1. What is MTB Reach?

Reach is a key measurement in mountain bike geometry that represents the horizontal distance from the bottom bracket to the top of the head tube. It helps determine how stretched out or upright a bike's riding position will be.

2. How Does the Calculator Work?

The calculator uses the Reach formula:

Where:

• \( \text{Effective Top Tube} \) — Horizontal distance from head tube to seat tube (mm)
• \( \text{Head Tube Length} \) — Vertical length of the head tube (mm)
• \( \text{Head Angle} \) — Angle of the head tube from horizontal (degrees)

Explanation: The formula accounts for both the frame's top tube length and how the head angle affects the forward position of the handlebars.

3. Importance of Reach Measurement

Details: Reach affects bike handling and rider comfort. Longer reach creates a more stretched position for aggressive riding, while shorter reach offers more upright comfort.

4. Using the Calculator

Tips: Enter Effective Top Tube and Head Tube Length in millimeters, Head Angle in degrees. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical reach measurement?
A: Reach varies by bike size and style, but generally ranges from 400mm (small XC bikes) to 520mm (large enduro bikes).

Q2: How does reach compare to top tube length?
A: Reach is generally shorter than effective top tube length, especially with slack head angles.

Q3: Why is head angle important in reach calculation?
A: Slacker head angles (lower numbers) push the front wheel further forward, effectively reducing reach.

Q4: How does reach affect bike handling?
A: Longer reach provides more stability at speed but can feel stretched, while shorter reach offers quicker handling but less stability.

Q5: Should I choose a bike based on reach?
A: Reach is one of several important measurements. Consider stack, wheelbase, and your riding style when choosing a bike.