Are Presta valve caps uncool or what?
#102
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I remove BOTH. They are nothing but DEAD WEIGHT and DRAG.
Besides, are people seriously arguing caps are more Aero?? They at least DOUBLE the cross-section of the valve!
Besides, are people seriously arguing caps are more Aero?? They at least DOUBLE the cross-section of the valve!
#103
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I like how fietsbob gets his own square.
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5 pages about dust caps? Really?
Boggles the mind.
Boggles the mind.
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What everyone who wins an argument on the internet gets: Intense feeling of well-being and contentment, adulation from friends and strangers alike, and the satisfaction of knowing that the matter has been put to rest and need never be raised again.
#109
Cycleway town
Just for giggles, or because I was bored, I emailed a manufacturer of presta valve's and asked them their policy on caps and lock nuts. "Yes. We recommend to use cap. To avoid dust. And recommend to use locknut too. " So all you sloppy unkempt pin bending impaling death machine riding folks are going against manufacturer's recommendations. Good luck with your lawsuit
Like a moulded plastic seat, similar in shape to some quick-release compression seats. Or they could at least texture/shape the compression surface of the washer, so that it bites into the alloy. Whatever, this is clearly an area that's seen very little in the way of development.
#110
Banned
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Locknuts don't really work too well with deep-wall rims. They don't sit flush with any rim actually, it's like there's a part missing.
Like a moulded plastic seat, similar in shape to some quick-release compression seats. Or they could at least texture/shape the compression surface of the washer, so that it bites into the alloy. Whatever, this is clearly an area that's seen very little in the way of development.
Like a moulded plastic seat, similar in shape to some quick-release compression seats. Or they could at least texture/shape the compression surface of the washer, so that it bites into the alloy. Whatever, this is clearly an area that's seen very little in the way of development.
So, get with it! Offer us some properly shaped plastic washers that will fit flush with both the complex curved surface of the rim and the lockwasher. Yes, you will have to provide quite a few variations because rims vary so much, but ... it is you who are telling us this is important. And isn't it your obligation to provide us the means to install these critical parts without damaging the finish of our $1000 wheels? (These washers probably need to have wrench flats so they can be held in proper alignment with the rim. Perhaps a small wrench could be included.)
With these washers, properly installed, we will finally be able to have wheels done right. No gaps under the edges of the lock nuts and no scarred anodizing.
Ben
#112
Calamari Marionette Ph.D
Look at aeronautics. Shape and surface texture are far more important than actual size.
Notice that the threading on a valve closely resembles the fins of an automobile radiator? What is the purpose of an automobile's radiator fins? To catch air.
Bikes with no valve caps are suffering extreme aero penalties, and therefore experiencing significant speed losses.
Again. Any serious cyclist worth his salt (should) understands the performance benefits of a light weight and efficiently shaped valve cap. There are a lot of folks out there with no real understanding of the actual physics involved. It's not their fault. They are neither engineers nor physicists. But don't allow yourself to be fooled by the naive and unsophisticated.
Notice that the threading on a valve closely resembles the fins of an automobile radiator? What is the purpose of an automobile's radiator fins? To catch air.
Bikes with no valve caps are suffering extreme aero penalties, and therefore experiencing significant speed losses.
Again. Any serious cyclist worth his salt (should) understands the performance benefits of a light weight and efficiently shaped valve cap. There are a lot of folks out there with no real understanding of the actual physics involved. It's not their fault. They are neither engineers nor physicists. But don't allow yourself to be fooled by the naive and unsophisticated.
Last edited by SquidPuppet; 02-06-18 at 12:48 PM.
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Just for giggles, or because I was bored, I emailed a manufacturer of presta valve's and asked them their policy on caps and lock nuts. "Yes. We recommend to use cap. To avoid dust. And recommend to use locknut too. " So all you sloppy unkempt pin bending impaling death machine riding folks are going against manufacturer's recommendations. Good luck with your lawsuit
A long cap would stay looking nice I think, and if it could slide over the lock-ring at the bottom that would be a bonus.
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Can we buy valve caps with sleeves that go all the way down to the rim? It's not that I mind carefully wrapping my valve stems with vinyl tape to protect the threads. And for UV protection for the plastic part, on those Schraeder valves. It's just that it gets ratty after a ride or two and torn at the bottom (go all the way down so you don't get that dreadful CLACK going over bumps). Also, to get the end just right I really need to wrap the valve stem before putting the tube in and that's getting kind of old.
A long cap would stay looking nice I think, and if it could slide over the lock-ring at the bottom that would be a bonus.
A long cap would stay looking nice I think, and if it could slide over the lock-ring at the bottom that would be a bonus.
#120
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Look at aeronautics. Shape and surface texture are far more important than actual size.
Notice that the threading on a valve closely resembles the fins of an automobile radiator? What is the purpose of an automobile's radiator fins? To catch air.
Bikes with no valve caps are suffering extreme aero penalties, and therefore experiencing significant speed losses.
Again. Any serious cyclist worth his salt (should) understands the performance benefits of a light weight and efficiently shaped valve cap. There are a lot of folks out there with no real understanding of the actual physics involved. It's not their fault. They are neither engineers nor physicists. But don't allow yourself to be fooled by the naive and unsophisticated.
Notice that the threading on a valve closely resembles the fins of an automobile radiator? What is the purpose of an automobile's radiator fins? To catch air.
Bikes with no valve caps are suffering extreme aero penalties, and therefore experiencing significant speed losses.
Again. Any serious cyclist worth his salt (should) understands the performance benefits of a light weight and efficiently shaped valve cap. There are a lot of folks out there with no real understanding of the actual physics involved. It's not their fault. They are neither engineers nor physicists. But don't allow yourself to be fooled by the naive and unsophisticated.
Is this "Da Bomb?
#121
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Wouldn't the optimal valve cap be tear drop shaped, in the direction of rotation?
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Rydabent should get a square for each of his oft-repeated posts.
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Sometimes the top of it is headed into the wind, sometimes the side, or the bottom. The transition from the valve cap to the stem might be the most important part of the shape. Regular caps that have flat bottoms, a lot of turbulence (=drag) there. I'd be taping that part up also, except that it's a pain to redo it every time you top off the air.
#124
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Look why don't we just invent tires inflated by politicians breath.
That way they will never deflate so we won't need valves at all.
As we all know there is no end to a politician's hot air.
That way they will never deflate so we won't need valves at all.
As we all know there is no end to a politician's hot air.
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Sometimes the top of it is headed into the wind, sometimes the side, or the bottom. The transition from the valve cap to the stem might be the most important part of the shape. Regular caps that have flat bottoms, a lot of turbulence (=drag) there. I'd be taping that part up also, except that it's a pain to redo it every time you top off the air.
Maxxis Presta Valve Stems and Core Removal Tool - Black - Ultimate Cycle Store