• not sure if m6 would hold the wheel enough to prevent it slipping in the dropouts….

    Probably not. All my M6 bolted rears also have chain tugs.

  • Thanks for the reply…still keen on it so I can leave my wrench at home when riding fixed. Is there a tester approved chain tug?

  • Is there a tester approved chain tug?

    There is (Fireeye ASP), but they don't make them any more. You need something which actually engages the axle, which usually means a projecting lug inside the axle slot, e.g. DMR. If there's nothing in the slot ahead of the axle, you need to size your axles to end outside the track ends

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