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

Inner tube pattern

Notices
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.

Inner tube pattern

Old 06-26-22, 09:55 AM
  #1  
alexk_il
Junior Member
Thread Starter
 
Join Date: Jun 2022
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked 5 Times in 5 Posts
Inner tube pattern

Just replaced an old tube, noticed a strange crossed pattern. I'm sure it's my fault, but I'm still curious how I caused it? The tube is OK otherwise.

alexk_il is offline  
Old 06-26-22, 09:58 AM
  #2  
10 Wheels
Galveston County Texas
 
10 Wheels's Avatar
 
Join Date: Nov 2007
Location: In The Wind
Posts: 32,631

Bikes: 02 GTO, 2011 Magnum

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 1211 Post(s)
Liked 897 Times in 442 Posts
Low PSI?
__________________
Fred "The Real Fred"

10 Wheels is offline  
Likes For 10 Wheels:
Old 06-26-22, 10:15 AM
  #3  
79pmooney
A Roadie Forever
 
79pmooney's Avatar
 
Join Date: Oct 2014
Location: Portland, OR
Posts: 10,600

Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder

Mentioned: 115 Post(s)
Tagged: 0 Thread(s)
Quoted: 3492 Post(s)
Liked 2,272 Times in 1,477 Posts
Are those marks on the side of the tube? Tire iron marks? Or is there a similar pattern on the inside of the tire?

One thing I try to do is keep the inner tube untwisted so any damage seen on the tube after being pulled out can be matched with the same spot on both the tire and rim. (And I always mount tire with the label either the valve or the rim weld. I vacillate between the two, Valve is easier and faster but the label gets dirtier from my hands while pumping and the rim weld location has a long history as that is where tubular tire labels are located. Tugs my heart.)
79pmooney is offline  
Old 06-26-22, 10:22 AM
  #4  
alexk_il
Junior Member
Thread Starter
 
Join Date: Jun 2022
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked 5 Times in 5 Posts
Originally Posted by 79pmooney View Post
Are those marks on the side of the tube? Tire iron marks? Or is there a similar pattern on the inside of the tire?

One thing I try to do is keep the inner tube untwisted so any damage seen on the tube after being pulled out can be matched with the same spot on both the tire and rim. (And I always mount tire with the label either the valve or the rim weld. I vacillate between the two, Valve is easier and faster but the label gets dirtier from my hands while pumping and the rim weld location has a long history as that is where tubular tire labels are located. Tugs my heart.)
​​​​​​
Yes, the marks are on both the sides of the tube. This pattern goes on both sides all along the tube, not on a specific spot. No marks on the rims or the tire itself.
alexk_il is offline  
Old 06-26-22, 11:18 AM
  #5  
cyccommute 
Mad bike riding scientist
 
cyccommute's Avatar
 
Join Date: Nov 2004
Location: Denver, CO
Posts: 25,356

Bikes: Some silver ones, a red one, a black and orange one, and a few titanium ones

Mentioned: 137 Post(s)
Tagged: 1 Thread(s)
Quoted: 4916 Post(s)
Liked 2,519 Times in 1,488 Posts
Originally Posted by alexk_il View Post
Just replaced an old tube, noticed a strange crossed pattern. I'm sure it's my fault, but I'm still curious how I caused it? The tube is OK otherwise.
Itís the threads of the tire casing like those below. It looks like you use talc.


It also looks like your tire is a 60 thread per inch (TPI) tire. Low thread count tires can be a problem if one of the threads breaks. The messed up portion of the tire above looks like this from the outside.




The tire had a definite snake belly to it.

__________________
Stuart Black
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Days of Wineless Roads. Bed and Breakfasting along the KATY
Twisting Down the Alley. Misadventures in tornado alley.
cyccommute is offline  
Old 06-26-22, 12:43 PM
  #6  
Bill Kapaun
Really Old Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 13,095

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 1498 Post(s)
Liked 762 Times in 559 Posts
Maybe it's when the slightly undersize tube makes contact with the tire when inflating, it "creeps" a bit and leaves "scuff marks"?
Bill Kapaun is offline  
Old 06-26-22, 03:25 PM
  #7  
wheelreason
Senior Member
 
Join Date: Aug 2009
Posts: 740
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 114 Post(s)
Likes: 0
Liked 16 Times in 12 Posts
That is caused by riding a flat tire.
wheelreason is offline  
Old 06-26-22, 08:16 PM
  #8  
MudPie
Senior Member
 
MudPie's Avatar
 
Join Date: May 2004
Location: Southern California
Posts: 2,125
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 90 Post(s)
Liked 84 Times in 64 Posts
Originally Posted by wheelreason View Post
That is caused by riding a flat tire.
I don't know if this statement is true or not, but based on Occam's Razor, I like this response.
MudPie is offline  
Old 06-26-22, 11:42 PM
  #9  
alexk_il
Junior Member
Thread Starter
 
Join Date: Jun 2022
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked 5 Times in 5 Posts
Originally Posted by wheelreason View Post
That is caused by riding a flat tire.
Don't remember ever riding a flat tire.

​​​​​​I did roll the bike with deflated tires out of my garage this year. Maybe that's it. Strange that this only happened to one tire, the other one didn't have this.

Last edited by alexk_il; 06-27-22 at 03:17 PM.
alexk_il is offline  
Old 06-26-22, 11:46 PM
  #10  
alexk_il
Junior Member
Thread Starter
 
Join Date: Jun 2022
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked 5 Times in 5 Posts
Originally Posted by Bill Kapaun View Post
Maybe it's when the slightly undersize tube makes contact with the tire when inflating, it "creeps" a bit and leaves "scuff marks"?
Also thought about it, I sometimes even hear a popping sound when a new tube untwists itself during inflation in the tire. Maybe that's it.

Last edited by alexk_il; 06-27-22 at 02:48 AM.
alexk_il is offline  
Old 06-27-22, 02:46 AM
  #11  
delbiker1 
Mother Nature's Son
 
delbiker1's Avatar
 
Join Date: Mar 2016
Location: Sussex County, Delaware
Posts: 2,502

Bikes: Early 90's Ochsner road, 2006 Schwinn SS DBX, 2014 Orbea Avant MD30, 2004 Airborne Zeppelin TI, 2003 Lemond Poprad, 1989? Fuji Ace, 2001 Lemond Tourmalet, 2014? Soma Smoothie

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 659 Post(s)
Liked 939 Times in 544 Posts
The popping sound is likely the tire seating in the rim. Why would your tube have to untwist? If it is twisted inside the tire, you have installed it incorrectly.
delbiker1 is offline  
Old 06-27-22, 02:53 AM
  #12  
alexk_il
Junior Member
Thread Starter
 
Join Date: Jun 2022
Posts: 82
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Liked 5 Times in 5 Posts
Originally Posted by delbiker1 View Post
The popping sound is likely the tire seating in the rim. Why would your tube have to untwist? If it is twisted inside the tire, you have installed it incorrectly.
Some tires were/are made by Spanish inquisition to torture those who installs TLRs with normal tubes. Challenge Bianca Pro HTLR is one of these, there is absolutely no easy way to install a non-latex tube without twisting it in a few places. But it's great tire otherwise.

The tube in my photo came off an old Conti Cyclocross tire, I think it was TLR too and I struggled a lot while changing the tubes with it.
alexk_il is offline  
Old 06-27-22, 12:07 PM
  #13  
BCRider
Senior Member
 
BCRider's Avatar
 
Join Date: Mar 2008
Location: The 'Wack, BC, Canada
Posts: 5,541

Bikes: Norco (2), Miyata, Canondale, Soma, Redline

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Liked 41 Times in 31 Posts
Originally Posted by alexk_il View Post
Also thought about it, I sometimes even hear a popping sound when a new tube untwists itself during inflation in the tire. Maybe that's it.
Those are just marks from the texture on the inside of the tire from the cords that cyccommute showed you. Next time you have the tire off look on the inside and you'll see the texture that imprinted itself on the tube.

Keep in mind that as you ride the tire squirms around a little and the tube squirms a little inside the tire as well. Over time if the cords are quite proud on the inside they will micro wear a pattern like this into the surface of the tube. It's nothing you did. It's simply the tire's makeup affecting the tube.
BCRider is offline  
Likes For BCRider:

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 - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.