Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-06-08, 02:10 AM   #1
damnable
Senior Member
Thread Starter
 
Join Date: Aug 2006
Location: Aus
Bikes:
Posts: 634
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Screw on valve covers, important?

Greetings,
I went to pump up my tires just then and found that both those little screw on valve covers have gone. Did I forget to put them back on last time...who knows, but BAM! they've gone.

So that begs the question, just how important are they? How likely are the valves stems to get damaged if I don't have them on? Should I presume that my LBS would stock them, or even autoshop?

The valves are Shraeder so if I am in trouble without them I can always borrow some off my sisters car until I find somewhere to buy them.
damnable is offline   Reply With Quote
Old 04-06-08, 03:48 AM   #2
CommuterRun
Conservative Hippie
 
Join Date: Mar 2005
Location: Wakulla Co. FL
Bikes:
Posts: 4,271
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Don't sweat it. The dust cap on a Shrader valve does just that, keeps dust and dirt out of the valve. However, if there's pressure on the tire nothing's going to get into the workings of the valve anyway. Before adding more air to a tire you can blow out any grit that may have gotten into the valve by just depressing the valve core.

I wouldn't worry about it, but you should be able to find dust caps, cheap, at any auto parts store. You can even get them shaped like bullets, dice, or little skulls, etc.
CommuterRun is offline   Reply With Quote
Old 04-06-08, 04:00 AM   #3
Rowan
Has opinion, will express
 
Join Date: Jun 2003
Bikes:
Posts: 14,661
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 59 Post(s)
Tyre joints should have heaps of them, so many that you might be able to beg a couple for nix. They do keep dirt out of Schrader valves. There was a thread in the Bicycle Mechanics forum not long ago that identified a tiny bit of grit as the cause of a deflating tyre.
Rowan is offline   Reply With Quote
Old 04-06-08, 05:50 AM   #4
GlassWolf
cat person
 
GlassWolf's Avatar
 
Join Date: Feb 2008
Location: N.W. Michigan
Bikes: Nashbar Race SIS (1987), Kestrel Talon (2007), Trek Fuel EX 9.5 (2007)
Posts: 509
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
mine are all presta, but on the road bike I don't even bother. on the MTB, I use them to keep mud and grime off of the valves so if I have to air up or air down on a trail I'm not wiping up mud with my shirt to clean up the valve stem.
GlassWolf is offline   Reply With Quote
Old 04-06-08, 07:54 AM   #5
BarracksSi
Bike ≠ Car ≠ Ped.
 
BarracksSi's Avatar
 
Join Date: Jul 2007
Location: Washington, DC
Bikes: Some bikes. Hell, they're all the same, ain't they?
Posts: 13,858
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I try to use them on both Presta and Schrader valves. Yeah, the seal keeps stuff out while riding, but it's when you stick a pump on there that can push junk into the seat of the seal.
BarracksSi is offline   Reply With Quote
Old 04-06-08, 08:32 AM   #6
curbtender
Senior Member
 
curbtender's Avatar
 
Join Date: Mar 2007
Location: SF Bay Area, East bay
Bikes: Marinoni, Kestral 200 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Schwinn Speedster, Mondia Special, Univega Alpina
Posts: 3,854
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Next time your at the gas station go look by the air pump, usually 2 or 3 sitting around...
curbtender is offline   Reply With Quote
Old 04-06-08, 08:51 AM   #7
wahoonc
Senior Member
 
wahoonc's Avatar
 
Join Date: Jan 2005
Location: On the road-USA
Bikes: Giant Excursion, Raleigh Sports, Raleigh R.S.W. Compact, Motobecane? and about 20 more! OMG
Posts: 16,687
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by curbtender View Post
Next time your at the gas station go look by the air pump, usually 2 or 3 sitting around...
Or any mall parking lot...I bet there are thousands of them

FWIW the only time I haven't run valve caps was when I was running tubulars, if one came unglued and rolled you didn't want the valve cap to cause it to hang up coming off the rim. The caps do an excellent job of protecting the valve assemble from mud, and grit.

Aaron
__________________
Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

"Cycling should be a way of life, not a hobby.
RIDE, YOU FOOL, RIDE!"
_Nicodemus

"Steel: nearly a thousand years of metallurgical development
Aluminum: barely a hundred
Which one would you rather have under your butt at 30mph?"
_krazygluon
wahoonc is offline   Reply With Quote
Old 04-06-08, 09:11 AM   #8
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,543
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
All of our bikes are presta valve. I keep valve caps on my rolled up spare tube to keep the stem from accidentally puncturing the tube while it's in my saddle bag. Once the tube is on the bike I don't care.
Retro Grouch is offline   Reply With Quote
Old 04-06-08, 09:37 AM   #9
Doug5150
Senior Member
 
Join Date: May 2005
Location: IL-USA
Bikes:
Posts: 1,661
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by CommuterRun View Post
Don't sweat it. The dust cap on a Shrader valve does just that, keeps dust and dirt out of the valve. However, if there's pressure on the tire nothing's going to get into the workings of the valve anyway. Before adding more air to a tire you can blow out any grit that may have gotten into the valve by just depressing the valve core.

I wouldn't worry about it, but you should be able to find dust caps, cheap, at any auto parts store. You can even get them shaped like bullets, dice, or little skulls, etc.
I have a pal at the local auto-parts store, and he warned me NEVER to buy the cheap "custom" valve caps.

The reason is that the cheaper caps are all made of aluminum, and valve stems are brass. They make them out of aluminum because it's silver and won't corrode visibly, but aluminum will suffer galvanic corrosion in contact with the brass stem, which tends to cause the cap to seize on the stem.

The only METAL valve caps you should buy are ones made of brass.
~
Doug5150 is offline   Reply With Quote
Old 04-06-08, 09:42 AM   #10
BarracksSi
Bike ≠ Car ≠ Ped.
 
BarracksSi's Avatar
 
Join Date: Jul 2007
Location: Washington, DC
Bikes: Some bikes. Hell, they're all the same, ain't they?
Posts: 13,858
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Doug5150 View Post
I have a pal at the local auto-parts store, and he warned me NEVER to buy the cheap "custom" valve caps.
Almost forgot about those..

Besides the galvanic corrosion, they have a separate rubber seal. After long enough, it'll degrade, separate from the cap, and get itself stuck inside the valve stem.

I've got some nice-looking anodized red valve caps that are completely worthless. Plain plastic is better.
BarracksSi is offline   Reply With Quote
Old 04-06-08, 10:02 AM   #11
wahoonc
Senior Member
 
wahoonc's Avatar
 
Join Date: Jan 2005
Location: On the road-USA
Bikes: Giant Excursion, Raleigh Sports, Raleigh R.S.W. Compact, Motobecane? and about 20 more! OMG
Posts: 16,687
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have a fairsized collection of stainless steel ones that are typically used on heavy equipment FWIW if you are checking your air pressure on a regular basis I don't think galvanic destruction/corrosion is that big of a deal. YMMV I do happen to have a source for some nice machined brass ones at about $10 a pair

Aaron
__________________
Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

"Cycling should be a way of life, not a hobby.
RIDE, YOU FOOL, RIDE!"
_Nicodemus

"Steel: nearly a thousand years of metallurgical development
Aluminum: barely a hundred
Which one would you rather have under your butt at 30mph?"
_krazygluon
wahoonc is offline   Reply With Quote
Old 04-06-08, 11:16 AM   #12
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Valve caps = 100% unecessary. Good way to add weight to your bike as well.
operator is offline   Reply With Quote
Old 04-06-08, 11:35 AM   #13
StephenH
Uber Goober
 
StephenH's Avatar
 
Join Date: Sep 2007
Location: Dallas area, Texas
Bikes:
Posts: 11,235
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
The dust caps are about 90% cosmetic. Years ago when fixing flats on dump trucks (think super dusty all the time), we never used those things and you very seldom have problems from it. It just slows you down when you go to air something up or check the pressure. They're not intended or needed to physically protect the valve from anything.
__________________
"be careful this rando stuff is addictive and dan's the 'pusher'."
StephenH is offline   Reply With Quote
Old 04-07-08, 08:52 AM   #14
Saintly Loser
Senior Member
 
Join Date: Jan 2006
Location: Brooklyn, New York
Bikes: Nothing special, but it works.
Posts: 541
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yeah, they're unnecessary, but I have some super-cool machined aluminum ones anodized in a shade of green that exactly matches my bike's paint. I saw them in a store in Japan and couldn't resist.

By the way, Japanese bicycle shops are completely full of really, reall cool stuff.
Saintly Loser is offline   Reply With Quote
Old 04-07-08, 10:15 AM   #15
SweetLou
Senior Member
 
SweetLou's Avatar
 
Join Date: Jul 2007
Bikes:
Posts: 2,114
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by damnable View Post
So that begs the question, just how important are they? How likely are the valves stems to get damaged if I don't have them on? Should I presume that my LBS would stock them, or even autoshop?
It doesn't beg the question, but they are not very important. On presta valves, they are not needed at all. Though I keep mine on. I figure they might just possibly somehow keep something from hitting the nut and damaging it.

If you live in a cold climate, the road salt and chemicals can damage the brass and seal of the valve, the cap will help to prevent this. Also if you do develop a small leak, a tight fitting valve cap will help. My recommendation is if you find one, put it on. But don't go out of your way to get one.
SweetLou is offline   Reply With Quote
Old 04-07-08, 01:27 PM   #16
I-Like-To-Bike
Been Around Awhile
 
I-Like-To-Bike's Avatar
 
Join Date: Oct 2004
Location: Burlington Iowa
Bikes: Vaterland and Ragazzi
Posts: 23,528
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Quote:
Originally Posted by operator View Post
Valve caps = 100% unecessary. Good way to add weight to your bike as well.
And the weird harmonics from the out of balance wheel!! Oh the horror of that extra gram of weight!
I-Like-To-Bike is offline   Reply With Quote
Old 04-07-08, 01:55 PM   #17
wahoonc
Senior Member
 
wahoonc's Avatar
 
Join Date: Jan 2005
Location: On the road-USA
Bikes: Giant Excursion, Raleigh Sports, Raleigh R.S.W. Compact, Motobecane? and about 20 more! OMG
Posts: 16,687
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by I-Like-To-Bike View Post
And the weird harmonics from the out of balance wheel!! Oh the horror of that extra gram of weight!
That is supposedly balanced out by the CSPC reflector that should be mounted on the opposite side of the wheel.

Aaron
__________________
Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

"Cycling should be a way of life, not a hobby.
RIDE, YOU FOOL, RIDE!"
_Nicodemus

"Steel: nearly a thousand years of metallurgical development
Aluminum: barely a hundred
Which one would you rather have under your butt at 30mph?"
_krazygluon
wahoonc is offline   Reply With Quote
Old 04-07-08, 02:04 PM   #18
MMACH 5
Cycle Dallas
 
MMACH 5's Avatar
 
Join Date: Jun 2005
Location: Land of Gar, TX
Bikes: Lucinda--2010 Jamis Aurora Elite & a few others
Posts: 3,610
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
My bike has steel cap with a core tool and a regular, plastic cap on the other wheel.
I think I got it with an old touring bike.

The only time I had to use it was on my wife's car. It had a defective core.
Attached Images
File Type: jpg metal-valve-cap.jpg (28.3 KB, 4 views)
MMACH 5 is offline   Reply With Quote
Old 04-07-08, 02:07 PM   #19
dobber
Perineal Pressurized
 
dobber's Avatar
 
Join Date: Oct 2003
Location: In Ebritated
Bikes:
Posts: 6,557
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by wahoonc View Post
That is supposedly balanced out by the CSPC reflector that should be mounted on the opposite side of the wheel
I though that's what spoke cards were for?
__________________
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
dobber is offline   Reply With Quote
Old 04-07-08, 04:30 PM   #20
Sprocket Man
Prefers Aluminum
 
Sprocket Man's Avatar
 
Join Date: Feb 2005
Location: Honolulu
Bikes: Wife: Trek 5200, C'dale Rush Feminine, Vitus 979 Me: Felt S25, Cervelo Soloist, C'dale Killer V500, Miyata Pro (fixie)
Posts: 2,671
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Saintly Loser View Post
Yeah, they're unnecessary, but I have some super-cool machined aluminum ones anodized in a shade of green that exactly matches my bike's paint. I saw them in a store in Japan and couldn't resist.

By the way, Japanese bicycle shops are completely full of really, reall cool stuff.
I have a 2 sets of gold anodized valve covers that I got from a store called Mont Bell in Tokyo. When I saw them, I had to buy them because they were just too cool to pass up.
Sprocket Man is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 04:13 PM.