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Of the 3 types of valves, I like modern Dunlop valves the best. Has the advantages of a presta without the little stem and nut, plus the valve is easier to remove than the other 2.
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Originally Posted by Mark Stone
(Post 18523507)
One thing that may give S[/COLOR]chrader an advantage is for touring. Sometimes a long distance cyclist may need to replace a tube, and KMart/Walmart carries only Schrader. But for city types like myself that's not an issue.
They also sell 700C tires. Not good ones but they are better than Continentals;) |
Our local hardware store has presta tubes.
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Originally Posted by Retro Grouch
(Post 18523224)
Is this a vote, like in Vermont or more like a caucus, like Iowa?
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Originally Posted by cyccommute
(Post 18524181)
That would be incorrect. Walmart (aka Hellmart) sells presta tubes for 700C tires. I've seen them in a number of Hellmarts around the country.
They also sell 700C tires. Not good ones but they are better than Continentals;) |
Originally Posted by Mark Stone
(Post 18524593)
Ouch! I'll let go of my Conti's when they unwrap my cold, dead . . . . well, you know.
I used the Continentals for the rest of my tour but I had to run them at 20 psi lower than the suggested pressure. There's nothing quite like riding squirmy tires for 400 miles. I'll use anything...including the Bells sold at Hellmart which are just awful...over Continentals. |
Originally Posted by cyccommute
(Post 18525081)
If they come in shares, I'll gladly give you mine. I've had far too many Continentals fail me to use them even around town. The straw that really broke the camel's back was 4 blowouts on two tires within the first 26 miles of a 2 week bike tour. One of them occurred within two miles of where I parked my car. The 4th one caused me to thumb a ride back to my car and made me reroute my tour. All of the blowouts occurred on tires that had been pumped to the suggested pressure.
I used the Continentals for the rest of my tour but I had to run them at 20 psi lower than the suggested pressure. There's nothing quite like riding squirmy tires for 400 miles. I'll use anything...including the Bells sold at Hellmart which are just awful...over Continentals. I do not blame you though, if they did to me what they did to you I'd move on. :( |
Originally Posted by GerryinHouston
(Post 18520871)
I've read that you can buy a Presta to Schrader adapter. Can you leave that adapter permanently on the Presta stem (and capping the valve with the Schrader cap?).
A real expert (Jobst Brandt, RIP) weighed in on the Presta advantages in response to a question, from Presta valves (Jobst Brandt) > If anyone can tell me the advantage of Presta, I'd like to know. Two main advantages are the slender profile that doesn't cut as large a hole in the rim, and the lack of a spring that allows easy pumping with a simple pump head (one with no features except a gasket). The slender form is probably the more important feature because the valve hole in the rim describes the minimum cross section and therefore the ultimate strength of the wheel. When the rim yields at the stem hole the wheel fails. If this cross section is small it limits spoke tension that is the essence of wheel strength. A rim may feel heavy and look strong, but if you consider the cross section at the stem hole it loses much of that robust appearance. *Jobst pointed out in the same thread that a world-record attempt at 160mph resulted in a Scrader valve leaking due to centrifugal force on the valve stem. |
I have come to prefer Presta.
But I could go either way. |
Originally Posted by Wilfred Laurier
(Post 18520361)
If you have very narrow rims (which are thankfully becoming rarer even on racing bikes) then presta valves are preferable because the hole is smaller and leaves more of the already minimal material. If you have rims wider than ~13mm, and especially if you don't have high pressure narrow tires, then there is no advantage to presta, and Shchreader is more convenient.
My wife's hybrid bike with 28c tires has Schrader valves. All of my bikes with 25c, 26x1.5 and 26x2.1 have Presta valves, and I prefer them far and away over Schrader. I had a Schrader tube on my wife's bike completely fail once when the entire valve stem pulled out of the tube as I was trying to remove the pump head. In general I find that removing the pump head to be more difficult on Schrader valves than on my Prestas. I don't use the Presta caps that come in the package as those are meant only for packaging to prevent the valve from puncturing the tube in transit. So for me it's easier to just unscrew the Presta valve than it is to unscrew a Schrader valve cap and then have to put it down somewhere or hold it while pumping the tire. I do not like to leave Schrader valves uncapped (on both cars and bikes). I also prefer threaded Presta valves with the retaining nut since it keeps the valve from pushing back into the tire when I'm trying to attach the pump head. Putting the pump head on an empty Schrader tube/tire/rim can be pretty difficult sometimes. |
blondes have more fun but brunettes are more fun
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Originally Posted by PatrickGSR94
(Post 18528949)
Incorrect.
My wife's hybrid bike with 28c tires has Schrader valves. All of my bikes with 25c, 26x1.5 and 26x2.1 have Presta valves, and I prefer them far and away over Schrader. I had a Schrader tube on my wife's bike completely fail once when the entire valve stem pulled out of the tube as I was trying to remove the pump head. In general I find that removing the pump head to be more difficult on Schrader valves than on my Prestas. I don't use the Presta caps that come in the package as those are meant only for packaging to prevent the valve from puncturing the tube in transit. So for me it's easier to just unscrew the Presta valve than it is to unscrew a Schrader valve cap and then have to put it down somewhere or hold it while pumping the tire. I do not like to leave Schrader valves uncapped (on both cars and bikes). I also prefer threaded Presta valves with the retaining nut since it keeps the valve from pushing back into the tire when I'm trying to attach the pump head. Putting the pump head on an empty Schrader tube/tire/rim can be pretty difficult sometimes. |
Now is the schrader or presta and with or without a helmet, and what do you lub your chain with? :)
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