New Chain

ej2320
ej2320 Posts: 1,543
edited September 2014 in MTB workshop & tech
Fitted a new chain and there's a grinding sound from the front granny ring, it doesn't do it in the big ring
Is it just a case of the new chain bedding in? The chainring still has life in it

Comments

  • jimothy78
    jimothy78 Posts: 1,407
    Are you sure it's not the chain rubbing on the derailleur cage?
  • Terrytibbs
    Terrytibbs Posts: 76
    jimothy78 wrote:
    Are you sure it's not the chain rubbing on the derailleur cage?

    Probably this.

    I am just imagining the chain hasn't been shortened to fit and is basically just too long meaning it rubs on the bottom of the front mech when in small - small rings.
  • ej2320
    ej2320 Posts: 1,543
    It's not the cage rubbing

    It's fine when I spin it in a bike stand, it's only when I put a decent bit of pressure on the pedals
  • Terrytibbs
    Terrytibbs Posts: 76
    Check the chain rings are clean and not covered in old oil and especially sand.

    It may just be worn though so the new chain isn't in a way, pairing up to the old chain ring.
  • jimothy78
    jimothy78 Posts: 1,407
    To check the chainring for wear, wrap the new chain around it, then hold the centre of the wrapped part and see how far you can pull it away from the teeth. If the chain is snug against the ring, it's fine, but if it comes away from the chainring by a significant amount, it means it's worn.

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