1. What is the SRAM/Zipp Tyre Pressure Calculator?

Definition: This calculator provides optimal tyre pressure recommendations based on SRAM/Zipp's proprietary algorithm.

Purpose: Helps cyclists find the ideal tyre pressure for their weight, bike, tire width, and riding conditions.

2. How Does the Calculator Work?

The calculator uses SRAM/Zipp's formula:

Where:

• \( P \) — Recommended tyre pressure (psi)
• \( W \) — Total system weight (rider + bike in kg)
• \( R \) — Ride type coefficient (1.0-1.3)
• \( T \) — Tire width factor (1000/tire width in mm)

Explanation: The formula balances support (based on weight) with ride quality (based on tire width and conditions).

3. Importance of Proper Tyre Pressure

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

4. Using the Calculator

Tips: Enter your weight, bike weight, tire width, and select your typical ride type. The calculator suggests front and rear pressures.

5. Frequently Asked Questions (FAQ)

Q1: Why different pressures for different ride types?
A: Rougher surfaces require lower pressures for better traction and comfort, while smooth roads work better with higher pressures.

Q2: Should front and rear pressures be equal?
A: No, typically rear pressure is 5-10% higher due to weight distribution (about 60% rear, 40% front).

Q3: How does tire width affect pressure?
A: Wider tires can run lower pressures as the air volume increases, maintaining support while improving comfort.

Q4: When should I adjust from the recommended pressure?
A: Consider personal preference, road conditions, and tire casing. Tubeless setups can often run 5-15 psi lower.

Q5: Does this work for all tire brands?
A: While developed by SRAM/Zipp, the algorithm works well for most clincher and tubeless tires.