Advertise on Bikeforums.net



User Tag List

Results 1 to 12 of 12
  1. #1
    yesterday you said tom.
    Join Date
    May 2009
    Location
    Brooklyn, NY
    My Bikes
    Bianchi Pista 07, Dodici Veloce
    Posts
    457
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Chainline issues with Truvativ Omniums?

    I was about to pull the trigger on a Truvativ omnium crankset. However, i did some research and found that some people were having problems achieving a straight chainline. From what I read, the Omniums use a 41mm chainline and the traditional track chainline is what? 42? (correct me if i'm wrong). I apologize about reviving a tired subject, but I need more answers.

    I currently ride a Bianchi Pista with a rear wheel setup that has Dura Ace 7600 hubs (44mm) with a EAI cog. I know having a chainline that's off by 1 or 2 mm is not that big of a deal, but I'm OCD about things being straight.

    Would my setup not be compatible with omniums?

  2. #2
    Yo!
    Yo! is offline
    Senior Member Yo!'s Avatar
    Join Date
    Jun 2009
    Location
    Dallas, TX
    My Bikes
    Panasonic NJS Keirin x2, Level Professional, Bianchi CUSS, GT Pulse
    Posts
    1,047
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I originally bought Omniums to work with one of my Panasonics, and I wasn't able to make it happen.

    First of all, the spider is super burly and I was not able to completely seat the crank before interference with the chainstay occurred.

    Secondly, even with the crank arm seated, my chainline was really out of whack; I was using a formula hub, which advertises a 36mm chainline, which is super tight. My frame supports a 41mm chainline, so even if I got it all said and done I was looking at about a 4-6mm difference, which is way too much for my comfort.

    I eventually returned them and got a SG75 bb with a 109mm spindle.

    I think these cranks are badass, but probably better suited for newer frames. I think that they should probably work out with your Pista. My advice is to search velospace for dudes running omniums on their pista's, get the rear hub info, and there you have your answer.

  3. #3
    * adriano's Avatar
    Join Date
    Nov 2008
    Location
    Baltimore
    My Bikes
    http://velospace.org/node/18951
    Posts
    6,890
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    dont sweat it.

  4. #4
    everyday I'm hustlin' brandonspeck's Avatar
    Join Date
    Aug 2008
    Location
    Portland, OR
    My Bikes
    Surly Crosscheck, Surly Steamrolla
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    sounds like you should be fine. I knew a guy who had that same setup and he was fine.
    "I think it’s dumb when you take the inherently fun like riding bikes and singing songs and say they’re not for everyone as if for your whole life you were cool as $h!t."

    -Bomb the Music Industry!

  5. #5
    Senior Member das_pyrate's Avatar
    Join Date
    May 2009
    Location
    dirty meda
    My Bikes
    EAI Bareknuckle, 1981 Gios Aerodynamic, Giant Boulder
    Posts
    557
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    omniums have a 44mm chainline iirc
    Quote Originally Posted by bhamlax View Post
    I find small children (under 5 works best) to be exceptionally light and very easy to trick.

  6. #6
    Senior Member
    Join Date
    Jul 2008
    Posts
    539
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You recall wrong.

  7. #7
    yesterday you said tom.
    Join Date
    May 2009
    Location
    Brooklyn, NY
    My Bikes
    Bianchi Pista 07, Dodici Veloce
    Posts
    457
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    who's wrong me or das pyrate?

  8. #8
    Senior Member the_don's Avatar
    Join Date
    May 2008
    Location
    Tokyo
    Posts
    1,917
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

  9. #9
    yesterday you said tom.
    Join Date
    May 2009
    Location
    Brooklyn, NY
    My Bikes
    Bianchi Pista 07, Dodici Veloce
    Posts
    457
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    yeah i found that one too. i pmed the dude, awaiting his response. thanks don.

  10. #10
    META Severian's Avatar
    Join Date
    Aug 2005
    Location
    Madison, WI
    My Bikes
    Gary Fisher Aquila (retired), Specialized Allez Sport (in parts), Cannondale R500, HP Velotechnic Street Machine, Dented Blue Fixed Gear (retired), Seven Tsunami SSFG, Specialized Stumpjumper Comp Hardtail (alloy version)
    Posts
    945
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have an Omnium that runs back to a Surly track cog mounted on a Phil Wood. I have no problems with chainline.

  11. #11
    A little North of Hell
    Join Date
    Mar 2006
    Posts
    4,377
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    [SIGPIC][/SIGPIC]
    XXXI

  12. #12
    Member
    Join Date
    Nov 2008
    Posts
    28
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have them on my pista. No difference from stock. I'm running them with a set of Bontrager Wheels, the ones with the low spoke count(20f, 24b).


    just measured it and I'm getting 42mm.
    Last edited by muffdoc; 11-06-09 at 08:58 PM.

Posting Permissions

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