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Chainset Maintenence

  • 19-08-2014 10:50am
    #1
    youtheman
    Registered Users, Registered Users 2 Posts: 1,292 ✭✭✭


    Folks, how often do you change your Chain-rings ?.

    I replace my chain when my Park Tool Wear Indicator (brilliant piece of kit) indicates between 0.5% and 0.75% stretch. I replace the cassette with every second chain (some people replace it with every chain).

    But to date I've never replaced my chain-rings. And I don't even know how to detect if they are excessively worn. Some people have indicated a 12,000 km max life on the chain-ring.

    Why do you do ?


Comments

  • #2
    07Lapierre
    Registered Users, Registered Users 2 Posts: 8,256 ✭✭✭07Lapierre


    Keep doing what your doing and the chain rings should last a lifetime
    ("If it ain't broken...don't fix it")


  • #3
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    I replaced my 5 year old 20-30,000km middle ring recently but only because I wanted a 39t instead of the original 42t.


  • #4
    NeedMoreGears
    Registered Users, Registered Users 2 Posts: 1,419 ✭✭✭NeedMoreGears


    The teeth on the chainring become sharper and narrower with wear -you get a shark tooth look to them. I usually find the big ring wears more but I replace both together - I'd get about 20-25k from them which is equivalent to three years/three chains/one cassette. I'm not sure exactly how to check the cassette other than looking for similar wear patterns but 25k feels about right.

    See http://cyclingtips.com.au/2009/03/how-to-check-for-chain-wear/


  • #5
    triggermortis
    Registered Users, Registered Users 2 Posts: 2,684 ✭✭✭triggermortis


    I changed chainrings on my MTB when they were worn out. The had a shark fin profile and I got a lot of chain suck - the chain stays stuck to the ring as it rotates instead of disengaging, causing the wheel to lock. That was after about 3 years use in all weathers and vesy sandy soil. ( I also got through 3 BB's in that time).
    Haven't changed a road bike chainring yet after approx 8000K on each bike I own


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