Advertise on Bikeforums.net



User Tag List

Results 1 to 23 of 23
  1. #1
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    crak near dropout

    What would you suggest?
    Last edited by lineinthewater; 05-09-13 at 07:03 PM.

  2. #2
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    921
    Mentioned
    31 Post(s)
    Tagged
    0 Thread(s)
    Well paint removal and polishing will let you see the yes/no on the crack.

  3. #3
    Senior Member gyozadude's Avatar
    Join Date
    Jun 2011
    Location
    Sunnyvale, California
    My Bikes
    Bridgestone RB-1, 600, T700, MB-6 w/ Dirt Drops, MB-Zip, Bianchi Limited, Nashbar Hounder
    Posts
    1,182
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is the frame under warranty? If so, is there a dealer close by, an LBS maybe? I'd bring it there first.

    If it's out of warranty, I'd get a buddy to sit on the big and sort of bounce up/down on the pedals while I watched the crack area. If I can visibly see the crack widening, then sure, I think that's confirmation you have a crack. If I don't see a crack, I'd still be suspicious so I'd like scrape paint to check underneath.
    Yes, I can roll my own potsticker skins!

  4. #4
    Senior Member
    Join Date
    Mar 2013
    Location
    NW UK
    My Bikes
    1992 Marin Eldridge Grade, 2007 Kona PHD and 199? Trek 1000 (current build project)
    Posts
    418
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I also would sand the area to check for sure (but not if the bike's under warranty of course ).

  5. #5
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks.
    Last edited by lineinthewater; 05-09-13 at 07:02 PM.

  6. #6
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    nvmd.
    Last edited by lineinthewater; 05-09-13 at 07:03 PM.

  7. #7
    S'Cruzer pierce's Avatar
    Join Date
    Jun 2010
    Location
    122W 37N
    My Bikes
    too many
    Posts
    2,287
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    thats an odd looking dropout... the axle notch doesn't look nearly deep enough, and where's the derailleur go?? or is that with the hanger removed?

  8. #8
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by pierce View Post
    thats an odd looking dropout... the axle notch doesn't look nearly deep enough, and where's the derailleur go?? or is that with the hanger removed?
    Hanger removed.
    Last edited by lineinthewater; 05-09-13 at 07:04 PM.

  9. #9
    coprolite fietsbob's Avatar
    Join Date
    Jun 2010
    Location
    NW,Oregon Coast
    My Bikes
    7
    Posts
    921
    Mentioned
    31 Post(s)
    Tagged
    0 Thread(s)
    Could be tool marks, left from Making the part, too ..

  10. #10
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by fietsbob View Post
    Could be tool marks, left from Making the part, too ..
    Perhaps.
    Last edited by lineinthewater; 05-09-13 at 07:04 PM.

  11. #11
    Senior Member CACycling's Avatar
    Join Date
    Feb 2008
    Location
    Oxnard, CA
    My Bikes
    '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
    Posts
    4,442
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by fietsbob View Post
    Could be tool marks, left from Making the part, too ..
    Would think you'd see similar on the other DO if that is the case.

  12. #12
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yep, not there.
    Last edited by lineinthewater; 05-09-13 at 07:04 PM.

  13. #13
    Old fart JohnDThompson's Avatar
    Join Date
    Nov 2004
    Location
    Appleton WI
    My Bikes
    Several, mostly not name brands.
    Posts
    12,700
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by gyozadude View Post
    Is the frame under warranty? If so, is there a dealer close by, an LBS maybe? I'd bring it there first.
    ^^^^^^^^^^^^^^^^^^^^^^^
    This.

    If the frame isn't under warranty, you'll need to remove the paint from the area to determine if this is really a crack (it is in a common spot for breakage to happen).

  14. #14
    Senior Member
    Join Date
    Sep 2007
    Posts
    8,525
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    It doesn't look like a crack (to me). It looks like a ridge (like what could have occurred in casting the dropout).

  15. #15
    Senior Member
    Join Date
    Apr 2009
    Location
    New Rochelle, NY
    My Bikes
    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
    Posts
    21,203
    Mentioned
    49 Post(s)
    Tagged
    1 Thread(s)
    IMO this is a poor design for an aluminum frame end. The edge of the milled pocket where the hanger attaches is a stress riser and a likely place for failure. But it appears that the crack lines up differently than I would have predicted.

    Warranty or no, I'd carefully sand off a bit of paint at one end of the crack and confirm it's int that it's into the metal, though the way it seems to wrap around the area, I'm close to 100% sure it is.

    I wouldn't sand the entire length yet lest it give someone an excuse to deny a legitimate warranty claim. If there is a crack, I'd say you have a solid warranty claim based on the limited view of the frames condition.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  16. #16
    Senior Member Chombi's Avatar
    Join Date
    Jul 2009
    Posts
    9,373
    Mentioned
    12 Post(s)
    Tagged
    0 Thread(s)
    I disagree about sanding off any of the paint to check for cracks yourself if you are taking it to the dealers for a warranty claim. Lots of people and companies believe in the "you touch it, you own it rule"....which they sometime also translate to "you touched it, you must have been doing something to it to have caused it somehow".... Let the dealer do the final analysis, preferably, in front of you, so you can observe and maybe take pictures or a short video with your phone if they would let you, so you have a record of the DO inspection/analysis being done, just in case the bike company starts to get wishy-washy about the warranty claim.
    JMOs

    Chombi

  17. #17
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Found a thread with similar mark.
    Last edited by lineinthewater; 05-09-13 at 07:05 PM.

  18. #18
    Senior Member
    Join Date
    Mar 2013
    Location
    NW UK
    My Bikes
    1992 Marin Eldridge Grade, 2007 Kona PHD and 199? Trek 1000 (current build project)
    Posts
    418
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What frame is yours, as a matter of interest?

  19. #19
    Senior Member
    Join Date
    Sep 2009
    Posts
    868
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks.
    Last edited by lineinthewater; 05-09-13 at 07:07 PM.

  20. #20
    Senior Member due ruote's Avatar
    Join Date
    Dec 2006
    Posts
    4,323
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Chombi View Post
    I disagree about sanding off any of the paint to check for cracks yourself if you are taking it to the dealers for a warranty claim. Lots of people and companies believe in the "you touch it, you own it rule"....which they sometime also translate to "you touched it, you must have been doing something to it to have caused it somehow".... Let the dealer do the final analysis, preferably, in front of you, so you can observe and maybe take pictures or a short video with your phone if they would let you, so you have a record of the DO inspection/analysis being done, just in case the bike company starts to get wishy-washy about the warranty claim.
    JMOs

    Chombi
    +1 I wouldn't touch it either, tempted though I might be.

    How old is the frame, and what kind of mileage is on it? Looks pretty new by my standards (I mostly ride a 40 yo steel frame).

    In the absence of a catastrophic event, that seems like the kind of damage that just shouldn't occur unless there's a design flaw. Given that, I'd push for repair/replacement whether or not it's under warranty. At the very least they should give you a screaming deal on a new frame.

  21. #21
    Senior Member
    Join Date
    Mar 2013
    Location
    NW UK
    My Bikes
    1992 Marin Eldridge Grade, 2007 Kona PHD and 199? Trek 1000 (current build project)
    Posts
    418
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by due ruote View Post
    In the absence of a catastrophic event, that seems like the kind of damage that just shouldn't occur unless there's a design flaw.
    It's happened before, on exactly the same design of dropout, on other very similar Cannondale frames. See the very similar thread the OP found.

  22. #22
    Senior Member seymour1910's Avatar
    Join Date
    Jul 2012
    Location
    Hampton, VA
    My Bikes
    CAAD7
    Posts
    2,043
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    I have the same bike different color, I will check my frame when I get home, I will take pics if you want me too.

  23. #23
    Senior Member seymour1910's Avatar
    Join Date
    Jul 2012
    Location
    Hampton, VA
    My Bikes
    CAAD7
    Posts
    2,043
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    inspected my CAAD7 very closely, no such marks on either side. Mine is the 2005, same year as yours OP.

Posting Permissions

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