Calculating Top Speed, 4 & 2 Stroke Engines

  • Thread starter Deleted Member 4613
  • Start date
I measured the Circumference of my 26" wheel (tire tread) and it come out to 83 1/2" Circumference Measure with a string
But If I just go 26 x 3.14 = 81.64" Circumference
Circumferences vary, depending on the type of tire used, AND the amount of tire wear.
 
Right, there might be some deflection when
sitting on the bike which will lower the calculation
a bit.
 
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