28 tubes
Results 1 to 18 of 18

Thread: 28 tubes

  1. #1
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2013
    Posts
    4,153

    28 tubes

    How is the luck with running a 20-25 tube in a 28 tire?
    ... also what is the deal with all the removable valve stems, almost no standard stems available. I'm progressing to a threaded co2 inflator, the dam removable stem comes out when you unthread it.

    Is there a shortage due to the cov19?
    Last edited by duriel; 2 Weeks Ago at 12:56 PM.
    BANNED

  2. #2
    'brifter' is f'ing stupid
    Reputation: cxwrench's Avatar
    Join Date
    Nov 2004
    Posts
    15,147
    They'll work. Tighten the valve up, my Lezyne pump unscrews maybe 1 valve a year.
    #promechaniclife

  3. #3
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2013
    Posts
    4,153
    ... so 25 tubes are ok in a 28?
    BANNED

  4. #4
    tlg
    tlg is offline
    RoadBikeReview Member
    Reputation: tlg's Avatar
    Join Date
    May 2011
    Posts
    16,847
    Quote Originally Posted by duriel View Post
    I'm progressing to a threaded co2 inflator, the dam removable stem comes out when you unthread it.
    If you don't need them removable, put a dab of glue or loctite on them.

    Quote Originally Posted by duriel View Post
    ... so 25 tubes are ok in a 28?
    Yea no problem. Ever blow up a tube outside of the tire? It easily grows 1/8".
    Custom Di2 & Garmin/GoPro mounts 2013 SuperSix EVO Hi-MOD Team * 2004 Klein Aura V

  5. #5
    'brifter' is f'ing stupid
    Reputation: cxwrench's Avatar
    Join Date
    Nov 2004
    Posts
    15,147
    Quote Originally Posted by duriel View Post
    ... so 25 tubes are ok in a 28?
    It's 3mm...seriously, you don't think it'll handle stretching 3mm?
    #promechaniclife

  6. #6
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2002
    Posts
    21,325
    Quote Originally Posted by duriel View Post
    the dam removable stem comes out when you unthread it.
    It's terrible when the dam breaks. Big flood for those living downstream.

  7. #7
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2010
    Posts
    9,501
    I use 23mm tubes in 33mm tires. 25 in 28 is a total non issue.

  8. #8
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2013
    Posts
    4,153
    ... it does stretch the rubber a little more. First tube purchase in years... I was a little concerned, a little, nothing wrong with checking with the experts!

    Well when your on the side of the road and the removable stem comes out, and you don't have pliers, and you don't have another tube, yes it is a dam brake! woops!
    BANNED

  9. #9
    Banned Sock Puppet
    Reputation: Lombard's Avatar
    Join Date
    May 2014
    Posts
    11,404
    Quote Originally Posted by tlg View Post
    Yea no problem. Ever blow up a tube outside of the tire? It easily grows 1/8".
    It grows WAY more than 1/8". Once just for shytes and giggles, I pumped up a tube until it popped. The diameter of that thing was at least 4 inches before it popped.

    Think of it as a budget light weight tube.
    "COMPLACENCY IS LETHAL - VOTE in November." - System Shock.

    "With
    bicycles in particular, you need to separate between what's merely true and what's important."
    -- DCGriz, RBR.





  10. #10
    RoadBikeReview Member
    Reputation:
    Join Date
    Sep 2005
    Posts
    1,238
    Agree using slightly undersized tube is no problem.

    OTOH- Using an oversized tube is just a sh%t waiting to happen.

  11. #11
    tlg
    tlg is offline
    RoadBikeReview Member
    Reputation: tlg's Avatar
    Join Date
    May 2011
    Posts
    16,847
    Quote Originally Posted by Lombard View Post
    It grows WAY more than 1/8". Once just for shytes and giggles, I pumped up a tube until it popped. The diameter of that thing was at least 4 inches before it popped.

    Think of it as a budget light weight tube.
    Like this
    Custom Di2 & Garmin/GoPro mounts 2013 SuperSix EVO Hi-MOD Team * 2004 Klein Aura V

  12. #12
    RoadBikeReview Member
    Reputation:
    Join Date
    Oct 2013
    Posts
    4,153
    OK guys, give it up.
    The smaller tube can be blown up, but the walls of the tube get thinner and the stress goes higher too!
    Ever pop a balloon with a pin, doesn't take much pressure. Try popping the balloon when it only has about 1/12 that full size. Hopefully your pea brains will figure out the just of my question.

    Now that guy has a big wheel!
    BANNED

  13. #13
    'brifter' is f'ing stupid
    Reputation: cxwrench's Avatar
    Join Date
    Nov 2004
    Posts
    15,147
    Quote Originally Posted by duriel View Post
    OK guys, give it up.
    The smaller tube can be blown up, but the walls of the tube get thinner and the stress goes higher too!
    Ever pop a balloon with a pin, doesn't take much pressure. Try popping the balloon when it only has about 1/12 that full size. Hopefully your pea brains will figure out the gist of my question.

    Now that guy has a big wheel!
    Quote Originally Posted by duriel View Post
    ... it does stretch the rubber a little more. First tube purchase in years... I was a little concerned, a little, nothing wrong with checking with the experts!

    Well when you're on the side of the road and the removable stem comes out, and you don't have pliers, and you don't have another tube, yes it is a dam brake! woops!
    ftfy...
    #promechaniclife

  14. #14
    RoadBikeReview Member
    Reputation:
    Join Date
    Feb 2002
    Posts
    21,325
    Quote Originally Posted by duriel View Post
    ... so 25 tubes are ok in a 28?
    At MOST you would experience slightly faster pressure loss because the tube is nominally 12% thinner compared to a 25. And just so you don't go extrapolating incorrectly, that does NOT mean 12% faster air loss. And even if it did, in my case that would mean a loss of about 8 psi per week instead of the about 7 psi per week loss I experience now.

  15. #15
    RoadBikeReview Member
    Reputation: ogre's Avatar
    Join Date
    Dec 2005
    Posts
    1,162
    Quote Originally Posted by duriel View Post
    Now that guy has a big wheel!
    I guess you’re not aware that 48ers are the next big thing with MTBers.

  16. #16
    Banned Sock Puppet
    Reputation: Lombard's Avatar
    Join Date
    May 2014
    Posts
    11,404
    Quote Originally Posted by tlg View Post
    Like this
    Yep! It was fun picking up pieces of butyl rubber all over my livingroom. A $7 cheap thrill.

    Quote Originally Posted by duriel View Post
    OK guys, give it up.
    The smaller tube can be blown up, but the walls of the tube get thinner and the stress goes higher too!
    Ever pop a balloon with a pin, doesn't take much pressure. Try popping the balloon when it only has about 1/12 that full size. Hopefully your pea brains will figure out the just of my question.
    Pea brains? That's pretty harsh for a flawed analogy, don't you think? The balloon analogy is hardly valid for blowing up a tube in a 28mm tire that is rated for a 20-25mm tire. As I said before, what do you think a "lightweight" tube is?
    "COMPLACENCY IS LETHAL - VOTE in November." - System Shock.

    "With
    bicycles in particular, you need to separate between what's merely true and what's important."
    -- DCGriz, RBR.





  17. #17
    RoadBikeReview Member
    Reputation:
    Join Date
    May 2010
    Posts
    9,501
    Quote Originally Posted by duriel View Post
    OK guys, give it up.
    The smaller tube can be blown up, but the walls of the tube get thinner and the stress goes higher too!
    Ever pop a balloon with a pin, doesn't take much pressure. Try popping the balloon when it only has about 1/12 that full size. Hopefully your pea brains will figure out the just of my question.

    Now that guy has a big wheel!
    okay, that's settled. Not sure why someone with all the answers already would ask a bunch of pea brains for an answer but whatever.

  18. #18
    Banned Sock Puppet
    Reputation: Lombard's Avatar
    Join Date
    May 2014
    Posts
    11,404
    Quote Originally Posted by Jay Strongbow View Post
    okay, that's settled. Not sure why someone with all the answers already would ask a bunch of pea brains for an answer but whatever.
    You must spread some Reputation around before giving it to Jay Strongbow again.


    "COMPLACENCY IS LETHAL - VOTE in November." - System Shock.

    "With
    bicycles in particular, you need to separate between what's merely true and what's important."
    -- DCGriz, RBR.





Similar Threads

  1. Tubes, Tubes, Tubes, there is a difference
    By Mr645 in forum Wheels and Tires
    Replies: 25
    Last Post: 10-06-2014, 08:26 PM
  2. Tube Question: what does 20/28 and 28/38 mean?
    By cjo in forum Wheels and Tires
    Replies: 5
    Last Post: 03-16-2009, 05:26 PM
  3. Tunnel closure for 8/28-9/28
    By hdnoise in forum Northern California
    Replies: 4
    Last Post: 08-24-2007, 10:03 PM
  4. Nice light clincher rims for retro project 28/28
    By DannyBoy in forum Retro-Classic
    Replies: 3
    Last Post: 04-24-2007, 06:19 AM
  5. Looking for 28/28 10 speed Campy Record Hubset
    By DannyBoy in forum Components, Wrenching
    Replies: 1
    Last Post: 03-31-2007, 05:00 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT ROADBIKEREVIEW

VISIT US AT

© Copyright 2020 VerticalScope Inc. All rights reserved.