Bike Tube Pinhole

Bike tube pinhole defect

Bike tube pinhole defect

Went to roll the bike out of the garage and the rear tire was dead flat. You don’t even need to look at the tire, you just instantly know something’s wrong: the bike feels funny with a flat tire.

The picture shows the problem: a pinhole in the tube. Nothing penetrated the tire, nothing went wrong with the tire liner (you can see this was a few mm from the edge, so it’s not an abrasion flat), there are no problems anywhere. Just a tiny hole in the tube.

As nearly as I can tell, the tube simply failed at that point, without any external aggravation.

Popped in another tube and it’s all good, but … I guess it’s time to buy some new tubes: the new one came from a box dated May 90.

Finding a flat in the garage is much much better than finding a flat on the road.

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  1. #1 by randomdreams on 11-April-2010 - 00:47

    You get a *lot* more time out of your tubes than I do: mine rarely last 6 months (and I don’t retire, so to speak, a tube until it has 6 patches.) The idea of 20-year-old tubes still new in box is a little boggling.

    I hope you still got a ride in!

    • #2 by Ed on 11-April-2010 - 17:53

      20-year-old tubes still new in box is a little boggling

      That’s certainly not the standard behavior around here: they sort of got lost in the back of the box!

      The things do go bad on the shelf. It seemed stretchy and smooth enough, so perhaps the rubber will last for the rest of the year.

      I do not expect the new Schwalbes to sit around quite that long…