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  1. #1
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    Aug 2005
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    ISO Square crank and Cotterless crank

    Can anyone tell me what's the different?

    thanks

  2. #2
    Senior Member mtbikerinpa's Avatar
    Join Date
    Dec 2004
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    PA
    My Bikes
    92 Giant Sedona ATX Custom
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    Cotterless crank is the generic for all types that do not have a cottering wedge bolt retaining the arm onto the bottom bracket. There are a couple of varieties of square-taper spindles however. ISO taper is one of them. To cross types is frowned upon and is generally detrimental to the parts, so it is good to know which is which.
    Aviation Mechanic, Bike racer, Fitness Equipment Restorer

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