Hamley Method Calculator
Targets 25-30° knee flexion at bottom of pedal stroke. More leg extension for maximum power output.
Conservative approach with less leg extension. Reduces knee strain and suits varied riding styles.
How to measure: Stand barefoot with your back against a wall. Place a book between your legs as high as comfortable (mimicking a saddle). Measure from the top of the book to the floor.
The Hamley method is an alternative approach to saddle height calculation that aims for approximately 25-30 degrees of knee flexion at the bottom of the pedal stroke. This formula is based on biomechanical research and is favored by many professional bike fitters.
Like the LeMond method, this measurement is taken from the center of the bottom bracket to the top of the saddle, following the seat tube angle.
The Hamley method (1.09) typically produces a saddle height approximately 2-3 cm higher than the LeMond method (0.883) for the same rider.
Hamley targets a specific knee angle (25-30°) at the bottom of the pedal stroke, while LeMond uses a fixed percentage of inseam.
Both are starting points that may suit different riding styles and biomechanics. Your ideal height may fall between the two methods.
Calculate your height using both methods and test ride at each position. Your ideal height may fall somewhere in between.
Have someone record you from the side while pedaling. At the bottom of the pedal stroke, your knee should have a slight bend (approximately 25-30 degrees). If your leg is completely straight or your hips rock, your saddle is too high.