Bicycle Trail Calculator

What is Trail?

Trail is the horizontal distance between your bike's steering axis and the center of the front tire's contact patch. It's a hotly-debated topic among bike geeks these days -- some believe that it's a key factor which determines how a bicycle handles, especially with a front load. Learn more about trail and general frame geometry concepts over at Wikipedia.

Enter Your Geometry

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  • Tire Diameter
  • Tire Radius
  • Wheel Circumference
  • Trail
  • Wheel Flop
  • Mechanical Trail
bicycle diagram

Not sure what these mean? Here are some definitions:

Thanks to Gino for design help! Use the dual version to compare two bikes.