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17 Comments

  1. vancouverprofile on

    Back in the day they called those things a braze-on front derailleur mount. I would put a chain catcher or chain guide on yours since you don’t have a front mech to prevent your chain jumping off.

  2. first-alt-account on

    It is the platform for which you can improve your bike immensely by riding it with 2 chainrings.

  3. TitaniumladNZ on

    Why do people not bother to find out answers to questions for themselves?

  4. BicyclesRuleTheWorld on

    In the old days there used to be a device there that allowed you to have a proper chainline when climbing really steep hills.

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