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Old 09-07-2010, 02:47 PM   #11
udman
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Hey Lee, just use the tube that fits your rims. Those little grommets and adapters actually can cause pinching especially if your rims have a "v" in them.
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Old 09-07-2010, 02:49 PM   #12
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That's weird. I've used presta exclusively for about 15 years and never had a leaky stem. Are these budget tubes or something?

I guess all my rims have been drilled for presta, so maybe it's the grommet that's causing problems. I usually keep the nut on the stem cinched down pretty tight, and maybe yours are moving around when you ride and causing problems.
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Old 09-07-2010, 02:51 PM   #13
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Originally Posted by anthonyk View Post
That's weird. I've used presta exclusively for about 15 years and never had a leaky stem. Are these budget tubes or something?

I guess all my rims have been drilled for presta, so maybe it's the grommet that's causing problems. I usually keep the nut on the stem cinched down pretty tight, and maybe yours are moving around when you ride and causing problems.
I believe the last two were seamless Continental tubes.
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Old 09-07-2010, 03:29 PM   #14
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Do you realize you could have Googled it and gotten the answer in much shorter time than it took you to reply?
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Old 09-07-2010, 03:36 PM   #15
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Originally Posted by anthonyk View Post
That's weird. I've used presta exclusively for about 15 years and never had a leaky stem.
Same here. Been using them forever and haven't had any issues with them at all.





Castor - what does your buddy do when he gets a flat on the trail? Expects others to fill up his tires for him? I stopped to help a couple cute girls air up their tires on the trail this weekend, so there is another upside to carrying your own pump that fits
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Old 09-07-2010, 03:49 PM   #16
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I've found that presta valves are more durable when mountain biking and I find that it's easier to fill the tube with presta valves.

Some people have told me there is "weight savings" when using the presta valves but I would think that's negligible.
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Old 09-07-2010, 03:51 PM   #17
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I haven't noticed any difference in the amount of time to pump them vs. te Schraeders on my wife's bike (same pump - it has connections for both valve types).
Not amount of time, but amount of force necessary. With Schraeder, the valve spring is stiffer.
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Old 09-07-2010, 04:05 PM   #18
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Castor - what does your buddy do when he gets a flat on the trail?

So far neither of us have had a flat on the trail...but thankfully the trail we typically ride is a greenway around a lake with LOTS of riders...so SOMEBODY will have one (I hope ) otherwise....he'll be sitting there while I ride 7 miles back to the truck
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Old 09-07-2010, 04:08 PM   #19
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Oh, so you don't have a pump either? lol

I won't leave the garage without tools, extra tubes, and a pump. I've had flat tires riding a paved bike path. They can happen anywhere, ya know.
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Old 09-07-2010, 04:09 PM   #20
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Originally Posted by CasterTroy View Post
My neighbor has those Presta Valves on his MTB

He's ALWAYS complaining about them.....I can't see the benefit personally....but I'm not one to ride a umteen thousand dollar MTB.

Irony is he's too cheap to buy the $40 pump to air them up himself...so when he has to air up, we have to swing by the bike shop before the trails
That's retarded... buy the $1 adapter and carry it with you every time you bike...

Quote:
Originally Posted by anthonyk View Post
That's weird. I've used presta exclusively for about 15 years and never had a leaky stem. Are these budget tubes or something?

I guess all my rims have been drilled for presta, so maybe it's the grommet that's causing problems. I usually keep the nut on the stem cinched down pretty tight, and maybe yours are moving around when you ride and causing problems.
Me too... never any issue. As I think udman said, you're rims probably aren't designed for presta valves.
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