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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 08-05-08, 07:24 PM   #1
HarryMan
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Tire Inflation Problems

My 27x1 wheels have presto valves. I used a schrader adapter and then my new portable bicycle pump but I can't seem to get the pressure up enough in the tire. It is rated for 100psi. I am bottoming out on bumps. I know this is not acceptable but I don't know how to get the pressure any higher.
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Old 08-05-08, 07:51 PM   #2
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I've seen presta adapters not fit tightly enough into inexpensive shraeder pumps.

You would probably do well to buy a good floor pump, Topeak or Blackburn, etc, that has a shraeder/presta head. I've seen decent ones from $40US, certainly no more than $50.

Portable pumps... I'm assuming you mean a frame or pocket hand pump... will fill that tire, but it could take a while. They work best in a getcha home kind of way...
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Old 08-06-08, 07:57 AM   #3
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buy a floor pump. I got a $30 "tech force" (i think?) from the bike shop when I bought my road bike. Goes to 120 EASY...i only pump to 115/110 though. Well worth it.
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Old 08-06-08, 02:47 PM   #4
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Thanks. I bought a floor pump with a gauge today. It should do the trick.
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Old 08-07-08, 10:06 AM   #5
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I replaced my tires and tubes and then inflated them to the 90 psi. No wonder I was bottoming out. My old tires weren't nearly this tight. I was probably only getting to 45 or 50 with the small hand held pump. Thanks for all the advice.
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