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Help needed changing a chain

  • 30-05-2011 2:37pm
    #1
    longn
    Closed Accounts Posts: 11 ✭


    I'm a complete beginner at this and decided to try my hand at it. I have a standard road bike and when taking off the previous chain I counted all the links so when I put on the new chain, it would be the same length. I didn't have one of those master links so joined them using the chainbreaker as normal. However, I found when I took it for a test spin, when I go into one particular gear on the big and small ring, the gear keeps jumping.

    Does anyone know what would cause this and how to fix it? I have a feeling I might need to add another link to the chain but i'm not sure. As I said, i'm a beginner to this so any dumbed down language would be appreciated!!

    Thanks in advance for your help.


Comments

  • #2
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    At a guess you have a tight link. When you closed the link with the chain tool, you squeezed the chainplates together thus trapping the inner plates. This link doesn't bend like the rest so it skips on the smaller cogs. The fix is:
    1. Find the tight link. (rotate the pedals watching a small cog for the link that doesn't bend).
    2. Place the tight link in the chain tool over the protrusions nearest the push pin and screw.
    3. Tighten the screw until the push pin is making firm contact with the rivet.
    4. Tighten 1/8 turn more.
    5. Check to see is the link free to move now.

    What this does is it pushes the rivet a bit further through the nearest chain plate but not through the furthest one. Therefore the plates are separated a bit and the link runs free.


  • #3
    Mr. Skeffington
    Registered Users, Registered Users 2 Posts: 922 ✭✭✭Mr. Skeffington


    It sounds like you may need to replace your cassette if its only skipping in one gear. Usually if the cassette is badly worn when you replace the chain it will slip in the most commonly used gear.

    BTW a quick way to check for a tight link is if you rotate the pedals backwards slowly you will see a tight link very easily by examining the chain running over the rear sprockets. The chain will hop up slightly where there is a tight link.


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