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Thread: A new newb. question

  1. #1
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    Default A new newb. question

    What do you measure to find out if your chain rings need to be replaced?

    I've never had to replace one.
    elysian
    Tom Tolhurst

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    Default Re: A new newb. question

    Not sure about measuring though I suppose you could measure the teeth of a new ring versus the teeth of your current ring. The best way I tell is the old shark-fin look or grooves/work areas at the bottom of the teeth.

    Image poached from world wide web.

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    Default Re: A new newb. question

    Look at yours and then look at some new ones. Worn ones do look like shark fins rather than Mt. Fuji.

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    Default Re: A new newb. question

    w0rd.

    I've seen that shark fin on some chain rings. I just didn't know if there's a way to measure ... like the way you can with chains.

    Thanks
    elysian
    Tom Tolhurst

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    Default Re: A new newb. question

    The inside ring on my main road bike is starting to mushroom a bit.

    It would be trashed 10x over by the time it started to shark fin me thinks.

    Its more obvious on MTBs when replacement is needed. Little ring will suck with a new chain. Big rings get replaced when 10 percent of the teeth have been ground off (rocky where I live).

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    Default Re: A new newb. question

    small ring every few years.
    big rings? not very often

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    Default Re: A new newb. question

    One way to check rings and cogs is to rub the end of a small screwdriver over the side on which the chain engages. If they have a sharktooth, you can often feel the transition before you can see it.

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    Default Re: A new newb. question

    If you can lift your chain off the ring from the front and see daylight it's toasted.

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    Default Re: A new newb. question

    Quote Originally Posted by Too Tall View Post
    If you can lift your chain off the ring from the front and see daylight it's toasted.

    The chain, the ring, or both? I've always heard that's a good way to measure chain stretch, but never heard that would indicate the ring was worn also.

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    Default Re: A new newb. question

    if you question it change it along with chain and cogs


    big tips to save lots of money in the long run on cogs and chain rings

    change you chain at between 1200-1500mi keep the chain clean clean clean wipe it every day and clean every 5th day do this to save your cogs and chain rings so keep them as clean too this way you wavoid the 300-500+ bill just in parts and get a good 7+K out of a set of rings and cogs

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