1. What is Bike Stack and Reach?

Stack and Reach are two key measurements that define a bike's geometry. Stack is the vertical distance from the bottom bracket to the top of the head tube. Reach is the horizontal distance from the bottom bracket to the top of the head tube.

2. How Does the Calculator Work?

The calculator uses the stack and reach values to determine the stack/reach ratio:

Where:

• \( \text{Stack} \) — Vertical distance in millimeters
• \( \text{Reach} \) — Horizontal distance in millimeters

Explanation: The ratio helps determine the bike's riding position - higher ratios indicate more upright positions, lower ratios indicate more aggressive, stretched-out positions.

3. Importance of Stack and Reach

Details: These measurements are crucial for bike fitting as they determine your riding position. They're more consistent across different bikes than traditional sizing methods.

4. Using the Calculator

Tips: Enter stack and reach values in millimeters from your bike's geometry chart. The calculator will show the ratio and suggest the bike type.

5. Frequently Asked Questions (FAQ)

Q1: What's a good stack/reach ratio?
A: For endurance bikes: >1.5, all-round bikes: 1.4-1.5, race bikes: <1.4.

Q2: How do I find my bike's stack and reach?
A: Check the manufacturer's geometry chart - these are standard measurements.

Q3: Can I compare different bikes using this?
A: Yes, stack and reach allow direct comparison between different bike models and brands.

Q4: What if my ratio doesn't match my bike type?
A: You may need adjustments (stem length, spacers) to achieve your desired fit.

Q5: Does wheel size affect stack and reach?
A: No, these measurements are frame-specific and independent of wheel size.