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  1. #1
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    New Bike,Rockhopper Expert Disc,chainring,cassett

    Purchased above bike couple weeks back. Upon cleaning after my last ride, I noticed several teeth on the chainrings and cassett gears looked like a sharks tooth. Im probably wrong, have a lot to learn but isnt this a sign of wear??? I thought the teeth were more square looking, and most are, just a few in different spots on the ring are rounded,pointed looking.
    Bike shifts well, chain doesnt skip. Of course I dont push it to any extreme, Im old and take my time for the most part,lol.
    I hope this is normal.
    Thanks,
    John

  2. #2
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    That is by design. Shimano does that to make them shift better. I think they call it "Hyperglide".
    MUD


    My weiner is 10.5".....Oh wait...I'm holding this ruler backward.

  3. #3
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    Thanks

    Thanks for the response. I told my friend what I found and he didnt know for sure but stated it was probably designed that way.
    Thanks!!!
    John

  4. #4
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    Assuming the bike is....

    a "new" purchase, not used, you are likely looking at the profiled teeth that Shimano and others design into the rings to assist shifting. If they look like a sharks tooth, that's good. It's when they start looking like a sharks dorsal fin that you worry about it.

    Good Dirt
    "I do whatever my Rice Cripsies tell me to!"

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