DBDirt Bike Finder
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Performance

Dirt Bike Speed vs RPM Calculator

Build a speed table for one gear across the rev range. Use it to see where a shift lands or how a sprocket change moves road speed.

Inputs
Results
Live

  • Speed at mid-range

    41.17mph

  • Speed at redline

    65.87mph

  • Overall ratio

    14.85:1

Table
RPMmphkm/h
300016.526.5
40002235.3
500027.444.2
600032.953
700038.461.8
800043.970.7
900049.479.5
1000054.988.3
1100060.497.2
1200065.9106

Formula

mph = (RPM × tire Ø) / (overall × 336)

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