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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-22-04, 08:04 AM   #1
mcavana
the commutor / tourer
Thread Starter
 
mcavana's Avatar
 
Join Date: Aug 2004
Location: jacksonville fl
Bikes: trek 6700 turned touring machine, giant TCR2
Posts: 626
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Prest valve lock nuts and valve covers

The guy at my local bike shop says i don't need to use either the plastic valve covers or the lock nuts on my presta valves. he says the only reason the tubes come with the plastic valve covers is so when they are folded up in your bag, the vavle stem does not damage the tube. He says he does not use the lock nuts because they can stress the tube at the base of the stem, they make a stem that is not lined up correctly with hole in rim look straight and ultimately they don't do anything good except hold the stem out when filling.

What are your thoughts? this isn't a big deal, but it would be nice to not have to screw those nuts on if not necessary (i do have long stems, takes some time) It would also be nice if i didn't have to get down on my hands and knees and look for the stupid plastic valve covers every time i drop one (happens at least 2 times when i change tire... used to hold it with my teeth until one day i couphed and ate one!!)
mcavana is offline   Reply With Quote
Old 08-22-04, 08:07 AM   #2
sydney
Senior Member
 
sydney's Avatar
 
Join Date: Jan 2004
Bikes:
Posts: 9,428
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by mcavana
The guy at my local bike shop says i don't need to use either the plastic valve covers or the lock nuts on my presta valves. he says the only reason the tubes come with the plastic valve covers is so when they are folded up in your bag, the vavle stem does not damage the tube. He says he does not use the lock nuts because they can stress the tube at the base of the stem, they make a stem that is not lined up correctly with hole in rim look straight and ultimately they don't do anything good except hold the stem out when filling.

What are your thoughts? this isn't a big deal, but it would be nice to not have to screw those nuts on if not necessary (i do have long stems, takes some time) It would also be nice if i didn't have to get down on my hands and knees and look for the stupid plastic valve covers every time i drop one (happens at least 2 times when i change tire... used to hold it with my teeth until one day i couphed and ate one!!)
The LBS guy is absolutely right.
sydney is offline   Reply With Quote
Old 08-22-04, 09:39 AM   #3
mcavana
the commutor / tourer
Thread Starter
 
mcavana's Avatar
 
Join Date: Aug 2004
Location: jacksonville fl
Bikes: trek 6700 turned touring machine, giant TCR2
Posts: 626
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
hooray!!!
mcavana is offline   Reply With Quote
Old 08-22-04, 09:41 AM   #4
Fat Hack
Guest
 
Bikes:
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
agree
  Reply With Quote
Old 08-22-04, 11:09 AM   #5
Raiyn
I drink your MILKSHAKE
 
Raiyn's Avatar
 
Join Date: Jul 2002
Location: St. Petersburg, FL
Bikes: 2003 Specialized Rockhopper FSR Comp, 1999 Specialized Hardrock Comp FS, 1971 Schwinn Varsity
Posts: 15,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Exactly right
__________________
Raiyn is offline   Reply With Quote
Old 08-22-04, 01:27 PM   #6
prestonjb
ld-cyclist
 
prestonjb's Avatar
 
Join Date: Aug 2003
Bikes:
Posts: 380
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's not required and I don't use them. What are they for?

1) helps hold the stem up so it is easier to get the pump head on.
2) Keeps the MUCK and dirt from getting into the valve area and thus cloging the valve open...

Stressing the tube? Nope that would be if you overtighten the nut.
prestonjb is offline   Reply With Quote
Old 08-22-04, 07:22 PM   #7
John E
feros ferio
 
John E's Avatar
 
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Posts: 16,907
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
I agree. The cap can press against the valve stem projection, causing a slow air leak. The nut, if put on before the tube is inflated, will make you more likely to pinch the tube between the tyre bead and the rim. Save (a little) rotating weight and (a little) time during puncture repairs!
__________________
"Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
John E is offline   Reply With Quote
Old 08-22-04, 09:07 PM   #8
Grampy™
Geezer Member
 
Grampy™'s Avatar
 
Join Date: Sep 2003
Location: Cedar Rapids, IA
Bikes: Airborne, LeMond, Bianchi CX, Volae Century, Redline 925 (fixed) and a Burley Tandem.
Posts: 1,384
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Uh, oh..... forum member all agree on something......
Grampy™ is offline   Reply With Quote
Old 08-22-04, 10:53 PM   #9
Raiyn
I drink your MILKSHAKE
 
Raiyn's Avatar
 
Join Date: Jul 2002
Location: St. Petersburg, FL
Bikes: 2003 Specialized Rockhopper FSR Comp, 1999 Specialized Hardrock Comp FS, 1971 Schwinn Varsity
Posts: 15,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Grampy™
Uh, oh..... forum member all agree on something......
RUN FOR IT!!!!

Heh
__________________
Raiyn is offline   Reply With Quote
Old 08-22-04, 11:30 PM   #10
sakarias
Senior Member
 
Join Date: Aug 2002
Location: Juneau, AK
Bikes:
Posts: 201
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hmmm. I guess I'm out voted, but I use the caps. I want to keep grit (in our rainy climate) out of the valve seat. I had to toss a schrader valve tube, years and yearsago, that leaked, perhaps from grit getting into the valve seat.

I use the rings when inflating a deflated tube. Helps get the pump on. I run the ring a ways down the valve shaft, then push on the pump. After I finish pumping, usually, I run it down the rest of the way, but not tight, and leave it there.

I have never lost air from using the cap. I have never damaged a tube by using the ring. I am not concerned about the tiny extra weight.

I have never lost a cap. My wife loses them frequently.

So, one small contrary view. (Guess you don't have to run for cover?!)

As always, "your mileage may vary."
sakarias is offline   Reply With Quote
Old 08-23-04, 02:53 AM   #11
Ed Holland
8speed DinoSORAs
 
Ed Holland's Avatar
 
Join Date: Jul 2002
Location: Oxford, UK or Mountain View, Ca
Bikes:
Posts: 2,749
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well Mcavana, I think the guy at your bike shop is wrong!

I use the valve cap, it keeps all the grit and grime out of the tube's valve mechanism - this is particularly worthwhile if one ever rides in wet weather or dirty conditions. It certainly can't do any harm, unless you're eating a lot of them . The locking ring is much less important - as evidenced by many tubes which are made without threading on the valve stem.

Its your choice at the end of the day though

Cheers,

Ed
__________________
Get a bicycle. You will certainly not regret it, if you live.
Ed Holland is offline   Reply With Quote
Old 08-23-04, 02:59 AM   #12
Mzungu
Senior Member
 
Join Date: Oct 2001
Location: Arusha, Tanzania
Bikes:
Posts: 124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
There is a case to use the lock.

I agree the ring can cause problems while riding . The exception is during roadside inflation, it helps keep the valve secure when you are using a frame pump and it rocks back and forth and you are tired. With out the lock there is more stress while inflating with frame pump.
Mzungu is offline   Reply With Quote
Old 08-23-04, 03:24 AM   #13
bkrownd
kipuka explorer
 
bkrownd's Avatar
 
Join Date: Apr 2004
Location: Hilo Town, East Hawai'i
Bikes: 1994 Trek 820, 2004 Fuji Absolute, 2005 Jamis Nova, 1977 Schwinn Scrambler 36/36
Posts: 3,293
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The last presta tube that I bought doesn't even have any threads for a locking nut.
__________________
--
-=- '05 Jamis Nova -=- '04 Fuji Absolute -=- '94 Trek 820 -=- '77 Schwinn Scrambler 36/36 -=-
Friends don't let friends use brifters.
bkrownd is offline   Reply With Quote
Old 08-24-04, 01:57 AM   #14
EyeBike2
Member
 
Join Date: Aug 2004
Location: Southern California
Bikes:
Posts: 39
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Man I agree. For using a hand pump on the side of a trail, those lock nuts make things much easier.
EyeBike2 is offline   Reply With Quote
Old 08-24-04, 03:20 AM   #15
khuon
DEADBEEF
 
khuon's Avatar
 
Join Date: Aug 2002
Location: Catching his breath alongside a road near Seattle, WA USA
Bikes: 1999 K2 OzM, 2001 Aegis Aro Svelte
Posts: 12,242
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You also need to be careful if using the lockring. If you tighten it down too much and inflate, there is a chance that as the tube expands in the rim and tries to tug at the ring, the entire stemcore will pop out. I've had this happen before. Use the ring to get things started and at about 15 to 20 PSI or when it seems everything has gotten form and seated, either loosen it or take it off altogether before continuing to inflate. If you want to keep it on then make sure it's just finger-snug after the tube is fully inflated.

I admit that I keep my lockrings on my tubes that have them. I also keep the valve covers for no specific reason. I have found that tubes without full threading and thus without lockrings are better in that they don't degrade the seals in my pumps as quickly so I've started buying those instead.
__________________
1999 K2 OzM 2001 Aegis Aro Svelte
"Be liberal in what you accept, and conservative in what you send." -- Jon Postel, RFC1122
khuon is offline   Reply With Quote
Old 08-24-04, 08:59 AM   #16
tbick
Senior Member
 
Join Date: Mar 2004
Location: DFW
Bikes: Cannondale 500, Motobecane Super Touring, DiamondBack Mtn Bike
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Grampy™
Uh, oh..... forum member all agree on something......

I'll save the day,,,,no we don't .

You should use the lock nut but not the cover....no wait...you should use the cover but not the lock nut......oh crap...now I'm really confused
tbick is offline   Reply With Quote
Old 08-24-04, 10:25 AM   #17
RainmanP
Mr. Cellophane
 
RainmanP's Avatar
 
Join Date: Nov 2000
Location: New Orleans, LA
Bikes:
Posts: 3,037
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hmm, well, I've been using both all this time. I may rethink the nut, but I will continue using the cap. I just don't see how it can be good to get grit and crud in around that valve seat.
__________________
If it ain't broke, mess with it anyway!
RainmanP is offline   Reply With Quote
Old 08-24-04, 10:27 AM   #18
a2psyklnut
NCAA - DUAL CHAMPIONS!
 
a2psyklnut's Avatar
 
Join Date: Mar 2000
Location: From Sarasota, FL sitting in front of a computer spewing random thoughts!
Bikes: Intense Uzzi SL, Masi Speciale, Trek 3700 Nashbar Single Speed, Old Cilo Road frame
Posts: 7,964
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Gary Fisher Rep had these yellow fish stem covers, so I use them!!!!

Here little fishy....Here little fishy......

L8R
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger
a2psyklnut is offline   Reply With Quote
Old 08-26-04, 12:17 AM   #19
froze
Banned.
 
Join Date: Feb 2003
Location: Fort Wayne, Indiana
Bikes: 84 Trek 660 Suntour Superbe; 87 Giant Rincon Shimano XT; 07 Mercian Vincitore Campy Veloce
Posts: 4,762
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I agree with Sak. I use the nut just to make it easier to inflate the tire...but you could do the same thing by pressing in on the tire where the valve is to force the valve up out of the hole; that's how I usually do it anyway, it's just easier the other way. The nut will not stress the tube IF you don't overtighten it, just finger snug itand your fine. Now you could make an argument about the nuts weight, but it's not going to kill you-if it does then your too weak to be on a bike anyway!!!

The plastic cover will not allow the air to leak out if on too tight, reason being...you have the valve nut tightened. The plastic cover does prevent dirt and water from getting into the rather fragil valve and screwing it up later when you need it to work. And what the heck does the little plastic cover weigh? I doubt if 2 combine weigh over a gram-I can't even feel the weight in my hand!!!

So gee, what to do? I would rather go without the nut and keep the cover if I had to choose between one or the other; but since I don't race, nor am I a weight weenie, I use both.
froze is offline   Reply With Quote
Old 08-26-04, 04:08 PM   #20
SanDiegoSteve
Senior Member
 
SanDiegoSteve's Avatar
 
Join Date: Mar 2004
Location: San Diego
Bikes: Felt Fc, Litespeed Ghisallo, beach cruiser
Posts: 278
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Anyone else get an annoying rattle without the nut? I had a tube with a threadless stem. After about 12 months, it started to rattle a lot. I used it as a que to change it.
The replacement had a nut, so I put it on. I didn't like the rattle.
SanDiegoSteve 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 02:10 PM.