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  1. #1
    Join Date
    Jul 2005
    Posts
    996

    Dropping chain off chainring

    Anyone have any thoughts on how to prevent continually dropping the chain off of the front chain ring? My kids bike (24" DB) came with a chain guard but all that did was make it extremely hard to to the chain back on the chain ring once it fell off and didn't prevent it from coming off in the first place so I removed it. It happens about 4 times/ride on any real trail ride and frequently when he just goes up a curb riding to school.

    I took out 2 link from the chain thinking it would add more tension but it hasn't made a noticeable difference. Should I take another 2 links out and see if that improves or are there any other suggestions (besides buying a real chain guard which I may end up doing if that's what the only answer but thinking there has to be an alternative).

    Thoughts?

  2. #2
    Join Date
    Apr 2012
    Location
    Stumptown
    Posts
    5,757
    Make sure the chain guard is properly positioned. Could be that it just isnít where it needs to be.

    Other than that youíll have to either replace it with something better or go to a narrow wide chainring I believe.

  3. #3
    Join Date
    Jan 2009
    Location
    Hyde Park, Vt
    Posts
    125
    Narrowwide + clutched derail if its 10 speed.....

    If its not 10 speed ....

    you can try to sandwich to chainring between two cheap bashguard much larger than the chainring. IE use a bash for 36 on 32 tooth chainring, but I do not know what size chainring size you have...

  4. #4
    Join Date
    Oct 2004
    Location
    Seattle
    Posts
    1,047
    http://n-gear.com/whatis.html

    I used these on a few bikes switching to a single front ring and bash guard.


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  5. #5
    Join Date
    Feb 2008
    Location
    Donner Summit
    Posts
    699
    Narrow-wide works well even without a clutched derailleur, particularly for short range derailleurs and a properly sized chain.

    Use this method to check chain length without removing the chain.

  6. #6
    Join Date
    Jul 2005
    Posts
    996
    Only 8 speed so clutch derailleur is out but will look into jump stop as the pricing is right then maybe move on to a narrow-wide if it doesn't work (after rechecking chain length).

    Thanks to all for the input.

  7. #7
    Join Date
    Aug 2007
    Location
    Bottom feeding
    Posts
    7,123
    My wife runs a narrow wide on her old school 9 speed XT, never drops the chain.
    Well maybe I'm the faggot America
    I'm not a part of a redneck agenda

  8. #8
    Join Date
    Mar 2008
    Location
    northern BC
    Posts
    17,978
    Narrow wide only works with a single narrow wide chain ring, if you got 2 front chain rings it will only shift into exactly 50% of the teeth.

    You might rig s front chain guide out of an old front der
    Lee Lau - xxx-er is the laziest Asian canuck I know

  9. #9
    Join Date
    Jul 2005
    Posts
    996
    Bike only has 1 chain ring so no issue there but may consider the front der rig if jump stop doesn't solve the issue.

  10. #10
    Join Date
    Mar 2008
    Location
    northern BC
    Posts
    17,978
    You gotta have a narrow wide chain ring otherwise it's not narrow wide it's just one chain ring

    If you look at a real narrow wide chain ring every other tooth is either narrow or wide so the chain only fits in every other tooth right ?

    If you could put a front der on the seat post ( used would be fine) and rig the cable so the der stays in one spot it could guide the chain

    Also look at an envy inner plate, it goes on the inside of the chainring and keeps the chain from falling inwards
    Lee Lau - xxx-er is the laziest Asian canuck I know

  11. #11
    Join Date
    Dec 2016
    Location
    In a van... down by the river
    Posts
    3,822
    Quote Originally Posted by rudy View Post
    Bike only has 1 chain ring so no issue there but may consider the front der rig if jump stop doesn't solve the issue.
    If it's like most cheap-ass 24" kids' bikes, I suspect it'll be difficult to find a narrow-wide ring that is compatible with the shitty crankset that usually comes on kid-bikes.

  12. #12
    Join Date
    Mar 2008
    Location
    northern BC
    Posts
    17,978
    You ^^ are probably right
    Lee Lau - xxx-er is the laziest Asian canuck I know

  13. #13
    Join Date
    Oct 2008
    Location
    Vernon BC
    Posts
    1,675
    Fun I fact; you can run a 10spd chain and mech with an 8spd casstte/ shifter.
    "Its not the arrow, its the Indian" - M.Pinto

  14. #14
    Join Date
    Jun 2008
    Location
    SLCizzy
    Posts
    2,654
    Have you checked that the chainring is straight and there arenít any bent/broken teeth? Also check the bb is tight. Inspect the chain to check for twisted links.
    Do all this ^^^ before going down the crazy drivetrain rabbit hole that just erupted.
    Most kids bikes have weird components that are best repaired with a tap from a mallet, tweak from a crescent wrench or replacement.


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  15. #15
    Join Date
    Nov 2005
    Posts
    2,833
    Quote Originally Posted by joetron View Post
    Have you checked that the chainring is straight and there arenít any bent/broken teeth? Also check the bb is tight. Inspect the chain to check for twisted links.
    Do all this ^^^ before going down the crazy drivetrain rabbit hole that just erupted.
    Most kids bikes have weird components that are best repaired with a tap from a mallet, tweak from a crescent wrench or replacement.
    IDK how we're ever gonna be the next Empty Beer if you keep bringing rational thinking into it every time. SMH

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