1. What is Bike Tyre Pressure Calculation?

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

Purpose: It helps cyclists determine the proper tyre pressure for their weight and bike setup, which affects comfort, rolling resistance, and puncture protection.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Tyre pressure (psi)
• \( W \) — Total weight (kg) of rider + bike + cargo
• \( F \) — Tyre factor (dimensionless, typically 0.033 for road bikes)

Explanation: The total weight is divided by twice the tyre factor (for two tyres) to determine the optimal pressure.

3. Importance of Proper Tyre Pressure

Details: Correct tyre pressure ensures optimal performance, comfort, and safety. Too low pressure increases rolling resistance and puncture risk, while too high reduces grip and comfort.

4. Using the Calculator

Tips: Enter the total weight in kg and tyre factor (default 0.033 for road bikes). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the tyre factor and how do I find it?
A: The tyre factor represents tyre volume and stiffness. Typical values: 0.033 (road), 0.040 (gravel), 0.050 (MTB). Check manufacturer recommendations.

Q2: Should front and rear tyres have the same pressure?
A: No, rear tyre typically needs 10-15% more pressure due to weight distribution (about 60% on rear wheel).

Q3: How does tyre width affect pressure?
A: Wider tyres require lower pressure. The tyre factor accounts for this - wider tyres have higher factors.

Q4: Should I adjust for different surfaces?
A: Yes, reduce pressure by 10-20% for rough surfaces (gravel, trails) for better traction and comfort.

Q5: How often should I check tyre pressure?
A: Before every ride, as tyres naturally lose 1-2 psi per day and temperature changes affect pressure.