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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 06-08-09, 01:48 PM   #1
Cycho 
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What happened to my tire?

I took my brand new road bike out for a ride on Sunday and while descending a hill at 38.5 mph, I hit a pot hole (not a huge one) in the asphalt. The CF fork soaked it up pretty well and my front wheel/tire was fine but the back tire immediately lost all pressure. The bike started to fish tail and I'm glad I didn't wipe out. The wheel looks fine, no broken spokes, and no obvious punctures in the rubber. When I returned home, I started to re-inflate the tire with a floor pump and it looks like it was taking the air. Should I remove the wheel and do a more thorough inspection of the wheel and the tube?
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Old 06-08-09, 01:57 PM   #2
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Yes. I'd rather take 10-15 minutes and check everything rather than leaving it be and going 40mph again.
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Old 06-08-09, 02:00 PM   #3
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ya it lost air it will lose it again. it is sealed by the tire casing.

pull tube out 100%,
and inflate it by itself and check for leaks
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Old 06-08-09, 02:22 PM   #4
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Sounds like you might have gotten a pinch flat.

Take out your tube and inflate it (you can use a bathtub of cold water for a 'bubble test') to look for holes. If you find a hole, patch it or replace. Then in the future make sure you keep your road bike tires inflated over 100psi.
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Old 06-08-09, 03:21 PM   #5
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Next time you ride take a spare tube and an inflator, so you dont have to wait till you get home before you can ride again. Check that the rim sidewalls are still an even distance apart.
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