Whats this hole for?!?

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  • Whats this hole for?!?
  • mrjmt
    Member

    Built up my new Kona Dawg at the weekend and noticed a strange threaded hole…

    It can be seen in this pic just under the front mech clamp (not my frame but same unidentified hole):

    Anyone know what its for?!? 😯

    greeble
    Member

    floating brake arm

    aka Kona DOPE system

    http://www.pinkbike.com/photo/7046262/

    Steve-Austin
    Member

    clutch plate cover

    Premier Icon mintimperial
    Subscriber

    The optional sidecar.

    [Edit: damn, too slow. What’s that brake arm thing supposed to do then?]

    Premier Icon DezB
    Subscriber

    Oh yeah!

    blimey, there’s a lot going on on the back of that bike eh.

    Premier Icon matt_outandabout
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    Anti-overside wang-flapping protector stud.

    Premier Icon aracer
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    What’s that brake arm thing supposed to do then?

    Make the brake work almost as well as if it’s on a bike with a proper 4 bar back end.

    Premier Icon ricardo666
    Subscriber

    ploy to knock 100 grams off last years model ?

    Premier Icon mintimperial
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    Make the brake work almost as well as if it’s on a bike with a proper 4 bar back end.

    Heh, I see, thanks! 🙂

    Zedsdead
    Member

    It’s for the flux capacitor

    Premier Icon chakaping
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    Whoah, that CoilAir posted by dezb is a bit of a dawg!

    OP – lets see some more pics of your bike then.

    Premier Icon Rusty Spanner
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    mrjmt – Member

    Built up my new Kona Dawg at the weekend and noticed a strange threaded hole…

    Where did you get the frame from?

    I really enjoyed the play about I had one a few years ago.

    flow
    Member

    Make the brake work almost as well as if it’s on a bike with a proper 4 bar back end.

    Think you will find it is a proper four bar back end.

    mrjmt
    Member

    OP – lets see some more pics of your bike then.

    Thats not my bike, i’ve got one pic on my phone, i’ll find somewhere to host it and post it up.

    Where did you get the frame from?

    I really enjoyed the play about I had one a few years ago.

    From CRC in their half price kona frames thing theyve got at the moment.

    mrjmt
    Member

    Hope this works…

    I know the green hoses don’t go, just waiting for a little more cash flow to change them!

    bol
    Member

    It’s for the flux capacitor

    Or more accurately the faux compensator

    toys19
    Member

    Think you will find it is a proper four bar back end.

    Ahh I think this is a common misconception, let me help you to sort it out.

    Whilst I can’t see properly on the white bike, the green bike above is defo a single pivot. There is on straight unpivoted bar between the frame and the back wheel, therefore the back wheel will follow a circular arc whose radius is fixed at the length of that bar. All them other pivots will just change how the shock is compressed.

    Premier Icon aracer
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    Think you will find it is a proper four faux bar back end.

    Fauixed that for you

    Premier Icon D0NK
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    Think you will find it is a proper four bar back end.

    it’s not tho is it? It’s a faux bar, no pivot on the chainstay. AKA single pivot with linkage driven shock albeit now it looks like (from dezBs pic) a floating system now ala trek

    edit sorry slow typist here

    mrjmt
    Member

    Excellent, all the arguing about the linkage means nobody has noticed the amount of bird poop on my drive! 😆

    Premier Icon aracer
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    nobody has noticed the amount of bird poop on my drive

    Oh – I thought it was a bike.

    flow
    Member

    it’s not tho is it?

    Err no it is. Its the most simple version of the four bar design.

    http://mtobikes.com/four-bar-linkage/

    The most basic four bar linkage design is the ‘Faux Bar’

    Oh look, you’re wrong.

    toys19
    Member

    Luckily the people on here with brains don’t need to visit a website to know that its actually wrong. That makes you and the author of that site wrong. Although in his defence he states that “This linkage still has the axle mounted on a chainstay which is directly mounted to the mainframe via a pivot, exactly the same as a single pivot design, and so will have the same axle path characteristics”

    Which in anyone else’s language makes it a single pivot. Although we will forgive you as some people like to call a faux bar a four bar, even though its not. The clue is in the title (its the faux bit in case you missed that)..

    Anyway your link reminds me of this:

    “The trouble with quotes on the internet is that it’s difficult to discern whether or not they are genuine.”
    ? Abraham Lincoln 1843

    greeble
    Member

    faux – french for false.

    i.e. its a false.

    its a four bar fsr wanna be ( a single pivot linkage driven bike)

    Premier Icon aracer
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    Own a Kona by any chance, flow? Getting all defensive?

    james
    Member

    “people like to call a faux bar a four bar, even though its not”

    Unhelpfully I think this also includes Kona, or at least their marketing/advertising department

    Tim
    Member

    Think you will find it is a proper four bar back end.

    Its not. Its effectively a single pivot with a linkage driven shock.

    However its so close to a 4-bar that nobody really notices the difference.

    Nice bike. Enjoy it.

    clubber
    Member

    Such a promising thread title with such disappointing content 😉

    toys19
    Member

    James – where? I can’t find reference to either?

    mrjmt
    Member

    Think you will find it is a proper four bar back end.

    Its not. Its effectively a single pivot with a linkage driven shock.

    However its so close to a 4-bar that nobody really notices the difference.

    Nice bike. Enjoy it.

    Cheers mate.

    This thread is turning rather amusing tedious. 🙄

    mrjmt
    Member

    Such a promising thread title with such disappointing content

    The way its going I might just start a new one with a picture of a belly button. 😆

    Premier Icon DezB
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    It’s all about the Horst Link innit.
    Faux bar don’t have it whereas Four Bar do.

    Premier Icon DezB
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    That’ll confuse people who don’t read the whole thread 🙂

    mrjmt
    Member

    I’m sure that looks unusually deep…..

    flow – Member

    Think you will find it is a proper four bar back end.

    Presumably the designers think that too, otherwise they’d have fittings on it for a floating…

    Oh

    Premier Icon amedias
    Subscriber

    toys – I’m with you on this one, but they way I have explained it to the nay-sayers in the past is:

    > the faux-bar system is a 4 bar *linkage*

    > the fuax-bar system is NOT a 4 bar *suspension system*.

    ie:
    It is a 4-bar linkage, there are physically 4 bars in this arrangement.

    However the important element is where in the linkage the wheel is attached.

    On a faux-bar system the wheel is only ‘suspended’ by one of them, making it a single pivot suspension system, with linkage actuated shock.

    Using this explanation normally results in “ahhhhh, i see!”

    Premier Icon amedias
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    It’s all about the Horst Link innit.
    Faux bar don’t have it whereas Four Bar do.

    ah, but no, you don’t have to have a ‘horst’ pivot for it to be a 4-bar.

    The horst bit only refers to a very specific placement of the pivot. VPP/Maestro/DW/Lawwill are 4-bar suspension systems too, just arranged in a different way, and consequently give entirely different suspension characteristics.

    toys19
    Member

    amedias fair enough, except in the green bike above (the op’s image) there are only 3 bars? (unless you include the floating linkage)

    mrjmt
    Member

    thats not my image.

    Premier Icon amedias
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    there are only 3 bars

    frame = a bar
    rocker = a bar
    chainstay = a bar
    seatstay = a bar

    = 4, same as a FSR style horst 4-bar.

    if you think about it, on a Kona, all you’d have to do to make it a 4-bar is move the pivot from seatstay, to chainstay, but this doesn’t create any more ‘bars’.

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