Enter the saddle setback, arm length, and height of the cyclist into the calculator to determine the handlebar reach. This calculator can also evaluate any of the variables given the others are known.

Handlebar Reach Formula

The following formula is used to calculate the handlebar reach.

HR = S + (0.4 * A) - (0.267 * H)


  • HR is the handlebar reach (cm) S is the saddle setback (cm) A is the arm length (cm) H is the height of the cyclist (cm)

To calculate the handlebar reach, add the saddle setback to 40% of the arm length, then subtract 26.7% of the cyclist’s height.

What is a Handlebar Reach?

Handlebar reach is a measurement in bicycle geometry that refers to the distance from the center of the bottom bracket (the axle that holds the pedal cranks in place) to the center of the handlebars. This measurement is important for determining the rider’s comfort and control over the bike. A longer reach can provide more stability at high speeds, while a shorter reach can offer better control and maneuverability, especially at slower speeds.

How to Calculate Handlebar Reach?

The following steps outline how to calculate the Handlebar Reach using the given formula:

  1. First, determine the saddle setback (S) in centimeters.
  2. Next, determine the arm length (A) in centimeters.
  3. Next, determine the height of the cyclist (H) in centimeters.
  4. Using the formula HR = S + (0.4 * A) – (0.267 * H), substitute the values of S, A, and H into the formula.
  5. Finally, calculate the Handlebar Reach (HR) in centimeters.
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge:

Saddle setback (S) = 15 cm

Arm length (A) = 50 cm

Height of the cyclist (H) = 170 cm