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Scott CR1 – does broken front mech mean replacing the whole frame?!

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  • July 22, 2014 at 9:18 pm #21963
    Vercors

    The front derailleur mech of my Scott CR1 has detached itself from the frame as shown on the attached photograph.

    My questions are:

    Does the (carbon) frame need to be replaced as an intial telephone call to the LBS I bought it from and visit to Evans has suggested?

    Even though it is the derailleur, for the above reason it may be a frame issue. Does anyone have any useful experience of Scott’s warranty? Intial indications from LBS and Evans are that Scott are very strict and unless you can show documented evidence that you have serviced the bike every year, they will not honour the warranty?

    How much should I expect to pay to replace the frame (whole bike is £1800), new derailleur and refit components to new bike (assume alll done by LBS or say Evans)? I am trying to work out the economics of it.

    Background

    I bought the bike, a scott cr1 team 105 triple, in July 2010 from LBS. For various reasons it has had modest use, hundreds of miles a year rather than thousands. I’ve been pleased with it (until now). I was riding along nicely yesterday when I noticed it had dropped into the small front ring. After a failed attempt to change up I stopped to inspect the problem. The plastic ring which forms part of the derailleur seems to have snapped and slipped further down the seat tube and the rest of the mech has detached a bit from the frame. There are no visible holes in the frame at the point of detachment. LBS’s response has been disappointing so far, questioning whether I may have crashed it (I haven’t ) or done heavy mileage and as they are no longer a Scott dealer, they have largely washed their hands of it. They have sent me off to a Scott dealer, the most convenient for me being Evans where it is booked in for them to take a look. The bike has been well maintained, just not formally serviced every year. I am aware of my statutory rights, so I may be back to the LBS if things don’t work out.

    Sorry this is wordy, Thanks in advance for any useful comments.

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  • July 23, 2014 at 9:46 am #805095
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    notfastenough

    Any repairs you attempt to
    Any repairs you attempt to make will surely void any warranty claim, so I’d leave that until you are 100% certain that Scott or your LBS isn’t going to help out.

    It p*sses me off when shops pull out an excuse for it not being their problem. Them not being Scott dealers anymore isn’t your problem, but your problem is definitely theirs.

    Take as many pictures as you can before you send it anywhere.

    July 23, 2014 at 8:57 am #805093
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    Vercors

    Thanks for all the posts so
    Thanks for all the posts so far. I have sent a written complaint to the LBS to get it on record. I have found them to be fair until now, so I’ll see if they will reconsider.

    July 23, 2014 at 8:47 am #805091
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    glynr36

    Scott have a 5 year frame
    Scott have a 5 year frame warranty.
    Get onto the shop you got it from, and tell them you want to pursue a warranty claim for it and see what Scott offer you.

    July 23, 2014 at 8:28 am #805089
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    Gkam84

    So they are still riveting
    So they are still riveting carbon frames? I thought that was a long since gone method.

    I still wouldn’t do a DIY job on it as first choice. I would see what Scott will do for you regards warranty replacements.

    If that is a no go, then try the DIY or get someone to rivet it back on for you.

    July 23, 2014 at 8:27 am #805087
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    Jimmy Ray Will

    As above… or if all else
    As above… or if all else fails, remove the rest of the hanger, buy a clamp on front mech and just clamp it around the frame.

    July 23, 2014 at 3:16 am #805085
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    pwake

    So, in answer to your
    So, in answer to your original question; no.

    July 23, 2014 at 3:11 am #805083
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    pwake

    Your frame isn’t ‘done’ mate.
    Your frame isn’t ‘done’ mate. From the looks of your photo all you have is a broken rivet, so should be a simple repair. I’ve got a CR1 and the front mech mount is attached to the frame by four standard ‘pop’ rivets. Your photo looks to show that one of these has broken (maybe due to galvanic corrosion between the carbon and aluminum) with half the rivet still stuck in the frame and the other half in the front mech mount (under a layer of paint). To repair the damage you should just be able to push the half in the frame into the frame; remove the bottom bracket to get the half rivet out, otherwise it will rattle around in their and drive you nuts! Then remove the half in the front mech mount. You should then have a hole in the mech mount and a matching hole in the seat tube. Now you get yourself down to Screwfix and buy a hand riveter and some rivets (they sell a mixed rivet pack, so you should get the right size; you can compare the head size to select the correct one), this shouldn’t cost you more than £30. Get back home, bend the front mech mount gently back into position, select your rivet (maybe spray it with some paint first to make it more resistant to galvanic corrosion), put it in the rivet gun, pop it through the matching holes, squeeze the rivet gun and Bob’s your uncle! Good as new! Don’t worry about the frame, this looks like a failure of the rivet and the frame should be fine. Carbon-fibre reinforced plastic isn’t some mysterious, magical material, as some would have you believe; it’s bloody strong stuff (not fantastic with impact loads, admittedly) so give it a go, or alternatively try and deal with Scott/LBS/Evans BS and end up shelling out for a new frame.
    I’ve actually carried out this repair to two bikes including a CFRP framed TT bike that subsequently carried me through one Ironman and several half-ironman races plus loads of TT’s and shorter tri’s.
    Bikes are simple! Hope this helps?

    July 22, 2014 at 9:59 pm #805081
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    Gkam84

    On a carbon frame, it almost
    On a carbon frame, it almost certainly means the frame is done, because it is not a typical “braze on” where it was brazed to a metal frame.

    Before brazing, they were riveted to the frame.

    I think on carbon, they are moulded into the frame during manufacture, hence it cannot just be typically repaired.

    If it can be taken off cleanly, you could get a carbon braze on adapter and be going again, but I don’t know if that would weaken the structure of the tube or not. You really need to get in contact with Scott directly, I wouldn’t be going through Evans as they had nothing to do with selling you the bike in the first place. They are just going to charge you to say it is or isn’t broken.

    I would be going back to the place you originally purchased it and demanding that they are responsible for your bike and any warranty issues, regards whether they deal in Scott or not.

    July 22, 2014 at 9:37 pm #805079
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    Flying Scot

    The derailleur is intact, it
    The derailleur is intact, it is a ‘Braze on’ type.

    What’s bust is the mounting that’s glued and riveted to the frame, the dealer is correct, it’s a part of the frame and technically, yes the official manufacturer advice is a new frame.

    However carbon fibre frame repair specialists will be able to repair it.

    In the old days,these mounts were brazed to the steel frames.

    I haven’t had carbon repaired, so don’t offer a recommendation for who to use, but there are a few out there.

    This kinda thing

    http://www.carbonframerepair.com/index.php/bh-g5/

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