Understanding the horizontal reach of a road or mountain bike is essential for comfort, power transfer, and handling. Reach determines how stretched out a rider sits, influencing aerodynamic position and joint stress.
The most reliable way to estimate a personalized reach is by measuring the rider’s torso length and arm length. Torso length is measured from the C7 vertebra to the floor while standing upright; arm length is measured from the shoulder joint to the tip of the middle finger.
By applying the weighted sum of these two measurements, the calculator provides a reach value that aligns with most bike geometry standards, allowing cyclists to select frames that match their biomechanical needs.
What is bike fit reach?
How do I measure my torso length?
How do I measure my arm length for bike fit?
Why is reach important in bike fitting?
Can I adjust my bike fit based on this calculator?
What is the difference between road bike and mountain bike reach?
How often should I recalculate my bike fit reach?
Results are for informational purposes only and do not constitute professional advice.