat. I was much surprised how easy it was to take off of the rim versus my 1200's 23cX700c.
I found a few small stickers in the tread but doubt it would have done it,looked over the slightly inflated tube, and checked the tightness of the valve core. All seem fine.
Tube is Chinese Kenda. Can it be fixed? I dont care much for patching because the patch cant seat cleanly/flat since there are lines of molding on the tube.
Guess this post is a waste of space since I will hit up LBS or Walton mart, but wanted to try this patching fix in order to ride before I can purchase a new one.
Thanks all, great stuff, cool bros
I found a few small stickers in the tread but doubt it would have done it,looked over the slightly inflated tube, and checked the tightness of the valve core. All seem fine.
Tube is Chinese Kenda. Can it be fixed? I dont care much for patching because the patch cant seat cleanly/flat since there are lines of molding on the tube.
Guess this post is a waste of space since I will hit up LBS or Walton mart, but wanted to try this patching fix in order to ride before I can purchase a new one.
Thanks all, great stuff, cool bros
#3
Engineer
Joined: May 2010
Posts: 591
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From: Bucharest, Romania, Europe
Bikes: 1989 Krapf (with Dura-ace) road bike, 1973 Sputnik (made by XB3) road bike , 1961 Peugeot fixed gear, 2010 Trek 4400
Fill the tub with water submerge the inflated tube (inflated more, like twice it's uninflated size), and check carefully each section holding it submerged.
If it's not observable, then place some sticks and a heavy object to submerge the whole tube and watch closely as the water is very still. Also look for small bubbles of air forming on the surface of the tube. Wipe them off while submerged and see if they reappear (those bubbles maybe is the air trapped in dust particles on the surface of the tube while you submerged it, so wiping them will ensure that is coming from inside the tube).. that is porosity of the tube.
If you have porosity, replace the tube, if the valve is leaking replace the core or tube, if valve-tube seam is leaking replace tube. If a tiny hole is found, patch it.
If it's not visible any air whatsoever, and still deflates change it anyway, but i doubt it leaks any significant amount over usable time.. a tire that deflates in a month or two is not so bad.
If it's not observable, then place some sticks and a heavy object to submerge the whole tube and watch closely as the water is very still. Also look for small bubbles of air forming on the surface of the tube. Wipe them off while submerged and see if they reappear (those bubbles maybe is the air trapped in dust particles on the surface of the tube while you submerged it, so wiping them will ensure that is coming from inside the tube).. that is porosity of the tube.
If you have porosity, replace the tube, if the valve is leaking replace the core or tube, if valve-tube seam is leaking replace tube. If a tiny hole is found, patch it.
If it's not visible any air whatsoever, and still deflates change it anyway, but i doubt it leaks any significant amount over usable time.. a tire that deflates in a month or two is not so bad.
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UMassAm
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11-18-12 11:17 PM






