MTB rims that suit ONLY Presta valves? -
- Dragster1
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Re: MTB rims that suit ONLY Presta valves? -
Postby Dragster1 » Mon Aug 12, 2013 4:41 pm
Whereas Schrader valves are almost universal on car tyres, bicycle tubes have Dunlop, Schrader or Presta valves. Both the Schrader and the Presta types are good at sealing high pressures. Their chief differences are that Schrader valves are larger and have springs that close the valve except when the pin is depressed. Schrader valves are used in a wide variety of compressed gas and pressurized liquid applications.
Presta valve stems are 6mm diameter, whereas Schrader valve stems for bicycle tyres are 8mm, thus requiring a larger diameter hole in a bicycle rim. While not a concern on wider bike rims, it will weaken a narrow wheel rim, precluding their use on (road) racing bicycles. Another disadvantage of the Schrader is that the air chuck must depress the spring-loaded pin before air can flow during inflation, whereas the Presta valve relies solely on internal air pressure to keep it shut. This means that some air is lost while attaching and detaching pumps to Schrader valves, although this is usually nominal (most of the air which makes the "whooshing" noise when the pump is removed comes from the compressed air in the tube between the pump body and the attachment end, not the tyre via the momentarily-open Schrader valve). To fill up a bicycle tyre with a Presta-valved tube at a gas station requires an adaptor, while a Schrader-valved tube does not.
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- barefoot
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Re: MTB rims that suit ONLY Presta valves? -
Postby barefoot » Mon Aug 12, 2013 4:50 pm
Also, closer to home, frequently used on MTB air-sprung suspension.Dragster1 wrote:There is a large amount of pros and cons for both, a Schrader valve can hold in excess of 250psi, They use them in air conditioning and pressure vessel tanks
Lower pressure suspension designs are becoming more popular in recent times, but ~10 years ago it was common to run ~200 psi in a suspension fork.
I've seen Schrader valves on fire extinguishers before now, too.
tim
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Re: MTB rims that suit ONLY Presta valves? -
Postby Dragster1 » Mon Aug 12, 2013 4:50 pm
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Re: MTB rims that suit ONLY Presta valves? -
Postby barefoot » Mon Aug 12, 2013 4:53 pm
ORLY?rkelsen wrote:I didn't say that Schraeder valves don't hold pressure... Just that Presta valves are better at it.barefoot wrote:I've never had a problem with Schrader valves failing to hold pressure. Neither have about a billion car drivers.
Car tyres are "super low pressure." You're comparing apples & oranges.
I run lower pressure in my MTB tyres than I do in my car tyres... ~30 psi vs ~40 psi.
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Re: MTB rims that suit ONLY Presta valves? -
Postby DoubleSpeeded » Mon Aug 12, 2013 6:28 pm
Dragster1 wrote:BUT I would Rather argue with this And Sorry Kiddies LOOK AWAY NOW!!!
wohahhh that diverted my attention .. thats for sure!!!!!!! holey crap!
hmmmbarefoot wrote:Rims have no resale value anyway. They're consumable. You're much more likely to destroy the rim in service than sell it.DoubleSpeeded wrote:however, srilling may impede the resale of the rim right?
tim
well im guessing your talking about cheap rims...
like i said in another thread, ive got a set of: 2013 Reynolds Strike 66mm Full carbon wheelset for sale... ... well i better get some resale out of it!!!
same as the: FFWD 2013 carbon fibre Clincher DISC wheel aswell... if theres no resale... im spewing.
but i knwo someone will buy
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Re: MTB rims that suit ONLY Presta valves? -
Postby DoubleSpeeded » Mon Aug 12, 2013 6:30 pm
ive pumped up tubes on MTB with cheapie tubes that blew at 60psi
but as what a few has mentioned here... i personally have snapped a Presta valve too..
not the entire valve but that brass pin with the lock nut part..
i was in a rush and yanked the valve for the pump in an angle...because i hated the pressure loss when releasing so i did it as quick as possibly ...
it was slightly bent... and i think one more pump after that... it just snapped.
resulted in a new tube
i guess on the other hand, schrader wont have that problem.
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Re: MTB rims that suit ONLY Presta valves? -
Postby Duck! » Tue Aug 13, 2013 1:06 am
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Re: MTB rims that suit ONLY Presta valves? -
Postby bychosis » Tue Aug 13, 2013 6:17 am
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Re: MTB rims that suit ONLY Presta valves? -
Postby TTar » Tue Aug 13, 2013 12:45 pm
bychosis wrote: I put air in tyres at least monthly while the shocks often get to six months. It's the rubber in the tube that lets out most.
Irregardless of wheel size and valve type, I've found the skinnier the tyre, the faster the tube deflates.
Let the debate begin...
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Re: MTB rims that suit ONLY Presta valves? -
Postby Duck! » Tue Aug 13, 2013 1:49 pm
Fixed for you. No such word as "irregardless" exists.TTar wrote:
Regardless
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Re: MTB rims that suit ONLY Presta valves? -
Postby TTar » Tue Aug 13, 2013 3:56 pm
Bloody well does too exist! It even has its own Wikipedia entry;Duck! wrote:Fixed for you. No such word as "irregardless" exists.TTar wrote:
Regardless
http://en.wikipedia.org/wiki/Irregardless
This is a little of what wiki says;
"Irregardless is a word commonly used in place of regardless or irrespective..."
I think of it like this:
"regardless" is the Schrader valve.
"irrespective" is the Presta valve.
"irregardless" is the Dunlop valve.
We all have our preferences and we'll disagree from time to time, but my policy is "let a thousand flowers bloom".
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Re: MTB rims that suit ONLY Presta valves? -
Postby Dragster1 » Tue Aug 13, 2013 5:52 pm
If ONLY I could be a seat for just one day!!!!!!Dragster1 wrote:BUT I would Rather argue with this And Sorry Kiddies LOOK AWAY NOW!!!
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Re: MTB rims that suit ONLY Presta valves? -
Postby }SkOrPn--7 » Tue Aug 13, 2013 7:00 pm
Just as life deals out unfairness it would be the very day you win to be a saddle that my fat butt is parked on it......................Dragster1 wrote: If ONLY I could be a seat for just one day!!!!!!
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Re: MTB rims that suit ONLY Presta valves? -
Postby Dragster1 » Tue Aug 13, 2013 7:08 pm
LOL! I suppose being a nice guy that I am I could put up with a Turkey slap or two as long as you don't fart and if you do fart, I would split in two and spike your butt that hard you would have to throw me away. As a reward I get two days with the young honey thou}SkOrPn--7 wrote:Just as life deals out unfairness it would be the very day you win to be a saddle that my fat butt is parked on it......................Dragster1 wrote: If ONLY I could be a seat for just one day!!!!!!
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Re: MTB rims that suit ONLY Presta valves? -
Postby DoubleSpeeded » Wed Aug 14, 2013 9:39 pm
lol
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Re: MTB rims that suit ONLY Presta valves? -
Postby }SkOrPn--7 » Wed Aug 14, 2013 11:01 pm
Dragster1 wrote:LOL! I suppose being a nice guy that I am I could put up with a Turkey slap or two as long as you don't fart and if you do fart, I would split in two and spike your butt that hard you would have to throw me away. As a reward I get two days with the young honey thou}SkOrPn--7 wrote:Just as life deals out unfairness it would be the very day you win to be a saddle that my fat butt is parked on it......................Dragster1 wrote: If ONLY I could be a seat for just one day!!!!!!
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Re: MTB rims that suit ONLY Presta valves? -
Postby jacks1071 » Thu Aug 15, 2013 10:29 am
Might depend on the rim manufacturer but I have confirmation from Pro-Lite that you can drill out the MTB rims without effect on the warranty. I presume this would be acceptable with most other brands as well but maybe you should check with your wheel manufacturer first.DoubleSpeeded wrote:Hi guys
ive just noticed my MTB rim only takes Presta as the schrader is too wide.
i dont think drilling it out a bit wider with a drill bit to suit a schader is a good idea.
now im limited to choices?
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Re: MTB rims that suit ONLY Presta valves? -
Postby clackers » Thu Aug 15, 2013 4:01 pm
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