Advertise on Bikeforums.net



User Tag List

Results 1 to 21 of 21

Thread: R.I.P My bike

  1. #1
    thismachinekillsfascists
    Join Date
    Nov 2005
    Location
    Allston, MA
    My Bikes
    http://fixedgeargallery.com/2005/oct/JeffreyKelley.htm
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    R.I.P My bike

    While installing my new pedals (one of my old ones tore apart), like an idiot, I cross-threaded the left crank. It was overwhelmingly stupid; I have a Thompsen bottom bracket, and they haven't made those in what, 40 years? After checking with Bicycle Bill's and Bikes Not Bombs, I officially have to declare my darling Naomi out of commission.

    Seeing as how I'm nearly broke, I'll hopefully find another decent three-speed frame so I can transfer the 650A wheels over.

    A moment of silence, please.

  2. #2
    Senior Member soyboy's Avatar
    Join Date
    Aug 2005
    Location
    brooklyn
    My Bikes
    raleigh gran prix converted to fixed
    Posts
    941
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    wait is bikes not bombs a real thing? i've been working on starting a non profit by that name...damn i guess it was too good of a name not to be used already

  3. #3
    thismachinekillsfascists
    Join Date
    Nov 2005
    Location
    Allston, MA
    My Bikes
    http://fixedgeargallery.com/2005/oct/JeffreyKelley.htm
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

  4. #4
    Senior Member
    Join Date
    Jan 2006
    Location
    Austin TX
    Posts
    455
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    yeah but in Austin it isn't much compared to the successful bikes Across Borders.

    still, they provide alot of cheap bike parts.

  5. #5
    Cornucopia of Awesomeness baxtefer's Avatar
    Join Date
    Oct 2004
    Location
    not where i used to be
    Posts
    4,849
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    it might be salvagable.

    have you tried chasing the threads? sometimes this works
    if that doesn't you could drill out the hole and install a helicoil.
    {o,o**
    |)__)
    -"-"-

    O RLY?

  6. #6
    PS NOT STOLEN Mouton's Avatar
    Join Date
    Oct 2004
    Location
    San Francisco, CA
    My Bikes
    57cm NJS Bridgestone
    Posts
    631
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What happened to replacing your cranks and bottom bracket instead of throwing your whole frame out?

  7. #7
    Senior Member
    Join Date
    Oct 2005
    Location
    Seattle, WA
    Posts
    479
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I obviously don't know enough about bike maintenace. How does one ruin a bottom bracket shell while replacing a pedal?

  8. #8
    mrme Kellan's Avatar
    Join Date
    Dec 2005
    Location
    NEDC
    Posts
    45
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I think his BB might be unique in size and threading (is it an Ashtabula?), however, there might be an adapter of some sort. Check with Sheldon, perhaps. A quick scan of his page didn't bring anything up, but that doesn't mean there's nothing, hopefully. It would seem possible that other bikes of the era used interchangeable one piece cranks.
    Last edited by Kellan; 02-17-06 at 05:53 PM.

  9. #9
    best-dressed mess gnatthew's Avatar
    Join Date
    Oct 2004
    Location
    SF -> BK
    My Bikes
    2 Unicycles duct taped together
    Posts
    305
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Worse comes to abosolute worse you can use a non-threaded compression bottom bracket.


    http://www.bikepro.com/products/bott...ets/mavic.html

  10. #10
    !Newbie, !Senior Member SyntaxPC's Avatar
    Join Date
    May 2004
    Location
    Philadelphia, PA
    My Bikes
    IRO Mark V Track Bike, 1976 Schwinn Sprint Fixed Gear Conversion, 1975 Alan Aluminum Lugged Road Bike, Cannondale Touring, GanWell Road
    Posts
    246
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by caveat audiens
    I have a Thompsen bottom bracket, and they haven't made those in what, 40 years? After checking with Bicycle Bill's and Bikes Not Bombs, I officially have to declare my darling Naomi out of commission.
    Before you give up, try and see if Via Bicycle have the parts you need.

  11. #11
    mrme Kellan's Avatar
    Join Date
    Dec 2005
    Location
    NEDC
    Posts
    45
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Actually, I did a little more research, and Thompson is neither one piece or Ashtabula, however, it's still likely that you can find something that'll work. gatthew's suggestion is one possibility.

  12. #12
    mrme Kellan's Avatar
    Join Date
    Dec 2005
    Location
    NEDC
    Posts
    45
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The left (non-drive side) crank is removable, right? So all you're really looking for is the left crank arm. That should be possible to find. Lots of old bike parts out there among vintage enthusiasts.

  13. #13
    Free Loader CF4L's Avatar
    Join Date
    Dec 2004
    Location
    albany.ny.
    My Bikes
    Trash... for serious.
    Posts
    407
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    is there room to put a helicoil in? you may be able to drill out the hole, retap with the helicoil size and then have the same pedal threading. check it out if youre not used to working with these. I imagine a machine shop could do it for you for cheap.


  14. #14
    Senior Member
    Join Date
    Oct 2005
    Location
    Seattle, WA
    Posts
    479
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Kellan
    I think his BB might be unique in size and threading (is it an Ashtabula?), however, there might be an adapter of some sort. Check with Sheldon, perhaps. A quick scan of his page didn't bring anything up, but that doesn't mean there's nothing, hopefully. It would seem possible that other bikes of the era used interchangeable one piece cranks.
    Ah, I see now.

    I'd def. try some of the other options before tossing the frame.

  15. #15
    Senior Member
    Join Date
    Sep 2002
    Location
    by a big river
    Posts
    2,459
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Way to help kids!

  16. #16
    thismachinekillsfascists
    Join Date
    Nov 2005
    Location
    Allston, MA
    My Bikes
    http://fixedgeargallery.com/2005/oct/JeffreyKelley.htm
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hey, thanks for all the good ideas.

    About Helicoiling: would that be strong enough to be reliable? I mean, if I'm sprinting down a busy road, I don't want my pedal breaking out...

  17. #17
    Free Loader CF4L's Avatar
    Join Date
    Dec 2004
    Location
    albany.ny.
    My Bikes
    Trash... for serious.
    Posts
    407
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    helicoiling is very strong if done correctly. if the cranks are Aluminum (it seems as though they may be steel) you are really just increasing the size of the steel threads, which is stronger. but yea, either way helicoils or anything like that is very stong and reliable if done correctly. You can also add just a little bit of loctite to the insert so that you are sure only the pedal comes out when removing them.

    the "kit" is kinda pricy sometime, so try to find someone that has the tap and stuff already cause an insert is only a buck or two

  18. #18
    atom smasher pjay's Avatar
    Join Date
    Jul 2005
    Location
    kittery me
    My Bikes
    univega fixie road convo
    Posts
    84
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What about the "lefty tighty righty loosy" aspect of pedal threading? can a machine shop do that?

    I ask because I have a pedal threading that got pretty messed up from frequently switching pedal sets, and when it goes I'd like to save my cranks if possible.

  19. #19
    LF for the accentdeprived
    Join Date
    May 2005
    Location
    Budapest, Hungary
    Posts
    3,550
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    BTW, what's that bike setup like? Oddball BB thread and oddball BB/crank interface and so no way of replacing the cranks?
    Quote Originally Posted by dutret
    Do you deny that you are clueless or do you just think that "moron" didn't need to be tacked on there?
    Bike on flickr and on FGG

  20. #20
    thismachinekillsfascists
    Join Date
    Nov 2005
    Location
    Allston, MA
    My Bikes
    http://fixedgeargallery.com/2005/oct/JeffreyKelley.htm
    Posts
    25
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah, the bottom bracket has no threads, just cups pressed into the shell. The axle/right crank/chainwheel are all one piece, and the left side of the axle is threaded for a cone that holds the whole thing on. The left crank attatches via a cotter pin - but apparently, it's a strange size so I couldn't just use a Raleigh left cottered crank or anything.

    I think I'm going to start calling machine shops around here and see about helicoiling.

    (Damn, I wish I got that $25 Paramount that was on craigslist yesterday... That would've solved all my problems!)

  21. #21
    Cornucopia of Awesomeness baxtefer's Avatar
    Join Date
    Oct 2004
    Location
    not where i used to be
    Posts
    4,849
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    what size is the BB shell?
    You might be able to press in some cartridge bearings and a regular BB spindle like this repair to a viscount bottom bracket...
    http://bikecult.com/works/parts/bbViscount.html
    {o,o**
    |)__)
    -"-"-

    O RLY?

Posting Permissions

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