Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

5 flats in 150 miles! Help

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.

5 flats in 150 miles! Help

Old 09-13-06, 01:01 PM
  #1  
Ranzak
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
5 flats in 150 miles! Help

Ok I enjoy a puzzle as much as the next person but enough is enough!

I have had one flat on my road bike in over 5000 miles; probably 3 flats on my old mountain bike in over 3000 miles.

The problem is with my 2007 Specialized Stumpjumper FSR Comp. 4 rear flats and 1 front flat in the first 150 miles. 3 different brands of tubes. Different places on the tube. I have meticulously checked the inside of the wheels (especially the rear). I run 45 lbs of air pressure. I ride the same trails as my old Mt. bike

Any ideas??
 
Old 09-13-06, 01:06 PM
  #2  
'nother
semifreddo amartuerer
 
'nother's Avatar
 
Join Date: Oct 2004
Location: Northern CA
Posts: 4,599

Bikes: several

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Hard to say with that info, could be lots of things. It's best if you can confirm the actual cause of a flat before/during changing it. E.g. don't just change it and move on if you can't point to a specific cause. Were you able to determine without a doubt the actual cause on any of these flats?
'nother is offline  
Old 09-13-06, 01:11 PM
  #3  
Ranzak
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
Nope. I never just change a tube without finding the cause until this bike. Never found anything: briar, thorn, rim problem etc. Just an unbelievably small air leak in the tube.
 
Old 09-13-06, 01:37 PM
  #4  
'nother
semifreddo amartuerer
 
'nother's Avatar
 
Join Date: Oct 2004
Location: Northern CA
Posts: 4,599

Bikes: several

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Hm. Well it's gotta be something. If the tread wear is not too bad, maybe try swapping front/rear tires. That won't fix the problem but it might tell you if it's something with the tire. If you suddenly start getting a bunch of flats on the front, try a new tire or maybe a new set front + rear. If you still keep getting them on the rear I'd look into riding style, route, maybe inflation pressure.
'nother is offline  
Old 09-13-06, 01:43 PM
  #5  
humble_biker
so much for physics
 
humble_biker's Avatar
 
Join Date: Aug 2006
Location: over there
Posts: 562

Bikes: Scott CR1 team, Fuji track pro, NYCbike, Cannondale, Free Spirit, GT Edge

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
What's the shape of the holes?
Is the tire the same width, etc of the old bike?
humble_biker is offline  
Old 09-13-06, 01:56 PM
  #6  
VegasCyclist
suitcase of courage
 
VegasCyclist's Avatar
 
Join Date: Mar 2002
Location: SoCal (ex Las Vegas, NV)
Posts: 1,010
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Ranzak
Ok I enjoy a puzzle as much as the next person but enough is enough!

I have had one flat on my road bike in over 5000 miles; probably 3 flats on my old mountain bike in over 3000 miles.

The problem is with my 2007 Specialized Stumpjumper FSR Comp. 4 rear flats and 1 front flat in the first 150 miles. 3 different brands of tubes. Different places on the tube. I have meticulously checked the inside of the wheels (especially the rear). I run 45 lbs of air pressure. I ride the same trails as my old Mt. bike

Any ideas??

It may be the rim strip/rim tape. If there is a slight exposure to the spoke nipples then the tube could get a puncture when inflated. a easy fix is to either buy new rim tape, or wrap the inside of the rim with electrical tape (3 times at least)
__________________
-VegasCyclist
"Daddy made whiskey and he made it well.... cost two dollars and it burned like hell...."
Register!
VegasCyclist is offline  
Old 09-13-06, 02:01 PM
  #7  
Rowan
Senior Member
 
Join Date: Jun 2003
Posts: 16,754
Mentioned: 120 Post(s)
Tagged: 0 Thread(s)
Quoted: 1427 Post(s)
Liked 21 Times in 14 Posts
"Incredibly small" sounds like incredibly small Michelin wire, which is incredibly difficult to pinpoint in a tyre casing. Get a wad of cotton wool and "swab" around the inside of the casing in one direction, then the other. A wire (even thorn or piece of glass) will drag a piece of cotton out. A piece of wire might even retract into the casing when the tyre is deflated, making things even more difficult.

Do you take the tyre and tube off the rim as a complete unit? Do you then inflate the tube in the tyre casing and check to hear where the puncture is? Then locate the item causing the puncture adjacent to the hole in the tube? If not, it might be worth trying to localise the problem.
Rowan is offline  
Old 09-13-06, 02:29 PM
  #8  
Ranzak
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
The tires are Specialized Resolutions that came brand new on this 2007 brand new bike. the flats started upon purchase. The rim strips likewise are brand new and seem to completely cover the spoke nipples. I am fairly obsessive at this point and I do as Rowan suggested and take tire and tube off as a unit to try and locate problem by particularly looking at areas immediately adjacent... I have not tried the cotton which could reveal the casing problem but I have ran my hands over and over every square mm of the casing...
 
Old 09-13-06, 02:50 PM
  #9  
VegasCyclist
suitcase of courage
 
VegasCyclist's Avatar
 
Join Date: Mar 2002
Location: SoCal (ex Las Vegas, NV)
Posts: 1,010
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Ranzak
The tires are Specialized Resolutions that came brand new on this 2007 brand new bike. the flats started upon purchase. The rim strips likewise are brand new and seem to completely cover the spoke nipples. I am fairly obsessive at this point and I do as Rowan suggested and take tire and tube off as a unit to try and locate problem by particularly looking at areas immediately adjacent... I have not tried the cotton which could reveal the casing problem but I have ran my hands over and over every square mm of the casing...
Another possiblity is pinch flatting, what kind of trails are you riding? if they have a lot of angular rocks this could be a problem... perhaps try running 50-55 psi..?
__________________
-VegasCyclist
"Daddy made whiskey and he made it well.... cost two dollars and it burned like hell...."
Register!
VegasCyclist is offline  
Old 09-13-06, 02:54 PM
  #10  
Ranzak
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
probably 3 flats on my old mountain bike in over 3000 miles.

I ride the same trails as my old Mt. bike.

I have never had the "tell-tale" signs of a pinch flat
 
Old 09-13-06, 03:18 PM
  #11  
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 29,278

Bikes: Catrike 559 I own some others but they don't get ridden very much.

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1163 Post(s)
Liked 33 Times in 25 Posts
You said the flats are occuring at different places on the tube. My question is: "Do you align your tire the same way with the valve stem every time?" If you haven't, you may have a thorn or a piece of glass stuck in your tire that's causing repeated flats.
Retro Grouch is offline  
Old 09-13-06, 03:46 PM
  #12  
Ranzak
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
[QUOTE=Retro Grouch]You said the flats are occuring at different places on the tube. My question is: "Do you align your tire the same way with the valve stem every time?" If you haven't, you may have a thorn or a piece of glass stuck in your tire that's causing repeated flats.[/QUOTE

Yes I always align the tire pressure recommendation marks with the stem
 
Old 09-13-06, 03:52 PM
  #13  
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 29,278

Bikes: Catrike 559 I own some others but they don't get ridden very much.

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1163 Post(s)
Liked 33 Times in 25 Posts
[QUOTE=Ranzak]
Originally Posted by Retro Grouch
You said the flats are occuring at different places on the tube. My question is: "Do you align your tire the same way with the valve stem every time?" If you haven't, you may have a thorn or a piece of glass stuck in your tire that's causing repeated flats.[/QUOTE

Yes I always align the tire pressure recommendation marks with the stem
Well, there went that theory. In that case I have two ideas.

The first is to keep trying to analyze what might be causing your flats. Maybe you're picking up throns from someplace that you ride regularly. Assuming there's a systematic cause, you'll figure it out if you think about it for long enough.

The second is to buy a lottery ticket because you've obviously used up a normal quota of bad luck.
Retro Grouch is offline  
Old 09-13-06, 04:04 PM
  #14  
Ranzak
Guest
 
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
[QUOTE=Retro Grouch]
Originally Posted by Ranzak


The second is to buy a lottery ticket because you've obviously used up a normal quota of bad luck.
LOL
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
55 Traveler
Classic & Vintage
35
03-17-12 10:27 AM
mikerhymeswith
Bicycle Mechanics
37
01-21-10 05:29 AM
davidmcowan
General Cycling Discussion
4
01-30-07 09:09 PM
a2psyklnut
Mountain Biking
4
10-10-03 11:47 AM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.