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New bike and chain rattling

  • 16-02-2014 7:01pm
    #1
    billyhead
    Registered Users, Registered Users 2 Posts: 10,265 ✭✭✭✭


    Folks,

    Got a new road bike (Trek Madone) and took it for a spin yesterday. When I change to the big ring at the front on the bike and little ring at the back i hear a ratlling noise as if it is rubbing of the front derailer. Is this a common occurance with a new bike straight from the factory floor. I dont recall this happening with my previous road bike when I just purchased it.


Comments

  • #2
    Unknown Soldier
    Registered Users, Registered Users 2 Posts: 2,124 ✭✭✭Unknown Soldier


    billyhead wrote: »
    Folks,

    Got a new road bike (Trek Madone) and took it for a spin yesterday. When I change to the big ring at the front on the bike and little ring at the back i hear a ratlling noise as if it is rubbing of the front derailer. Is this a common occurance with a new bike straight from the factory floor. I dont recall this happening with my previous road bike when I just purchased it.

    Sounds like you need to let out the "high" limit on the front derailleur by a small fraction. A half turn to start off with.

    Youtube front derailleur adjustment. See below. Start @ 3.15



  • #3
    Cee-Jay-Cee
    Registered Users, Registered Users 2 Posts: 12,235 ✭✭✭✭Cee-Jay-Cee


    Turn the barrel adjuster at the rear derailleur half a turn, it should sort it out.


  • #4
    diomed
    Closed Accounts Posts: 4,744 ✭✭✭diomed


    Cables will stretch a bit in the first few hundred kilometers. The chain may skip from cassette to cassette at the rear so some adjusting might be required.

    A quick fix to this is using the shifters move the chain onto the big ring at the front and the middle cassette at the back (e.g if 10 rings then onto 5 or 6). Then turn the black adjuster knob on the small curved cable that comes out of the back of the rear cassette a little one way. Does the rattle get more or less? If more rattle return the knob to where it was then a little the other way. Keep adjusting a little until you have silence, and smooth shifting. Move to other gears and test again, and adjust if needed.


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