Quantcast

Thoughts on two-tube setup?

Discussion in 'The Lounge' started by hokie77, Mar 7, 2008.

  1. hokie77

    hokie77 Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Dec 5, 2007
    Messages:
    60
    Location:
    Virginia
    I was thinking about running two ultralite tubes this season and was wondering what everyone's thoughts were. I'm between running diy tubeless and two tubes. A guy on Instructables did this with a commuter bike so this plan isn't to my credit. I'd drill another hole in the rim for another presta valve. One tube would be empty and the other inflated. In the event of a flat, simply hop off bike, finish deflating the flat tube and hook CO2 up to the spare. You'd never have to take the wheel off and could keep you in a race that would otherwise be lost. The drawbacks would be the weight of the extra tube, (I wonder if running the extralite tubes would cause much more frequent flats), and the cost of the light tubes. The hole would be negligible as trials bikes have drilled rims frequently and seem to be strong enough. I'd be racing XC in Southwest Virginia.
     
    #1 -   Mar 7, 2008

    Please register to disable this ad.

  2. loco-gringo

    loco-gringo Crusading Clamp Monkey

    Rep/Likes:
    5 / 5
    Joined:
    Sep 27, 2006
    Messages:
    8,894
    Location:
    Deep in the heart of TEXAS
    Just see if stinky will give you one of the bongs.
     
    #2 -   Mar 7, 2008
  3. BurlyShirley

    BurlyShirley Rex Grossman Will Rise Again

    Rep/Likes:
    6 / 1
    Joined:
    Jul 4, 2002
    Messages:
    19,210
    Location:
    TN
    I think a two-tube set up would be good if you just put one tube in the rear tire and one in the front. :biggrin:

    Nice idea though.
     
    #3 -   Mar 7, 2008
  4. DRB

    DRB unemployed bum

    Rep/Likes:
    5 / 0
    Joined:
    Oct 24, 2002
    Messages:
    15,287
    Location:
    Watchin' you. Writing it all down.
    PM Westy where you live. He'll be over shortly to discuss this matter with you.
     
    #4 -   Mar 7, 2008
  5. kingbee

    kingbee Monkey

    Rep/Likes:
    6 / 0
    Joined:
    Mar 29, 2004
    Messages:
    902
    Location:
    Ohio
    Rather than go through all that trouble, just get Stans.

    My luck the deflated tube would have a flat when I go to fill it up.
     
    #5 -   Mar 7, 2008
  6. hokie77

    hokie77 Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Dec 5, 2007
    Messages:
    60
    Location:
    Virginia
    That's how I came up with this plan. :busted:
     
    #6 -   Mar 7, 2008
  7. hokie77

    hokie77 Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Dec 5, 2007
    Messages:
    60
    Location:
    Virginia
    I'll take that as one vote against? Maybe a couple votes against?
     
    #7 -   Mar 7, 2008
  8. Red Rabbit

    Red Rabbit Picky Pooper

    Rep/Likes:
    0 / 0
    Joined:
    Jan 27, 2007
    Messages:
    2,718
    Location:
    Colorado
    If you do try it, make sure you do it on a thrift store bike first. Run over some goat head thorns or something.
     
    #8 -   Mar 7, 2008
  9. stinkyboy

    stinkyboy Plastic Santa

    Rep/Likes:
    1 / 0
    Joined:
    Jan 6, 2005
    Messages:
    15,195
    Location:
    ¬°Phoenix!
    What is going on here?!
     
    #9 -   Mar 7, 2008
  10. BurlyShirley

    BurlyShirley Rex Grossman Will Rise Again

    Rep/Likes:
    6 / 1
    Joined:
    Jul 4, 2002
    Messages:
    19,210
    Location:
    TN
    Bicycle talk. Startling I know.
     
  11. ito

    ito Mr. Schwinn Effing Armstrong

    Rep/Likes:
    4 / 0
    Joined:
    Oct 3, 2003
    Messages:
    1,709
    Location:
    Avoiding the nine to five
    :stupid:

    Run enough pressure that you don't get pinchflats and stop worrying about it. The chances of a thorn popping one tube and not the other seem pretty slim. I'd run Stans or a Kevlar Belt on the outside of the tube before I ran two tubes. Both would be lighter and more reliable.
     
  12. binary visions

    binary visions The voice of reason

    Rep/Likes:
    83 / 361
    Joined:
    Jun 13, 2002
    Messages:
    21,641
    Location:
    NC
    Wouldn't the fact that one of the tubes has to wrap around the other tube's valve stem significantly increase your chance of flatting?
     
  13. eaterofdog

    eaterofdog ass grabber

    Rep/Likes:
    12 / 22
    Joined:
    Sep 8, 2006
    Messages:
    6,914
    Location:
    Central Florida
    In the Old West, cowboys would kill rattlesnakes and stuff them in the tires when they got flats. (True story.) I think I'm cool cause I ride 2 miles into the woods. I ought to try riding across 50 miles of desert on a safety bicycle, in cowboy boots, on dead rattlesnakes.

    This has absolutely nothing to do with this thread. I am just diluting the knowledge with trivia.
     
  14. kidwoo

    kidwoo Celebrating No-Pants Day

    Rep/Likes:
    161 / 1,530
    Joined:
    Aug 25, 2003
    Messages:
    21,785
    Location:
    In my pants
    What's even funnier is that the guy who started this system never realized that if you're going to pinch an inflated tube, the uninflated one is much more likely to get pinched and split too.
     
  15. hokie77

    hokie77 Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Dec 5, 2007
    Messages:
    60
    Location:
    Virginia
    Both good points, that's why I figured I'd ask for opinions before drilling any holes. I have to think about something like that for a while before performing irreversible work. I'm thinking the tubeless may be the better idea. Anyone use the system on the net which uses 20" BMX tubes and latex? Or should I bite the bullet and accept the fact that I'm gonna have to wait on shipping?
     
  16. hokie77

    hokie77 Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Dec 5, 2007
    Messages:
    60
    Location:
    Virginia
    Obviously, the guy using it has no problems for his uses. Whether it's acceptable for mtn biking and racing is a completely different matter.
     
  17. ito

    ito Mr. Schwinn Effing Armstrong

    Rep/Likes:
    4 / 0
    Joined:
    Oct 3, 2003
    Messages:
    1,709
    Location:
    Avoiding the nine to five
    I've used it and it works well, though can be difficult to setup. It is also almost impossible to effectively change out your tires, hence the reason I've never considered it for the long run. But if you want tubeless and you have the time to set it up it is a very cheap DIY.
     
  18. Westy

    Westy the teste

    Rep/Likes:
    446 / 2,841
    Joined:
    Nov 22, 2002
    Messages:
    36,191
    Location:
    Sleazattle
    If you are riding in the rocky area's I think you are I'd run a Stan's setup with real tubeless tires. The most likely cause of a flat will be pinchflat and having the sidewall torn open so you will want a sturdy tire.
     
  19. hokie77

    hokie77 Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Dec 5, 2007
    Messages:
    60
    Location:
    Virginia
    Thanks Westy. I just don't want to spend a lot of time on the side of the trail in a race. I'll take your advice on the setup.
     
  20. splat

    splat Nam I am

    Rep/Likes:
    8 / 78
    Joined:
    Apr 27, 2002
    Messages:
    14,687
    Location:
    Well Maybe Windows is Bearable ! Unix Rules !
    why not just use a Mr Tuffy ?

     
  21. Westy

    Westy the teste

    Rep/Likes:
    446 / 2,841
    Joined:
    Nov 22, 2002
    Messages:
    36,191
    Location:
    Sleazattle

    If your racing you don't want to deal with the extra rolling resistance.
     
  22. GotMyGED

    GotMyGED Monkey

    Rep/Likes:
    4 / 0
    Joined:
    Mar 29, 2006
    Messages:
    187
    Location:
    Knoxville
    Why not try the original tubless system, before all these sealers, slimes, and UL tubeless tires came out?

    I run a UST tire, A UST Rim/Rimstrip, and no tube or sealer.

    I have never had a flat, and the tires are tough enough that most things can't puncture them. However, I have never ran less than 35 lbs of pressure and I only weigh 145.
     
  23. kingbee

    kingbee Monkey

    Rep/Likes:
    6 / 0
    Joined:
    Mar 29, 2004
    Messages:
    902
    Location:
    Ohio
    If you're desperate enough to bike around with 4 tubes in your tires...its a better option.
     
  24. kidwoo

    kidwoo Celebrating No-Pants Day

    Rep/Likes:
    161 / 1,530
    Joined:
    Aug 25, 2003
    Messages:
    21,785
    Location:
    In my pants
    Not so obvious to me, I don't know the guy.

    I also don't know if he's actually gotten a flat and had this work yet.
     
  25. buildyourown

    buildyourown Turbo Monkey

    Rep/Likes:
    0 / 0
    Joined:
    Feb 9, 2004
    Messages:
    4,857
    Location:
    South Seattle
     
  26. Dartman

    Dartman Old Bastard Mike

    Rep/Likes:
    5 / 0
    Joined:
    Feb 26, 2003
    Messages:
    3,919
    Location:
    Richmond, VA
    Learn to ride light and don't flat.
     
  27. AngryMetalsmith

    AngryMetalsmith Business is good, thanks for asking

    Rep/Likes:
    316 / 1,960
    Joined:
    Jun 4, 2006
    Messages:
    14,145
    Location:
    I have no idea where I am
    If you're racing xc:

    1. Run enough psi. so you don't get pinch flats.

    2. Learn to ride smooth and or pick better lines.

    3. You should be able to change a tube in under 2 minutes. If you can't, then practice.
     
  28. caputo1989

    caputo1989 Turbo Monkey

    Rep/Likes:
    4 / 0
    Joined:
    Oct 3, 2004
    Messages:
    2,259
    Location:
    Too many Tourists COLORADO the place being taken o
    ^^^^^ Either one is fine^^^^^^
     
  29. MTBstud12

    MTBstud12 Monkey

    Rep/Likes:
    5 / 0
    Joined:
    Jan 24, 2008
    Messages:
    484
    Location:
    Tejas
    SO they say double bagging it is a bad idea due to "friction".... might this have the same probelmo... juusssttt a thought
     
  30. johnbryanpeters

    Rep/Likes:
    245 / 2,728
    Joined:
    Sep 27, 2001
    Messages:
    25,016
    Location:
    Making moss sad in New Haven, Vermont
    Just try it. It'll work or it won't. Please report results.
     
  31. splat

    splat Nam I am

    Rep/Likes:
    8 / 78
    Joined:
    Apr 27, 2002
    Messages:
    14,687
    Location:
    Well Maybe Windows is Bearable ! Unix Rules !
    Thats what I was thinking.

    I have ofent wondered if you could just fill a tire with expanding foam and leave it at that.

     
  32. johnbryanpeters

    Rep/Likes:
    245 / 2,728
    Joined:
    Sep 27, 2001
    Messages:
    25,016
    Location:
    Making moss sad in New Haven, Vermont
    I want to see you try to change it when the tread wears out.
     
  33. BMXman

    BMXman I wish I was Canadian

    Rep/Likes:
    6 / 0
    Joined:
    Sep 8, 2001
    Messages:
    13,854
    Location:
    Victoria, BC
    I agree...and if not then go with the UST system....D
     
  34. splat

    splat Nam I am

    Rep/Likes:
    8 / 78
    Joined:
    Apr 27, 2002
    Messages:
    14,687
    Location:
    Well Maybe Windows is Bearable ! Unix Rules !
    I never said it was good idea!!
     
  35. DirtyMike

    DirtyMike Turbo Fluffer

    Rep/Likes:
    59 / 709
    Joined:
    Aug 8, 2005
    Messages:
    14,153
    Location:
    My own world inside my head
    Serious thought, Instead of trying to run two tubes in one wheel adding weight, or running Some tuffies, and adding weight..... Why not run slimelite tubes with proper inflation.
     
  36. hokie77

    hokie77 Chimp

    Rep/Likes:
    0 / 0
    Joined:
    Dec 5, 2007
    Messages:
    60
    Location:
    Virginia
    Alright, just got off work. I figure I'll try the ghetto tubeless using Stan's and for curiosity sake, I may try running double tubes on some cheapo rims just to see what happens. I've got two months before first race so I can iron out any bugs. I'll definitely let everyone know what happens with the double tubes. Thanks for the input, that's what I was looking for and some people mentioned some drawbacks that I didn't even think of. Thanks again.
     
  37. zahgurim

    zahgurim Underwater monkey

    Rep/Likes:
    7 / 12
    Joined:
    Mar 9, 2005
    Messages:
    1,101
    Location:
    lolAsia
    If the tire's dead anyway, you could just cut it off!

    Would be funny to see somebody try that stuff...
     
  38. HAB

    HAB Chelsea from Seattle

    Rep/Likes:
    81 / 808
    Joined:
    Apr 28, 2007
    Messages:
    10,470
    Location:
    Seattle
    I've done well with 20" tube ghetto tubeless. Just use the Stan's fluid, and 20" tubes with removable valve cores. That makes adding extra fluid way easier.