Thread: Deriving trail from partial data
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Old 02-09-18 | 07:25 PM
  #23  
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Originally Posted by fietsbob
Physical measurement of bike in front of you?

Head Tube Angle axis line, crosses Axle plumb line down to the ground , above the ground plane.

the distance between those 2 points is Trail..
I challenge anyone to accurately extend the head tube axis line to the ground. Your suggestion is completely impractical.
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