Go Back  Bike Forums > Bike Forums > General Cycling Discussion
Reload this Page >

This inner tube is close enough in size right?

Notices
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!

This inner tube is close enough in size right?

Old 08-01-20, 04:35 PM
  #1  
prime winner
Senior Member
Thread Starter
 
Join Date: Apr 2014
Location: North East Florida
Posts: 95

Bikes: 2019 Giant Simple, 2020 Giant Talon 29 2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked 0 Times in 0 Posts
This inner tube is close enough in size right?

I went to go for a ride this morning and realized I had a flat. I had just rode a 10 mile neighborhood ride two days ago, but something got me without me noticing it and the tire was completely flat. I thought I had a spare tube, but not even close in size, my flat tube was a 29 x 1.9 - 2.35. I went to the Giant dealer that I bought the bike from and they said they did not have my size, so I went to another dealer (Trek). The guy brought out a Bontrager 29 x 1.75 - 2.125 and said it should work, so I bought two.

So it's a 29 x 1.75 - 2.125 close enough to my original size of 29 x 1.9 - 2.35. My tire shows 29 x 2.20 on the side.

Thanks in advance!
prime winner is offline  
Old 08-01-20, 04:56 PM
  #2  
kevrider
Senior Member
 
kevrider's Avatar
 
Join Date: Jan 2011
Location: northern nevada
Posts: 359

Bikes: way too many

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
Liked 4 Times in 2 Posts
i'd use it and wouldn't lose any sleep over it.
kevrider is offline  
Likes For kevrider:
Old 08-01-20, 06:10 PM
  #3  
prime winner
Senior Member
Thread Starter
 
Join Date: Apr 2014
Location: North East Florida
Posts: 95

Bikes: 2019 Giant Simple, 2020 Giant Talon 29 2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked 0 Times in 0 Posts
Originally Posted by kevrider View Post
i'd use it and wouldn't lose any sleep over it.
Thanks kev, I'll roll with it
prime winner is offline  
Old 08-01-20, 07:27 PM
  #4  
AnthonyG
Senior Member
 
AnthonyG's Avatar
 
Join Date: May 2005
Location: Queanbeyan, Australia.
Posts: 3,967
Mentioned: 58 Post(s)
Tagged: 0 Thread(s)
Quoted: 2308 Post(s)
Liked 136 Times in 100 Posts
Going a "little" bit smaller in tube size is OK. The tube will inflate to fill the void although there are limits.
Going larger in tube size however is a problem as the tube is likely to kink and wont fill the void evenly.
AnthonyG is offline  
Old 08-01-20, 08:03 PM
  #5  
wolfchild
Senior Member
 
wolfchild's Avatar
 
Join Date: Feb 2008
Location: Mississauga/Toronto, Ontario canada
Posts: 6,183

Bikes: I have 3 singlespeed/fixed gear bikes

Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 1802 Post(s)
Liked 449 Times in 243 Posts
It's ok to use a smaller tube. It will stretch and fill the tire up. I've used 700x32 mm tubes inside 700x45mm tires without any problems.
wolfchild is offline  
Old 08-01-20, 10:31 PM
  #6  
katsup
Senior Member
 
katsup's Avatar
 
Join Date: May 2016
Location: Southern California
Posts: 1,238

Bikes: Soma Fog Cutter & Vintage Mountain Bikes

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 415 Post(s)
Liked 233 Times in 136 Posts
I use "close enough" size tubes in tires all the time.

Last edited by katsup; 08-02-20 at 05:25 PM.
katsup is offline  
Old 08-02-20, 09:13 AM
  #7  
wphamilton
Senior Member
 
wphamilton's Avatar
 
Join Date: Apr 2011
Location: Alpharetta, GA
Posts: 15,001

Bikes: Nashbar Road

Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quoted: 2788 Post(s)
Liked 174 Times in 122 Posts
No problem with a slightly small inner tube.

Even with too large a tube it still works fine. Air pressure will be equalized regardless of folds and kinks, but if it is folded the crease may eventually wear cause a flat.
wphamilton is offline  
Old 08-02-20, 04:53 PM
  #8  
prime winner
Senior Member
Thread Starter
 
Join Date: Apr 2014
Location: North East Florida
Posts: 95

Bikes: 2019 Giant Simple, 2020 Giant Talon 29 2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked 0 Times in 0 Posts
I checked the tire and didn't see a hole so there's a win. When I was airing up the new tube I heard two seperately pops after 45 psi. Is that the sound of the beads snapping on the rim?
prime winner is offline  
Old 08-02-20, 08:30 PM
  #9  
Kapusta
Cyclochondriac
 
Join Date: Feb 2017
Posts: 3,256
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 1392 Post(s)
Liked 556 Times in 350 Posts
Originally Posted by prime winner View Post
I checked the tire and didn't see a hole so there's a win. When I was airing up the new tube I heard two seperately pops after 45 psi. Is that the sound of the beads snapping on the rim?
That pop would be normal and is what you guessed it was.

A deafening boom would be something different.

As far as sizing the tube.... go by the size of the actual tire, not the tube that was in it.
Kapusta is offline  
Old 08-03-20, 09:32 AM
  #10  
prime winner
Senior Member
Thread Starter
 
Join Date: Apr 2014
Location: North East Florida
Posts: 95

Bikes: 2019 Giant Simple, 2020 Giant Talon 29 2

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked 0 Times in 0 Posts
Originally Posted by Kapusta View Post
That pop would be normal and is what you guessed it was.

A deafening boom would be something different.

As far as sizing the tube.... go by the size of the actual tire, not the tube that was in it.

Thanks Kapusta, and everyone that had input, I appreciate everyone's help!
prime winner is offline  
Old 08-03-20, 09:39 AM
  #11  
Kapusta
Cyclochondriac
 
Join Date: Feb 2017
Posts: 3,256
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 1392 Post(s)
Liked 556 Times in 350 Posts
Originally Posted by prime winner View Post
So it's a 29 x 1.75 - 2.125 close enough to my original size of 29 x 1.9 - 2.35. My tire shows 29 x 2.20 on the side.
It kind of cracks me up that something as forgiving as the high limit of a tube is specified to 3 decimal places.
Kapusta is offline  

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