Presta valve caps
#51
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I recently read an article (I don't remember where) that said valve caps are necessary for schrader valves because dirt and dust can foul the mechanism, but caps aren't necessary on presta valves because they seal themselves when screwed down properly. I use caps so the presta valves don't rip my jersey when I fix a flat and take the bad tube home for repair or disposal. I also think it looks better, but that's just me.
#52
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Rule 60. From the good book: https://www.velominati.com/
“Ditch the washer-nut and valve-stem cap.You are not, under any circumstances, to employ the use of the washer-nut and valve-stem cap that come with your inner-tubes or tubulars. They are only supplied to meet shipping regulations. They are useless when it comes to tubes and tires”. Amen
“Ditch the washer-nut and valve-stem cap.You are not, under any circumstances, to employ the use of the washer-nut and valve-stem cap that come with your inner-tubes or tubulars. They are only supplied to meet shipping regulations. They are useless when it comes to tubes and tires”. Amen
#53
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#54
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Nope. The plastic cap won't keep air in the tube; they don't seal tight enough, and if the valve is open, the cap will just push down on it and make it leak faster.
The only use I have for a presta cap is as an emergency shraeder adapter. Cut off the tip, turn it upside down, and screw it on. You can then use a shraeder pump or gas station compressor.
https://www.purecycles.com/blogs/bic...hrader-adapter
The only use I have for a presta cap is as an emergency shraeder adapter. Cut off the tip, turn it upside down, and screw it on. You can then use a shraeder pump or gas station compressor.
https://www.purecycles.com/blogs/bic...hrader-adapter
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I recently read an article (I don't remember where) that said valve caps are necessary for schrader valves because dirt and dust can foul the mechanism, but caps aren't necessary on presta valves because they seal themselves when screwed down properly. I use caps so the presta valves don't rip my jersey when I fix a flat and take the bad tube home for repair or disposal. I also think it looks better, but that's just me.
Now there is possible same situation with the Presta as well, but most people do not use the cap because those valve just don't seem to care as much as Schrader does, like I said earlier if you're going to be in a wet and or muddy environment you should use the presta cap, and the schrader cap. Most roadies don't ride in the rain so most roadies ditch the presta caps, but my touring bike came with Presta valves so on that bike I use the cap, but not on my regular bikes.
#56
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More of a problem is the tire sealant making the valve stick and clogging the pump head.
#57
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I would rather be safe than sorry, and the weight of a cap is so slight I can't even feel the weight in my hand, so I'm not bothered by the weight of it.
#58
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Presta caps a t!ts on a bull. They serve no purpose.
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Yes this is true, Some brands of Prest tube have screw in valves just like Schraders, be sure and check this out before throwing away what is a good tube.
#60
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Personally, I find the presta valve to be a homely little device, so even if the cap isn’t really needed, and it isn’t, my preference is to cover it up.
Tim
Tim
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