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  1. #1
    That guy from the Chi Chitown_Mike's Avatar
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    Such thing as "lead in teeth" or do I have chipped teeth?

    See the pictures, but I know it is hard to see but some of my rear gears have the top nipped off, almost like a lead in tooth and they all seem to be evenly spaced on the gear sprocket. So is there such thing as "lead in teeth" that make gear shifting quieter and smoother or am I just thinking up magical things.

    If you look closely at the side pic you'll see the shorter teeth, and then on the above pic you'll see a narrow slanted top on some and the stubby, flat top on others. The stubby and flat ones are the shorter teeth.

    Any help is appreciated!

    Here are some pics:
    I20120927_123955.jpg

    IMG_20120927_124259.jpg

  2. #2
    Senior Member demoncyclist's Avatar
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    Yes, the teeth are shaped and twisted to make shifting smoother, especially under power. Newer systems than yours have ramps built into the cogs as well to help guide the chain.
    DEMON

    Satanic Mechanic
    STAR 3 Spinning Instructor

    2011 Lynskey Sportive (Shimano Ultegra 10s)
    1988 Cannondale SM400 (Suntour XC-M 7s)

  3. #3
    That guy from the Chi Chitown_Mike's Avatar
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    Quote Originally Posted by demoncyclist View Post
    Yes, the teeth are shaped and twisted to make shifting smoother, especially under power. Newer systems than yours have ramps built into the cogs as well to help guide the chain.
    That's what I was thinking looking at new gears online but couldn't find a definite answer. I greatly appreciate it DC!

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