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Worn chainrings?

  • This topic has 13 replies, 12 voices, and was last updated 9 years, 1 month ago by Jack Osbourne snr.
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  • April 16, 2017 at 6:07 pm #27009
    MrMajic

    Hello all, can I have your thought on whether or not these chainrings need replacing? 3600 miles on my winter bike, on the same chain and cassette. I know I’ve not replaced the chain (and cassette) soon enough, I’ll keep a better eye on the next one, but do I need to replace the chainrings too?

     

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  • April 20, 2017 at 7:51 pm #891317
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    Jack Osbourne snr
    Fish_n_Chips wrote:
    Keep your running gear clean to avoid grinding paste syndrome yes

    Thats my sin on my commuter bike… It gets used all year in all weathers and doesn’t get cleaned anywhere near enough.

    I’m doing well to get 7000 miles out of a big chainring.

     

     

    April 18, 2017 at 8:48 pm #891315
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    Fish_n_Chips

    Keep your running gear clean

    Keep your running gear clean to avoid grinding paste syndrome yes

    April 18, 2017 at 10:42 am #891313
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    TypeVertigo

    rnick wrote:

    rnick wrote:
    Oh, the crazy way of shimano pricing means a few quid more gets you a whole chainset, if you can find one instock.

    Agreed, which is why replacing chainrings might make less sense compared to replacing the entire crank.

    OP – Your chainrings are fresh. Put more miles into ’em. I’d worry more about wear on the chain and cassette – compared to those, chainring wear is much, much slower.

    April 17, 2017 at 10:50 am #891311
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    rnick

    Sticking a new chain on may
    Sticking a new chain on may help in bringing out any wear issues. I’ve just changed the 105 drivetrain on my bike, 2 winters 10k miles and chain number 3 – the new chain slipped dramatically, I headed towards the hedge. Change cassette, same happens again. Changed the chainset and all is OK now. There’s not much in the way of teeth on a shimano chainset, so it’s hard to tell when worn out. Oh, the crazy way of shimano pricing means a few quid more gets you a whole chainset, if you can find one instock.

    April 17, 2017 at 7:18 am #891309
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    MrMajic
    beezus fufoon wrote:
    madcarew wrote:
    +1 to behindthebikesheds. They Look almost new. When you get significant burring and sharktooth appearance then look at replacing. I do plenty of racing and myc chainrings last  in the region of 12000 – 15000 miles. This is probably controversial here, but I can’ t see any reason why worn chainrings would hasten the wear rate on any of the rest of the drivetrain (chain included) so unless shifting performance is affected, carry on 🙂

     

    I agree – if you don’t race you might even double that

    the problem is when you get the chain sucked into the gap between the chainrings and the chainstay and then have to yank it back out – especially if the chainstay is made of a softer material than the chain, it’s not pretty

     

    Thanks again, that’s my aluminium winter trainer so it doesn’t get anywhere near the start line! Glad to hear it’s not going to cost me a chainring. I’ve found an app that reminds me by email at a given mileage to check my chain, so I ll keep on top of this one. Strava really should tweak the component tracking to include it. 

    April 17, 2017 at 1:40 am #891307
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    beezus fufoon
    madcarew wrote:
    +1 to behindthebikesheds. They Look almost new. When you get significant burring and sharktooth appearance then look at replacing. I do plenty of racing and myc chainrings last  in the region of 12000 – 15000 miles. This is probably controversial here, but I can’ t see any reason why worn chainrings would hasten the wear rate on any of the rest of the drivetrain (chain included) so unless shifting performance is affected, carry on 🙂

     

    I agree – if you don’t race you might even double that

    the problem is when you get the chain sucked into the gap between the chainrings and the chainstay and then have to yank it back out – especially if the chainstay is made of a softer material than the chain, it’s not pretty

    April 17, 2017 at 1:29 am #891305
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    madcarew

    +1 to behindthebikesheds.

    +1 to behindthebikesheds. They Look almost new. When you get significant burring and sharktooth appearance then look at replacing. I do plenty of racing and myc chainrings last  in the region of 12000 – 15000 miles. This is probably controversial here, but I can’ t see any reason why worn chainrings would hasten the wear rate on any of the rest of the drivetrain (chain included) so unless shifting performance is affected, carry on 🙂

     

    April 16, 2017 at 9:14 pm #891303
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    Anonymous

    Barely touched, you’ve got

    Barely touched, you’ve got thousands of miles left in those.

    April 16, 2017 at 9:12 pm #891301
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    ktache

    You buy a new chain, you go

    You buy a new chain, you go out and whenever you put down power it does the clunky thing.  You need a new cassette.

    You fit that, you go out and whenever you put down power you get the clunky thing.  You need at least one new chainring.  Try another. Clunky?

    You buy new chainrings.  And a chain checker.

    Then it happens again and you tell yourself that you must use the chain checker much more.

    And change the chain more too.

    April 16, 2017 at 7:57 pm #891299
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    StraelGuy

    Agree, they look fine.

    Agree, they look fine.

    April 16, 2017 at 7:46 pm #891297
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    MrMajic

     Thanks folks, that’s my

     Thanks folks, that’s my winter bike and I fully acknowledge I should’ve cleaned the drivetrain and changed the chain long ago. I will keep better maintenance on that bike next winter. 

    I’ll  give this crankset ago on the new chain and cassette that is fitted. 

    April 16, 2017 at 7:42 pm #891295
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    Nick T

    Looks fine, chainrings last a

    Looks fine, chainrings last a good while. 

    April 16, 2017 at 6:50 pm #891293
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    Johnnyvee

    Google how to tell if chain

    Google how to tell if chain rings are worn and you will see that yours are nowhere near. Are you having any symptoms or issues? Did you change your chain already? Did you clean your drive chain components often?

    It seems you wear out three chains to one cassette and three cassettes to one chain ring as a rule of thumb and if you change your chain before it gets too worn. So nine chains to one chain ring… 

     

     

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