Hint to Riddle #81: Tracks From A Two Wheeled Bike

81. The diagram shows the tracks from a two wheeled bicycle. Was the bicycle traveling from left to right or right to left?
Bicycle tracks A key step in identifying the direction of travel is to identify which wheel is which.

It's also nothing to do with the depth of the indents, or the cross over points.Bicycle tracks with tangents from back to front.

Consider the significance of the lengths BC and EF. What else might be the same length as this?

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