can presta valves be removed like schrader valves? i have a tool to tighten my schrader valves with my road bikes's on the road repair tools in case they loosten & leak air, & i would like to get such a tool for my other bike that has presta valves.
Cycling Equipment · Public discussion
presta valve removers
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- Cycling Equipment
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- 10 August 2005
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- 10 August 2005
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- saturnsc2
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Some Presta valves have removable cores, you can tell by the flat sides near the end of the valve. but mostly they don't. Generally the only tightening they need is screwing down the small threaded bit on the stem. Also Presta valves are held closed by the air pressure inside so they don't leak anyway.
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eric_the_red said:
Some Presta valves have removable cores, you can tell by the flat sides near the end of the valve. but mostly they don't. Generally the only tightening they need is screwing down the small threaded bit on the stem. Also Presta valves are held closed by the air pressure inside so they don't leak anyway.
are presta valves able to withstand more air pressure than schrader valves?
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saturnsc2 said:
are presta valves able to withstand more air pressure than schrader valves?
No, they really don't handle higher pressure than Schrader valves... but at least they are easier to fill due to not having a spring inside like Schrader valves. Air pressure holds them shut/open. It is best to "burp" them by "unscrewing the retaining knurled nut and unseating the stem" before inflating. Otherwise your pump will need to overcome the resistance of the internally seated valve before any air will enter the tube.
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