1. What is Stack and Reach?

Stack and Reach are key measurements in bicycle geometry that define the rider's position. Stack is the vertical distance from the bottom bracket to the top of the head tube, while Reach is the horizontal distance between these two points.

2. How Does the Calculator Work?

The calculator uses trigonometric formulas:

Where:

• \( A \) and \( B \) — Component measurements (mm)
• \( \theta \) — Angle between components (degrees)
• \( \sqrt{(A)^2 + (B)^2} \) — Hypotenuse length

Explanation: The formulas calculate vertical and horizontal components based on the hypotenuse length and angle.

3. Importance of Stack and Reach

Details: Proper Stack and Reach measurements are crucial for bike fitting, ensuring comfortable riding position, optimal power transfer, and preventing injuries.

4. Using the Calculator

Tips: Enter accurate measurements A and B in millimeters, and the angle in degrees. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Stack and Reach?
A: Stack measures vertical distance while Reach measures horizontal distance from bottom bracket to head tube top.

Q2: Why are these measurements important?
A: They determine your riding position, affecting comfort, aerodynamics, and power efficiency.

Q3: What are typical Stack and Reach values?
A: Values vary by bike type and frame size. Road bikes typically have lower Stack and longer Reach than endurance bikes.

Q4: How do I measure A and B accurately?
A: Use precise measuring tools and ensure measurements are taken from correct reference points on the frame.

Q5: Can Stack and Reach be adjusted?
A: Yes, through stem length, spacer height, and handlebar adjustments, but frame geometry is fixed.