1. What is an MTB Tyre Pressure Calculator?

Definition: This calculator estimates the optimal tyre pressure for mountain biking based on rider weight, tyre width, terrain type, and wheel system.

Purpose: Helps mountain bikers find the ideal pressure for their setup to balance grip, rolling resistance, and puncture protection.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Recommended tyre pressure (PSI)
• \( W \) — Rider weight (kg)
• \( F \) — Wheel system factor
• \( T \) — Tyre width (inches)
• \( S \) — Terrain/suspension factor

Explanation: The formula accounts for weight distribution, tyre volume, and riding conditions to suggest appropriate pressure.

3. Importance of Proper Tyre Pressure

Details: Correct pressure improves traction, reduces rolling resistance, prevents pinch flats, and enhances ride comfort.

4. Using the Calculator

Tips: Enter your weight in kg, actual tyre width (not sidewall marking), select your typical terrain, and wheel system type.

5. Frequently Asked Questions (FAQ)

Q1: Why does tyre width affect pressure?
A: Wider tyres have more air volume and can run lower pressures while maintaining support.

Q2: Should front and rear pressures be the same?
A: Typically, rear pressure is 2-4 PSI higher due to weight distribution (not accounted for in this calculator).

Q3: How does tubeless affect pressure?
A: Tubeless systems can run 5-10 PSI lower than tube-type due to eliminated pinch flat risk.

Q4: When should I adjust from the calculated pressure?
A: Adjust based on personal preference, specific trail conditions, or if experiencing rim strikes/tyre squirm.

Q5: Does this work for plus-size or fat bikes?
A: No, these require different calculations due to their much larger air volumes.