Advertise on Bikeforums.net



User Tag List

Results 1 to 13 of 13
  1. #1
    clydesdale Paul bigpaul652002's Avatar
    Join Date
    Nov 2009
    Posts
    5
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    26" tubes in 29er tires

    one of my weight Winne 29er friends runs 26 tubes in his 29er tires. he said they will stretch enough. I was considering this while i am still my riding my 69er until I finish my surly km. I always bring two tubes so i have been carrying two 26 and two 29.

    talk to you all latter.
    Clydesdale Paul Major Taylor Cycling Club San Diego.com

  2. #2
    Junior Member
    Join Date
    Oct 2009
    Location
    Centralia Washington
    Posts
    18
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sure they'll stretch enough but that doesn't mean it's a good idea.

  3. #3
    Senior Member
    Join Date
    May 2008
    Posts
    409
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    People have been using 26" tubes in 29er tires for years, especially since 29er tubes were often unavailable in stores. Apparently they work fine.

  4. #4
    motovation frankenmike's Avatar
    Join Date
    Jan 2007
    Location
    Dover, NH
    My Bikes
    rigid 29er moto, s-works stumpjumper fsr,black fixie,masi roadbike, ugly old hardrock commuter
    Posts
    1,245
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My pops has been running 26 tubes in his 29er for years, works fine.

  5. #5
    Should be riding Bike Lover's Avatar
    Join Date
    Mar 2006
    Location
    S.E. Michigan
    My Bikes
    C-dale- moutain, Pedal Force RS- Campy Record
    Posts
    1,595
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yep, as a member of the mountain bike patrol, I carry only 26er tubes for both. I know others that have used 26ers for several years in their 29ers. Shouldn't be a problem.

    I think I should temper that with a statement about how I'm not sure about some of the super light 26er tubes, but for standard "run in the bike store and pick whatever they have on the shelf" tubes, there shouldn't be a problem.
    Regret lasts longer than pain
    My LBS:
    http://i103.photobucket.com/albums/m...wneonsmall.jpg

  6. #6
    Former Member
    Join Date
    Feb 2005
    Location
    dropmachine.com
    Posts
    4,062
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Why wouldn't you just use 700C tubes?

    They're stupidly light, available everywhere, and even the correct diameter.

  7. #7
    Senior Member JonnyV's Avatar
    Join Date
    Mar 2006
    Location
    Bellwood, Pa
    My Bikes
    2012 Fuji Altamira 1.0
    Posts
    1,582
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    700c tubes are light enough as is, I wouldn't want to stretch them enough to get the correct pressure in a mountain bike tire...not when 29er tubes are now readily available at any bike shop. There's no need to rig something as simple as a tube for a 29er, just buy the right gear.
    Some people are just like Slinky's. Not really good for anything but they bring a smile to your face when you push them down the stairs.

    2012 Fuji Altamira 1.0

  8. #8
    Senior Member Business810's Avatar
    Join Date
    Jun 2007
    Location
    Pittsburgh, PA
    Posts
    612
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My guess is that, for a spare for a 69er, you could get away with either to just carry one tube. In general, though, I don't see a reason to use the wrong size when the right size is easy to find.

  9. #9
    I'm band already? lubes17319's Avatar
    Join Date
    Jan 2006
    Location
    in a ditch
    My Bikes
    wheels, brakes & bars
    Posts
    1,000
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Put the 26" on in the ease of home, & carry a spare 29" tube..
    Slipping the smaller tube over the bigger rim on trail can sometimes be a bother.
    Who cares what your bike weighs, just ride it!

  10. #10
    M_S
    M_S is offline
    All Mod Cons M_S's Avatar
    Join Date
    Dec 2006
    Location
    Face down in a snowbank
    My Bikes
    K2 Enemey Cyclocross franken build; Redline D660 29er, Volpe SS Cross
    Posts
    3,694
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ghettocruiser View Post
    Why wouldn't you just use 700C tubes?

    They're stupidly light, available everywhere, and even the correct diameter.
    700c tubes don't stretch enough, unless perhaps you run too-high pressure, 26inch tubes do stretch enough, unless they are of the ultralight or whatever variety. Anyways, it sounds like the OP just wants to know if he can carry a single 26inch tube, and the answer is yes. That said I prefer 29er tubes. A little bit easier if you're in a hurry.

  11. #11
    fanatik Speedub.Nate's Avatar
    Join Date
    Mar 2005
    Location
    SF Bay Area, California
    Posts
    413
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The problem with many 700c tubes is with their cross-section diameter. I've found some work, but most either split open along the seam, or failed at the valve stem where the extra rubber couldn't stretch enough to fill the tire.

    But that said, I've never had a problem with 2.2-2.5" 26-inch tubes. They're great if you have bikes (or friends) with different wheel sizes.

  12. #12
    Former Member
    Join Date
    Feb 2005
    Location
    dropmachine.com
    Posts
    4,062
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by M_S View Post
    700c tubes don't stretch enough, unless perhaps you run too-high pressure,
    I've never tried this so I'll have to take your word for it, but I see 700c tubes in 30c and 40c sizes that are pretty close to 29er diameters.

  13. #13
    Senior Member
    Join Date
    Aug 2007
    Posts
    511
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Watch out, the chance of catching the tube under the bead is much higher if you use a tube with insufficient external. It will become an excercise in "stuffing".

    Having said that, it's better to use a 26x2.1"(ish) tube than a 700x32-40 (ish) tube. They stretch much better along the their length than in internal diameter. And ... you're risking bursting a seam which run along the length of the tube. Finally, you can actually "pre-stretch" a tube of smaller external diameter by over inflating it well over you're desired size. Leave it that way for a day or two, than deflate. The resulting tube will be easier to mount.
    Last edited by BearSquirrel; 12-05-09 at 04:40 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
  •