• For a rim brake there is two points on the wheel where forces are being transmitted between the fork and wheel. The rim (via brake) and the hub (via spokes).

    This is why disc brake forks require stronger forks as all the braking forces are via the bottom of the fork and forces transmitted to the tyre via the spokes....

    or at least this is how I understand it.

  • This is why disc brake forks require stronger forks

    Yes, the fork loading is very different. The spoke loading is generated differently, but the end result isn't much different in magnitude.

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