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Presta valve nut

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Presta valve nut

Old 10-25-19, 12:01 PM
  #26  
Johnny Rad
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I put my thumb on the tire above the valve stem to counter this... seems to work fine.
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Old 10-25-19, 12:05 PM
  #27  
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Originally Posted by filipw1990
Hi,

Rear wheel in my new wheelset is assymetric. I found that nut on Presta valve looks let say "stupid".

Is it neccessary to use that part? I do not have problem with pumping up tire without nut. To stop "rattling" I want to use heat shrink.

What do you think? Is there any reason that I should use it?
Use black electrical tape. No more rattling.



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Old 10-25-19, 12:21 PM
  #28  
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Speaking of nuts, has anyone else noticed that it's a mast year for acorns?
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Old 10-25-19, 01:04 PM
  #29  
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Originally Posted by indyfabz
Speaking of nuts, has anyone else noticed that it's a mast year for acorns?
Yes, can't move a inch without running over one.
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Old 10-25-19, 03:44 PM
  #30  
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Originally Posted by blacknbluebikes
So, you're on the side of the road and just changed a flat.
As a purist, you don't use a CO2 inflator; you've sentenced yourself to this little 8" wanna-be pump that rides in your jersey pocket and requires 1,832 strokes to put air in a 700x23 so the velominati dudes don't snicker at you when they fly by on the A-ride at 26mph.
And you finally got that damned clincher tire's wire over the rim without pinch-flatting the third tube or breaking the unbreakable blue plastic tire lever because you had to use four levers and stand on the last one or cracking the carbon wheel you bought from your dental hygienist.
So you wiggle and jiggle and twist and wobble and try to get the damn head of the baby pump onto the valve stem far enough to seal but it keeps psssffting all the air out the sides and nothing goes into the damn tube which still might have a new hole in it cause you didn't rub a friggin cotton ball all over the inside of the kevlar chili dark matter advanced composition tire. Mainly, because you keep pushing the valve stem down into the 70mm carbon fakie aero shell of a wheel and it disappears down the damn hole and the air is going pssssfttt pssftfttft out the side and suddenly....
Oh... that's what those little nuts are for. I just chucked over in the grass somewhere....
Beautiful!
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Old 10-26-19, 06:58 AM
  #31  
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Originally Posted by indyfabz
Speaking of nuts, has anyone else noticed that it's a mast year for acorns?
and walnuts.
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Old 10-26-19, 11:23 AM
  #32  
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Originally Posted by Trsnrtr
and walnuts.
Yes. I expected to be hit on the head ere now. Someone ran over a squirrel on today’s ride. The rest of them seem to be having a good year too.
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Old 10-30-19, 07:37 AM
  #33  
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Originally Posted by burnthesheep
I run latex tubes. Meaning often a low starting pressure. I'd rather not plunge the stem into the tire/wheel inserting the pump head. So, enter the reliable nut.
Again palm of hand on back of tire prevents this
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Old 10-30-19, 07:57 AM
  #34  
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'Tis the off season
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Old 11-01-19, 11:21 PM
  #35  
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Originally Posted by tagaproject6
'Tis the off season
How dare you speak of an off season this early. Shame, shame, shame!
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Old 11-02-19, 06:46 AM
  #36  
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Originally Posted by merlinextraligh
Again palm of hand on back of tire prevents this
though with one hand doing this, some pump heads are a bit tricky operating with just the other hand. ymmv
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Old 11-03-19, 09:29 PM
  #37  
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Originally Posted by burnthesheep
I run latex tubes. Meaning often a low starting pressure. I'd rather not plunge the stem into the tire/wheel inserting the pump head. So, enter the reliable nut.
I run Vittoria and Challenge latex tubes (likely made at the same factory) and neither have threads for a valve nut.
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Old 11-04-19, 05:54 AM
  #38  
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Originally Posted by DaveSSS
I prefer to buy tubes with no threads on the stem. Most presta inflators slide over a smooth stem more easily. No threads means no nut.
Agree so I get the michelins. That said, I bought a tube once but can't recall the brand, and it seems an obvious solution, and not sure why it isn't more universal, but why don't even the threaded valve makers just put the thread only at eg. the bottom 1cm of the valve and leave the rest smooth?
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Old 11-04-19, 02:46 PM
  #39  
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Originally Posted by Sy Reene
Agree so I get the michelins. That said, I bought a tube once but can't recall the brand, and it seems an obvious solution, and not sure why it isn't more universal, but why don't even the threaded valve makers just put the thread only at eg. the bottom 1cm of the valve and leave the rest smooth?
This is not possible, unless the threads at the lower end are made larger in diameter, so the nut would slide over the unthreaded portion. Then the threaded portion wouldn't fit through the small hole in the rim. The smooth and threaded versions are both about the same diameter, so they fit the rim and presta inflators.
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Old 11-04-19, 02:50 PM
  #40  
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Originally Posted by john.b
I run Vittoria and Challenge latex tubes (likely made at the same factory) and neither have threads for a valve nut.
Now I have to go look, you're right.
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Old 11-04-19, 02:59 PM
  #41  
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I put as many nuts as I can on my valve stems. Retro-reflective nuts made out of reflective dork disks, spoke reflectors, and valve caps.
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Old 11-04-19, 03:18 PM
  #42  
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Originally Posted by DaveSSS
This is not possible, unless the threads at the lower end are made larger in diameter, so the nut would slide over the unthreaded portion. Then the threaded portion wouldn't fit through the small hole in the rim. The smooth and threaded versions are both about the same diameter, so they fit the rim and presta inflators.
A random stem (Specialized I think) image found.. basically.. why does threading go so far up.. extend the smooth bit further down the stem?

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Old 11-04-19, 03:36 PM
  #43  
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Accommodate different rims is why.
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Old 11-04-19, 04:05 PM
  #44  
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Originally Posted by znomit
Have you got any idea what that thing weighs?
It's an aero suck as well! Might as well have an anchor and a sail attached to each wheel.
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Old 11-04-19, 04:11 PM
  #45  
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Originally Posted by blacknbluebikes
As a purist, you don't use a CO2 inflator; you've sentenced yourself to this little 8" wanna-be pump that rides in your jersey pocket and requires 1,832 strokes to put air in a 700x23 so the velominati dudes don't snicker at you when they fly by on the A-ride at 26mph.
1) Real purists don't carry punps or CO2 - we huff and puff and blow the tube up with our own massive lung power.

2) 26 mph? Is it a recovery ride for arthritic grandmothers? Real velominati dudes (Use the V!) don't even shift out of the little ring til 45 kmh.

Sheesh... Internet Freds...
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Old 11-04-19, 04:19 PM
  #46  
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Can't believe it's been 18 months:

https://www.bikeforums.net/general-c...cool-what.html
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