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 11-16-05, 10:14 PM   #1
Wil Davis
Curmudgeon
Thread Starter
 
Wil Davis's Avatar
 
Join Date: Aug 2005
Location: Nausea, New Hamster
Bikes: (see http://wildavis.smugmug.com/Bikes) Bianchi Veloce (2005), Nishiki Cascade (1992), Schwinn Super Sport (1983)
Posts: 1,572
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Giant™ inner-tubes - problems?

I put a brand new set of slicks on my mountain bike a month or so ago, and fitted new inner-tubes at the same time. Within half an hour, I noticed that the front tyre had gone flat, and I subsequently found that there was a leak right next to the valve-stem. This was the first time I'd ever had that type of puncture. Well, I fitted the old tube, and took the bad tube back to my LBS who replaced it without question. I've done less than 100 road miles on the bike since fitting the slicks, and this evening, I noticed that the rear tyre was flat… so, I took it off and found that exactly the same thing had happened - a small hole right next to the valve-stem (see picture). The new inner-tubes were made by "Giant" and I was wondering if anyone else has had similar problems with this brand? The bike is over 12 years old, and I've had at least four different brands of tyres/tubes on it, but this is the first time I've ever seen this type of problem. At least it didn't happen 30 miles from home…

- Wil
Wil Davis is offline   Reply With Quote
Old 11-16-05, 11:01 PM   #2
3niktac
Senior Member
 
3niktac's Avatar
 
Join Date: Dec 2004
Location: Philadelphia
Bikes:
Posts: 58
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've never had a Giant tube, but a shop by me regularly has sales on specialized tubes. Without fail, they live a very short life, dying just as your tube did. It leads me to believe that some tubes are just not worth buying.

C
3niktac is offline   Reply With Quote
Old 11-16-05, 11:19 PM   #3
seely
The Rabbi
 
seely's Avatar
 
Join Date: Apr 2004
Bikes:
Posts: 5,088
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Most tubes come from one of a few factories. I used Specialized for years and years with no problems at all. I currently use Bontrager, but have used Giant, Kenda, Wrenchforce and a few others without noticeably more problems from one to the other.
seely is offline   Reply With Quote
Old 11-17-05, 12:39 AM   #4
chis51hd
Senior Member
 
chis51hd's Avatar
 
Join Date: Jun 2005
Location: Davao City, Philippines
Bikes:
Posts: 182
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
My tires are M.O.B. slicks, 1.5; and I'm using the exact same tubes. Haven't had a flat yet (knock on wood). When I bought the tubes the guy at the LBS said to take care in inflating them, bracing your hand on the rim so the stem doesn't bend much while pumping. And not to tighten the ring/lock thingy at the base of the stem too much against the rim.
chis51hd is offline   Reply With Quote
Old 11-18-05, 06:15 AM   #5
montana_cyclist
Senior Member
 
Join Date: Jan 2004
Location: Miles City, MT
Bikes: Holdsworth Record, Bianchi San Remo, DeSalvo
Posts: 54
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hi, I had a similar problem on my Holdsworth road bike a few years back and went through several tubes. Some of the flats occurred on the road and to the point that I did not venture too far afield without extra tubes. It had the LBS owner puzzled, and he finally took a closer look at the tube and realized I had been sold the wrong size sometime in the past. After that folks had simply looked at the size of the ruined tube and replaced it. I am sorry to say that I cannot remember whether the tube was too large or too small. He replaced the tube with the correct size, and I have not had a problem since. I donot ride this bicycle a lot, but the tube has been fine over several years and a few hundred miles.
montana_cyclist is offline   Reply With Quote
Old 11-18-05, 06:33 AM   #6
Waldo
Zippy Engineer
 
Waldo's Avatar
 
Join Date: Jan 2003
Location: IN
Bikes: Bianchi 928, Bianchi Pista Concept 2004, Surly Steamroller, 1998 Schwinn Factory Team Homegrown, 1999 Schwinn Homegrown Factory, 2000 Schwinn Panther, Niner EMD9
Posts: 1,801
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sold literally hundreds, if not thousands of Giant tubes. Only times we've had problems of that nature is when someone tightens the heck out of the nut.
Waldo is offline   Reply With Quote
Old 11-18-05, 09:03 AM   #7
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)
Good reason to just toss the nut.
sydney is offline   Reply With Quote
Old 11-18-05, 03:49 PM   #8
Brian
Senior Member
 
Brian's Avatar
 
Join Date: Nov 2004
Location: Between the mountains and the lake.
Bikes: 8 bikes - one for each day of the week!
Posts: 16,683
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've had no problems with Specialized tubes, but I've got a Cheng Shin that's been on 3 bikes over 4 years and still no flats. Go figure.

Oh, I've never seen a Giant tube, but they're probably all from one or two factories.
Brian is offline   Reply With Quote
Old 11-18-05, 05:04 PM   #9
Wil Davis
Curmudgeon
Thread Starter
 
Wil Davis's Avatar
 
Join Date: Aug 2005
Location: Nausea, New Hamster
Bikes: (see http://wildavis.smugmug.com/Bikes) Bianchi Veloce (2005), Nishiki Cascade (1992), Schwinn Super Sport (1983)
Posts: 1,572
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by sydney
Good reason to just toss the nut.
Good point…

- but in 40+ years of using Prestas, I've never had problems with my nuts… so to speak…

I have a couple of the tubes with thread-less stems on one of the road-bikes, and found I had to put some tape around them to stop the rattling (even when they're at 120 psi) -

- Wil

Last edited by Wil Davis; 11-18-05 at 05:43 PM.
Wil Davis is offline   Reply With Quote
Old 06-20-12, 10:42 AM   #10
rayhosler
Newbie
 
Join Date: Feb 2006
Bikes:
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Inner tubes have issues

Quote:
Originally Posted by Wil Davis View Post
I put a brand new set of slicks on my mountain bike a month or so ago, and fitted new inner-tubes at the same time. Within half an hour, I noticed that the front tyre had gone flat, and I subsequently found that there was a leak right next to the valve-stem. This was the first time I'd ever had that type of puncture. Well, I fitted the old tube, and took the bad tube back to my LBS who replaced it without question. I've done less than 100 road miles on the bike since fitting the slicks, and this evening, I noticed that the rear tyre was flat… so, I took it off and found that exactly the same thing had happened - a small hole right next to the valve-stem (see picture). The new inner-tubes were made by "Giant" and I was wondering if anyone else has had similar problems with this brand? The bike is over 12 years old, and I've had at least four different brands of tyres/tubes on it, but this is the first time I've ever seen this type of problem. At least it didn't happen 30 miles from home…

- Wil
I have some new Giant presta-valve tubes and they leak at the valve stem, even when I twist the stem tight. It's bad enough that I have to add air every couple of days. I put a new one in water and it leaks at the stem.

I've also had many tubes of various brands separate where the stem's round rubber/metal base joins the tube. The separation causes the tube to lose air slowly and you have to look at the tube closely to see the point of separation. http://rayhosler.wordpress.com/2009/...have-yourtube/
My blog has a photo.

I complained to the distributor and some tubes were replaced. I do this just so they'll know they have an issue.
rayhosler is offline   Reply With Quote
Old 06-20-12, 10:49 AM   #11
DCB0
Banned.
 
Join Date: Apr 2011
Bikes: CCM Torino 76
Posts: 937
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Wil Davis View Post
I put a brand new set of slicks on my mountain bike a month or so ago, and fitted new inner-tubes at the same time. Within half an hour, I noticed that the front tyre had gone flat, and I subsequently found that there was a leak right next to the valve-stem. This was the first time I'd ever had that type of puncture. Well, I fitted the old tube, and took the bad tube back to my LBS who replaced it without question. I've done less than 100 road miles on the bike since fitting the slicks, and this evening, I noticed that the rear tyre was flat… so, I took it off and found that exactly the same thing had happened - a small hole right next to the valve-stem (see picture). The new inner-tubes were made by "Giant" and I was wondering if anyone else has had similar problems with this brand? The bike is over 12 years old, and I've had at least four different brands of tyres/tubes on it, but this is the first time I've ever seen this type of problem. At least it didn't happen 30 miles from home…

- Wil
What type of pump are you using? Rough handling while pumping, especially if using a mini-pump or frame-fit pump, will often cause the tube to tear at the valve.
DCB0 is offline   Reply With Quote
Old 06-20-12, 11:55 AM   #12
cny-bikeman
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Bikes: 2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
Posts: 6,322
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
Did not see a pic - it's important to know exactly what the hole looks like to be able to diagnose the cause. The most common leak near the valve stem is from stress due to poor pumping technique or riding on underinflated tires. The leak typically is a very small tear, rather than a puncture, and there is sometimes a small stretched area of tube forming a "bubble" adjacent to the leak.
cny-bikeman is offline   Reply With Quote
Old 06-20-12, 12:28 PM   #13
dscheidt
Senior Member
 
Join Date: Jul 2008
Bikes:
Posts: 1,374
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by seely View Post
Most tubes come from one of a few factories. I used Specialized for years and years with no problems at all. I currently use Bontrager, but have used Giant, Kenda, Wrenchforce and a few others without noticeably more problems from one to the other.
Even if they're coming from the same factory, there are lots of options in the quality of the tubes. there are a depressing number of tubes on the market these days that are just total pieces of ****. the valve stem -- whether it be presta or shrader -- is poorly attached to the body of the tube, and fails like this. I've seen a number of brand new schrader valve tubes fail this way, straight out of the box. they were unbranded tubes oft Tawainese orign.
dscheidt 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 12:56 PM.