Grating noise from chainset?

kirby700
kirby700 Posts: 458
edited June 2014 in MTB workshop & tech
How do you know when the teeth on my chainset are shot? Changed the chain for a KMC X10 and a new cassette SLX, since then when putting pressure on it make a really loud grating noise. Light pedal pressure is ok but any hard pressure and it does it but strangely only inner ring. It doesn't skip and shifts brilliantly.

I've checked the chainrings are tight, no stiff links

Its a FSA comet x10

Help as I had to ride all day on the big ring!
GIANT XTC 2.5
BOARDMAN TEAM FS - NOW GONE
NUKEPROOF MEGA TR 275 COMP
YT INDUSTRIES CAPRA

Comments

  • The Rookie
    The Rookie Posts: 27,812
    Usual cause of a grating noise is crap trapped in the chainset.....
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • benpinnick
    benpinnick Posts: 4,148
    As its an FSA chainset I would first check its not come loose. This is common in my experience and causes mysterious chainset grinding!
    A Flock of Birds
    + some other bikes.
  • kirby700
    kirby700 Posts: 458
    All tight and dirt free. I'm thinking its worn but seems too few miles.
    GIANT XTC 2.5
    BOARDMAN TEAM FS - NOW GONE
    NUKEPROOF MEGA TR 275 COMP
    YT INDUSTRIES CAPRA

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