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  • everyone calling for the wheel to be slammed, far back is more aero. If it's good Enough for Gregory etc

  • Look have tested it and found a gap to be more aero.

    I forget the exact deets/tech terms, but broadly speaking as the air attached to the tyre is pulled into the gap, if it's too tight then it stalls as it's squeezed out.

  • Scilly is right, and about 10-12mm gap is optimal.

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