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
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Thread: chain rub,please advice.