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  • Ultimately the best solution to keep a rear brake aligned on a fixed wheel bike is to use a rear disc brake and sliding dropouts.

    There is a much simpler solution.

    The forward opening dropouts which were a standard feature on road frames for many decades (say 1910 - 1980, at least) are angled down towards the front. This is precisely to maintain the correct angle of the brake blocks (pads if you will) as the wheel moves in the
    fork end.

    The attached pic of my Gillott shows this angle - I could find a clearer example, but I happen to have this one conveniently to hand.

    A question: for non track use, can anyone explain why it is better to have rearward opening ends for fixed?

    I can see disadvantages (eg: with mudguards it's difficult to get the wheel out to change a punctured tube), but no real advantages.

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