1. What is a Bicycle Tyre Pressure Calculator?

Definition: This calculator estimates the optimal tyre pressure based on total weight (rider + bike), tyre width, and terrain type.

Purpose: It helps cyclists determine the ideal tyre pressure for comfort, performance, and safety based on their specific setup.

2. How Does the Calculator Work?

The calculator uses a proprietary formula:

Where:

• \( P \) — Tyre pressure (bar)
• \( W \) — Total weight (rider + bike in kg)
• \( W_t \) — Tyre width (mm)
• \( T_f \) — Terrain factor (1.0 for road, 1.2 for mixed, 1.5 for off-road)

Explanation: The formula balances weight distribution across the tyre contact patch while accounting for different terrain requirements.

3. Importance of Proper Tyre Pressure

Details: Correct tyre pressure affects rolling resistance, grip, comfort, and puncture protection. Too high reduces traction and comfort, too low risks pinch flats.

4. Using the Calculator

Tips: Enter your total weight (including bike), tyre width in millimeters, and select your primary terrain type. The calculator provides a recommended starting pressure.

5. Frequently Asked Questions (FAQ)

Q1: Why does tyre width affect pressure?
A: Wider tyres distribute weight over a larger area, requiring lower pressure for the same load compared to narrow tyres.

Q2: How accurate is this calculator?
A: It provides a good starting point, but fine-tune based on personal preference and specific conditions.

Q3: Should I use the same pressure front and rear?
A: Typically, rear pressure is 10-15% higher due to weight distribution, but this is accounted for in total weight.

Q4: How does terrain affect pressure?
A: Rough terrain benefits from slightly lower pressure for better traction and comfort, while smooth roads allow higher pressure for efficiency.

Q5: What about tubeless setups?
A: Tubeless tyres can often run 10-15% lower pressure than tubed tyres for the same conditions.