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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 16, 2016 at 1:21 pm #805125
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    Johnny Crash

    Further to previous comments,

    Further to previous comments, this also happened to my frame (a 2010 CR-1 Pro) and Scott decided that as it was corrosion, it wasn’t covered by the warranty. 

    The bottle cage mounts in the seat tube had also corroded through. 

    I used rivnuts to mount the bottle cage onto and I simply glued and riveted the hanger back on with a hand riveter. (A clamp-on mech hanger didn’t work because of the location of the bottle cage and mounting holes.) 

    It has been perfectly fine and I’ve used the bike regularly for the last 36 months like this. 

     

    June 5, 2015 at 4:48 pm #805123
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    vaughan

    Thanks to the ealier bloggers
    Thanks to the ealier bloggers as I had a broken rivet on my Ribble Carbon R872 frame which is two years old. The blog gave me the confidence to make my own repair. I couldn’t face the hassle of getting the repair done under guarantee, so ordered a pop rivet gun from toolstation which arrived in two days (including a bank holiday) and only cost £10. It came with several rivets including some 1/8″ which fitted my frame. I wanted to use the bike before I could make a repair so made a tool which allowed made to fit an M3 screw into the hole with a nut on the inside. The tool consisted of a long aluminium tube with a hole to hole the nut. I even included a washer on the inside by glueing it to the nut. I could see the nut through the rivet hole and got the screw started OK. I then realised that it would be much more difficult to get the screw out and if the nut rotatated I would be really stuck — so not so clever after all #o ! So I waited for the gun to arrive.
    My son works in the aerospace industry and pointed out that electrolytic corrosion between carbon and aluminium is a big concern in aircraft. Hence there is always a thin glass layer and a waterproof layer between the carbon and the aluminium. I put some paint on the rivet to try and prevent the corrosion but I doubt whetehr this will last long: but now I know how to do the repair I can easily do it again.

    May 29, 2015 at 9:19 am #805121
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    Batchy

    Toro Toro wrote:A big reason

    Toro Toro wrote:
    A big reason is that modern carbon frames often have very non-standard profiles, especially around the BB, so a standard-shaped band-on would be no use. Nor can it be slid up and down the tube – to e.g. accommodate the fitting of a compact chainset – if the tube-profile changes signficantly over the sliding distance, as many would.

    Yes, but designers could possibly make a specific band to fit their tubes? It seems to me that ,for example, Scott have not done much r&d in this area by assuming that a poxy corrosion prone rivet will suffice on a very expensive piece of carbon fiber !

    May 28, 2015 at 10:19 pm #805119
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    Toro Toro

    A big reason is that modern
    A big reason is that modern carbon frames often have very non-standard profiles, especially around the BB, so a standard-shaped band-on would be no use. Nor can it be slid up and down the tube – to e.g. accommodate the fitting of a compact chainset – if the tube-profile changes signficantly over the sliding distance, as many would.

    May 28, 2015 at 12:00 pm #805117
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    JonD

    Batchy wrote:Mmmm ! Why do

    Batchy wrote:
    Mmmm ! Why do manufacturers use ” braze ons ” ? Surely band on mechs are simply less likely to cause problems and are cheaper to install and easier to adjust !

    I guess in no particular order: minor weight saving; that’s how they were often done on frames ; possible user error on refitting a band-on mech with overtightening the seatclamp ?

    Tho’ whether a braze-on subject to corrosion is a good solution is another matter – particularly if water ingress is likely to give issues.

    (IIRC the braze-on style mount I had on a Cannondale in the early 90’s was bolted on via a couple of vertically-aligned rivnuts)

    Still, good to hear it’s been sorted.

    May 28, 2015 at 11:38 am #805115
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    Batchy

    Mmmm ! Why do manufacturers
    Mmmm ! Why do manufacturers use ” braze ons ” ? Surely band on mechs are simply less likely to cause problems and are cheaper to install and easier to adjust !

    May 26, 2015 at 4:10 pm #805113
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    Johnwm66

    Just wanted to thank you for
    Just wanted to thank you for such sensible advice. It saved me from not having my bike on our three month adventure in Italy. Loose rivet broke off my Pinarello Dogma 2 and the front derailleur was left extremely loose. The rivet head then broke off in my fingers. After reading all the precious postings about carbon frames, I thought that was it for cycling here, but after reading your post, I pushed the rest of the broken rivet through and the first Italian Hardware store that I tried had a pop rivet gun. Bingo two new rivets (I found a second missing one) and good as new and handling all that Strade Bianche can dish out.

    BTW I am probably the only guy who let the bike shop drill holes in my carbon frame to fit new Campy electronic group set. It was the Dogma 2 which is not meant to allow the Electronics unless you have the special frame. That was two years and many hard kms ago without any trouble. Frame warranties not worth the trouble and carbon is much stronger than the worry worts think.

    December 27, 2014 at 8:50 pm #805111
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    Vercors

    Far from you Leigh2612, so
    Far from you Leigh2612, so unlikely to be the same shop. Pleased you got it sorted.

    December 27, 2014 at 4:46 am #805109
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    Leigh2612

    OP what area are you in?
    OP what area are you in? Sounds Luke the same thing that happened to me recently. Got fobbed off by LBS then another shop got it warrantied fairly quickly…..just wondered if the initial shop may be the same?

    September 14, 2014 at 11:15 am #805107
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    jacknorell

    Well done Evans.
    The original
    Well done Evans.

    The original LBS stating it was caused by riding a bike, in the wet, is ludicrous. Removing the seatpost would not affect the rivet in any way.

    September 14, 2014 at 10:43 am #805105
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    trek-buyer

    Kudos to Evans, but this
    Kudos to Evans, but this should have been done by LBS, it was their responsibility, shame on them. These will be the same guys pleading in future to support the local and not shop with the larger chains.

    Glad you got it sorted.

    September 13, 2014 at 8:23 am #805103
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    Vercors

    PostScript. A happy ending.
    PostScript. A happy ending. Scott did repair it under warranty. Credit to them and especially Evans who dealt with the warranty claim on my behalf, even though I did not buy the bike from them, stripping it down, sending the frame away and rebuilding it with a free full service, new cables and offering a tune up when they stretch, all at no cost.

    July 25, 2014 at 6:57 pm #805101
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    Vercors

    The good news is that LBS (on
    The good news is that LBS (on inspection) and a fairly local frame builder (subject to inspection) reckon the damage may be fixed by riveting and the frame can be saved, although LBS is not confident about the task and therefore would not undertake it.

    The bad news is that that LBS’ position is that the failure was caused by heavy corrosion caused by water Ingress from riding in the wet and therefore fuller servicing they say is relevant because on a service it would have been removed by more regularly removing the seat tube to make sure there is no water ingress. LBS reckons no way will it be covered under warranty or by them, although they are still friendly. Unless I get a different view, that appears to scupper the warranty and statutory rights.

    I have touring bikes 20 plus years old where this has never been an issue and have cleaned, dried and lubed this bike after rides but maybe carbon, no mudguards is another ball game? I will confirm with frame builder if frame can be fixed and how much the repair will cost before deciding. Thanks again for all previous posts.

    July 24, 2014 at 5:39 pm #805099
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    Vercors

    In response to my complaint
    In response to my complaint LBS has made warmer noises and agreed to look at it to try to help (but without an actual commitment). I’m taking it in, so we’ll see.

    July 23, 2014 at 11:32 am #805097
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    pwake

    Yep. Definitely exhaust all
    Yep. Definitely exhaust all your other options first before you repair it yourself, as it really does look like a manufacturing defect.

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