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  1. #1
    mtb junkie
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    Mar 2011
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    New question here. chain rub,please advice.

    hello everybody and excuse me if i post this in the wrong section. i have a trek fuel ex 9.so far so good. one day when i was out riding a hill (up) my chain fall from the lower chainring on the frame BB. rigt where the weld starts. it has "eaten" some of the welding approx 1mm DEPTH . (i was only spining the crank 2 full turn..) so: do you thing this will be a problem? a future crack could apear? should i smooth the affected area with some sandpaper?

    the chain made damage right where it touches the frame in this picture: http://mtb198.oneninety8llc.netdna-c...racket-red.jpg
    Last edited by null; 05-05-2011 at 02:16 AM.

  2. #2
    mtbr member
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    Is the frame aluminum or carbon? If it is aluminum it probably is not a big deal. If you are really concerned go take it to a Trek dealer and have them inspect it. If you posted pics it would also help to determine how bad it is.
    2015 Niner Jet 9 Carbon
    2014 Focus Raven 27R
    2017 Lynskey GR250
    2016 Niner BSB
    1987 Haro RS1

  3. #3
    No good in rock gardens..
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    I doubt that one incident like that will kill your frame. What I do, is wrap a few layers of tape over that area, or stretch a section of inner tube over there, so that if the chain falls like that it won't eat into the paint or metalwork.
    Less isn't MOAR

  4. #4
    mtb junkie
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    i will post a picture soon.yes i already wrap it with inner tubes and zip ties. it's aluminium. thanks guys.

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