Mountain Bikes · Public discussion

Chainwheel teeth uneven spacing and shape ?

Started by Tb · · Last activity · 4 posts · 1,254 views

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Mountain Bikes
Published
18 February 2003
Last activity
20 February 2003
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Tb
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  1. Hi, I recently purchased 2 new Shogun Trailbreaker 2 mountain bikes, the other day I noticed that
    some of the teeth on the front chainwheels appear to be unevenly spaced and not a consistent shape.
    This appears to be more prominent on the central chainwheel where some of the teeth are shaped like
    shark fins, others are a normal symmetrical triangle shape and some appear to have a rounded top.
    The small chainwheel appears to have consistent and evenly spaced teeth, the largest chainwheel has
    two adjacent teeth which have a rounded top. I was able to locate information on Hyperglide, but
    the information on Hyperglide appears to relate only to the back gears, I haven't been able to
    locate any information relating to the front chainwheels. Any assistance would be greatly
    appreciated. Thanks

    Tony

  2. TB said:

    Hi, I recently purchased 2 new Shogun Trailbreaker 2 mountain bikes, the other day I noticed that
    some of the teeth on the front chainwheels appear to be unevenly spaced and not a consistent
    shape. This appears to be more prominent on the central chainwheel where some of the teeth are
    shaped like shark fins, others are a normal symmetrical triangle shape and some appear to have a
    rounded top. The small chainwheel appears to have consistent and evenly spaced teeth, the largest
    chainwheel has two adjacent teeth which have a rounded top. I was able to locate information on
    Hyperglide, but the information on Hyperglide appears to relate only to the back gears, I haven't
    been able to locate any information relating to the front chainwheels. Any assistance would be
    greatly appreciated. Thanks

    Um, was there a question? Yes, your chain rings are supposed to be like that - it improves shifting.

    --
    a.m-b FAQ: t-online.deambfaq.htm

    b.bmx FAQ: t-online.debmx faq.htm

  3. TB <[email hidden]> wrote in message "]news:[email hidden]...

    Quoted message said:

    Hi, I recently purchased 2 new Shogun Trailbreaker 2 mountain bikes, the other day I noticed
    that some of the teeth on the front chainwheels appear to be unevenly spaced and not a
    consistent shape. This appears to be more prominent on the central chainwheel where some of the
    teeth are shaped


    like

    Quoted message said:

    shark fins, others are a normal symmetrical triangle shape and some appear to have a rounded top.
    The small chainwheel appears to have consistent and evenly spaced teeth, the largest chainwheel
    has two adjacent teeth which have a rounded top. I was able to locate information on Hyperglide,
    but the information on Hyperglide appears to relate only to the back gears, I haven't been able


    to

    Quoted message said:

    locate any information relating to the front chainwheels. Any assistance would be greatly
    appreciated. Thanks

    If they are new rings, it will be that some teeth are a little different to (supposedly) work in
    conjunction with the ramps and pegs in the chain ring, to give cleaner shifting.

    Shaun aRe

  4. "Shaun Rimmer" <[email hidden]> wrote in message
    "]news:[email hidden]...

    Quoted message said:


    TB <[email hidden]> wrote in message "]news:[email hidden]...

    Quoted message said:

    Hi, I recently purchased 2 new Shogun Trailbreaker 2 mountain bikes, the


    other

    Quoted message said:
    Quoted message said:

    day I noticed that some of the teeth on the front chainwheels appear to


    be

    Quoted message said:
    Quoted message said:

    unevenly spaced and not a consistent shape. This appears to be more prominent on the central
    chainwheel where some of the teeth are shaped


    like

    Quoted message said:

    shark fins, others are a normal symmetrical triangle shape and some


    appear

    Quoted message said:
    Quoted message said:

    to have a rounded top. The small chainwheel appears to have consistent


    and

    Quoted message said:
    Quoted message said:

    evenly spaced teeth, the largest chainwheel has two adjacent teeth which have a rounded top. I
    was able to locate information on Hyperglide, but the information on Hyperglide appears to
    relate only to the back gears, I haven't been able


    to

    Quoted message said:

    locate any information relating to the front chainwheels. Any assistance would be greatly
    appreciated. Thanks

    If they are new rings, it will be that some teeth are a little different


    to

    Quoted message said:

    (supposedly) work in conjunction with the ramps and pegs in the chain


    ring,

    Quoted message said:

    to give cleaner shifting.

    Shaun aRe

    Last year I bought some Pace chainrings (damn, they were cheap!!!) to fit a Syncros crankset (which
    was also damn cheap). The Pace rings have no cunning profiling and shift pins a la HyperGlide, and
    being used to HyperGlide rings I was a tad apprehensive about wether or not shifting was going to be
    any good. And it was. Flawless. And it still is.

    To the OP, as Bomba and Rimmer said, the funny shaped teeth are normal. Though they threw me when I
    first got a hyperglide equipped bike.

    To coin a JDism, "Hype-Glide?" Possibly.

    Andy Chequer

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