Thick thin chainrings

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  • Thick thin chainrings
  • Ramsey Neil
    Member

    Can anybody explain to me how these chainrings help to stop the chain jumping off . I’m not disputing that they work but can’t understand why .

    Premier Icon rOcKeTdOg
    Subscriber

    fairy magic

    Premier Icon singlespeedstu
    Subscriber

    In very basic terms they stop the chain moving around on the ring and falling off.

    Edit. A bit of witchcraft may also be at work. 😉

    Premier Icon Northwind
    Subscriber

    It is weird isn’t it. Basically all it is, is they stop the chain moving around as much, so even though it’s not stopping it moving in the directions that’d cause it to come off, there’s less movement/energy in the system- it doesn’t build up enough bounce to bounce off.

    TBH I didn’t really believe in it til I tried one.

    Ramsey Neil
    Member

    Thank you for that , it makes sense but if that’s the case why not have a thick thick chainring ?

    antares
    Member

    Coz the gaps in the chain go thick thin

    wukfit
    Member

    That’s too thick Neil,
    Narrow wide chain rings are built with a fat tooth, thin tooth, fat tooth, thin tooth etc.
    The chain will then sit on it only in a certain way, giving less movement and therefore less chance of bouncing off
    I’m sure someone can, and will, describe it better

    Ramsey Neil
    Member

    I don’t know that sounds pretty good to me .

    Ramsey Neil
    Member

    Coz the gaps in the chain go thick thin

    Yeah I know but the thin links in the chain won’t always correspond to the thin teeth on the chainring . Will they ?

    wukfit
    Member

    On a 1×10 setup yes, yes they will, because the chain never comes off the chainring

    dabble
    Member

    yes they will, unless you’ve got odd teeth number, which i dont think they do (happy to be proven wrong)

    edit-musttypefaster

    Premier Icon theotherjonv
    Subscriber

    Yes, they alternate, as do the chain links. Why wouldn’t they?

    [Edit] and as above, you obviously can only get even numbered rings

    antares
    Member

    Yeah I know but the thin links in the chain won’t always correspond to the thin teeth on the chainring . Will they ?

    Err why not?

    patriotpro
    Member

    Coz the gaps in the chain go thick thin

    Just like the gaps in the chain-links do funnily enough.

    Ramsey Neil
    Member

    Yes it’s all clear to me now . Thank you , this place can be great sometimes .

    Premier Icon singlespeedstu
    Subscriber

    On a 1×10 setup yes, yes they will, because the chain never comes off the chainring

    It’ll work on a 1xanything setup.
    The number of gears on the rear has no bearing on it at all.

    robhughes
    Member

    stu.I,ve mailed you about that ks post you where after

    Premier Icon singlespeedstu
    Subscriber

    rob just mailed you back.

    Premier Icon mattjg
    Subscriber

    I just switched my geared thick-thin drivetrain to SS, and was about to put a half link to get the chain length right.

    Oh.

    robarnold
    Member

    Joining the 1×10 revolution Neil? Did the impossible hill three times today on my single ring set up before my legs stopped working. Turns out it should be renamed

    dannyh
    Member

    The teeth are also a bit taller than a regulation chainring (they can afford to be if the chain doesn’t need to come off of the ring to shift).

    Anyhow, these things WORK! Pair it with a clutch mech and you will enter drivetrain heaven. Almost noiseless descending no matter how rough, and the chain will still be there to pedal away afterwards.

    Premier Icon singlespeedstu
    Subscriber

    was about to put a half link to get the chain length right.

    😆

    At least you stopped yourself actualy doing it.

    wobbliscott
    Member

    Go on, i’ll have a stab at it….I think the clutch mech maintains chain tension which us a significant help. However in a slow mo video I saw the way a chain is dropped is as it waggles up and down there is also a sideways waggle so when you put in a pedal rev the sideways waggle causes the chain to derail. With a thick thin ring the better lateral engagement due to half of the link now filling the gaps in the wider links the sideways waggle is also reduced. Anyway i’m guessing, but as said before, they work!

    Ramsey Neil
    Member

    Joining the 1×10 revolution Neil? Did the impossible hill three times today on my single ring set up before my legs stopped working. Turns out it should be renamed

    I think you did the hill of death in Ballure . the Impossible hill goes from Glen Auldyn to the top of Brookdale .
    If you can clean the impossible hill 3 times with a 1×10 set up in a single morning I will eat all of my bikes .

    robarnold
    Member

    I think you did the hill of death in Ballure . the Impossible hill goes from Glen Auldyn to the top of Brookdale .
    If you can clean the impossible hill 3 times with a 1×10 set up in a single morning I will eat all of my bikes .

    I stand corrected. Said the man in the orthopaedic shoe

    Premier Icon kelvin
    Subscriber

    Anyhow, these things WORK! Pair it with a clutch mech and you will enter drivetrain heaven. Almost noiseless descending no matter how rough, and the chain will still be there to pedal away afterwards.

    Agreed. Surprised. Pleased. Converted.

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