1. What is the SRAM Tyre Pressure Calculator?

Definition: This calculator provides recommended tyre pressure based on rider+bike weight, tyre width, and riding style.

Purpose: Helps cyclists optimize tyre pressure for better performance, comfort, and safety.

2. How Does the Calculator Work?

The calculator uses SRAM's proprietary formula:

Where:

• \( P \) — Recommended tyre pressure (bar)
• \( W \) — Combined rider and bike weight (kg)
• \( T \) — Tyre width (mm)
• \( F \) — Riding style factor

Explanation: The formula calculates base pressure then adjusts for riding style and conditions.

3. Importance of Proper Tyre Pressure

Details: Correct pressure affects rolling resistance, traction, puncture protection, and ride comfort.

4. Using the Calculator

Tips:

• Weigh yourself with your riding gear and bike
• Measure actual tyre width (printed size may differ)
• Select appropriate riding style

5. Frequently Asked Questions (FAQ)

Q1: Why does tyre width affect pressure?
A: Wider tyres distribute weight over more surface area, requiring lower pressure.

Q2: What's the 0.15 constant in the formula?
A: This is SRAM's empirically derived factor for optimal tyre deformation.

Q3: Should I use the same pressure front and rear?
A: Typically 1-2psi lower in front for better traction, but calculator gives baseline.

Q4: How often should I check my tyre pressure?
A: Before every ride, as tyres naturally lose pressure over time.

Q5: Does this work for tubeless setups?
A: Yes, but you may run 5-10% lower pressure than calculated.