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Old 06-27-10, 10:01 AM
  #24  
qmsdc15
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Join Date: Mar 2004
Location: Maryland
Posts: 5,155

Bikes: rockhopper, delta V, cannondale H300, Marin Mill Valley

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A hole caused by a spoke or the exposed edge of a spoke hole can be patched. You might get home before it starts leaking. It's something about the shape of the patch being pulled and pushed at the same time in a sort of potato chip shape. I've had close to 100% success with patches on the outer diameter of the tire and 0% long term repair with inside diameter patches. I have probably patched more tubes than anyone here. My patching technique maybe deficient, but it's better than most.

I don't retire a tube until it have seven patches and needs an eighth. My patches improve the strength and air retention of an innertube but add to it's weight. It's a rare problem that can can cause a puncture on the inside diameter, but I have tried to repair tubes like that a number of times and it does not work.

I would recommend against counting on the dependability of a tube patched on the inside. You can learn from my experience or ignore it.
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