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  1. Z

    Replacement steel gear

    Thank you for your input. I appreciate it. The "why" is easy to answer. It is because we have been asked to make them, by others. To be fair, some of this is from individuals that are racing them. However, a fair amount of them are also due to people encountering failures. As for metal gears...
  2. Z

    Replacement steel gear

    Greetings, I've been doing some research which has led me to this specific thread, and I'd like to make some inquiries of you that are participating within this thread. First, some background - I have in the past made a number of gears and gear trains for e-bikes, from Spur, to Helical, and...