Crack of doom?

Tom M
Tom M Posts: 37
edited February 2016 in Workshop
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Comments

  • damocles10
    damocles10 Posts: 340
    I would take it to your LBS to have it checked out.
  • redvision
    redvision Posts: 2,958
    damocles10 wrote:
    I would take it to your LBS to have it checked out.

    I agree. Difficult to tell from the pictures.
    Only way to be sure is to get it checked out.
  • frisbee
    frisbee Posts: 691
    How is a local bike shop qualified to diagnose frame failure? The last time I checked most don't non-destructive testing facilities (not that you'll necessarily tell even with NDT).

    3 options:

    ignore it
    get someone to inspect it and repair it properly
    buy a new frame

    Getting some spotty Herbert in the local bike shop, half your weight, with an interest in selling you a new bike to lean on it isn't going to tell you much!
  • Matthewfalle
    Matthewfalle Posts: 17,380
    As Dolan are in the UK would it be a crazy idea to it back to them to have a look rather than just take it to your LBS?
    Postby team47b » Sun Jun 28, 2015 11:53 am

    De Sisti wrote:
    This is one of the silliest threads I've come across. :lol:

    Recognition at last Matthew, well done!, a justified honour :D
    smithy21 wrote:

    He's right you know.
  • Ben6899
    Ben6899 Posts: 9,686
    Send Dolan photos - or pop and see them - their customer service is great.
    Ben

    Bikes: Donhou DSS4 Custom | Condor Italia RC | Gios Megalite | Dolan Preffisio | Giant Bowery '76
    Instagram: https://www.instagram.com/ben_h_ppcc/
    Flickr: https://www.flickr.com/photos/143173475@N05/
  • Tom M
    Tom M Posts: 37
    Spoken to Dolan this morning and sent some pics, so will see what they say. Did also contact a carbon repair place and they seemed to think that the lug was becoming unbonded
  • DeVlaeminck
    DeVlaeminck Posts: 8,744
    A carbon repair place is the way to go - Dolan probably better than lbs but not that much better. Bottom line is unless you can be 99% certain it is superficial you probably don't want to be riding it at any speed and only a specialist is going to have a chance of coming close to giving you an informed opinion.
    [Castle Donington Ladies FC - going up in '22]
  • seanorawe
    seanorawe Posts: 950
    Some places can take an xray of the frame, its expensive but you will get your answer.

    I saw this another persons post

    In my experience with carbon fibre from racing motorcycle components, if it is stressed suddenly beyond its elastic limits the resin (or paint) will show signs of cracking. It is very difficult to bend, twist or deform carbon beyond its limits without it showing external visible signs.
    Cube Attain SL Disc
    Giant CRS 2.0
  • Tom M
    Tom M Posts: 37
    Dolan said the way that frame is made the seat-tube section has a male extension, and the seat stay a female, and are bonded together, with filler put around the junction and smoothed off. They seemed to think the crack was in the filler, so wasn't necessarily as bad as it looked.

    Is a bad time to be needing a new frame right now, but would like a bit of confidence isn't going to part company on a 40mph descent.
  • damocles10
    damocles10 Posts: 340
    frisbee wrote:
    How is a local bike shop qualified to diagnose frame failure? The last time I checked most don't non-destructive testing facilities (not that you'll necessarily tell even with NDT).

    3 options:

    ignore it
    get someone to inspect it and repair it properly
    buy a new frame

    Getting some spotty Herbert in the local bike shop, half your weight, with an interest in selling you a new bike to lean on it isn't going to tell you much!

    There are some really knowledgeable mechanics out there...But, I see your point.
  • fenix
    fenix Posts: 5,437
    Rob Hayles does CF repair - if it needs it - he'd be my best bet. Ask him ?

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