1. What is the SRAM AXS Tire Pressure Calculator?

Definition: This calculator estimates optimal tire pressure based on rider+bike weight, tire contact area, and SRAM's AXS-specific factor.

Purpose: Helps cyclists achieve ideal tire pressure for performance, comfort, and efficiency using SRAM's AXS technology.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Recommended tire pressure (psi)
• \( W \) — Combined rider and bike weight (lbs)
• \( A \) — Tire contact area (square inches)
• \( F \) — AXS-specific factor (default 1.2)

Explanation: The weight is divided by contact area to get base pressure, then multiplied by AXS factor for system-specific optimization.

3. Importance of Proper Tire Pressure

Details: Correct pressure ensures optimal power transfer, ride comfort, tire longevity, and AXS system performance.

4. Using the Calculator

Tips: Enter total weight (rider + bike), typical tire contact area (default 0.25 sq in), and AXS factor (default 1.2). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why does AXS need different tire pressure?
A: AXS systems benefit from slightly higher pressures for optimal electronic shifting performance and battery efficiency.

Q2: How do I measure tire contact area?
A: Place bike on hard surface, measure tire flattening width and length, then multiply (width × length × 0.8).

Q3: When should I adjust the AXS factor?
A: Increase (1.3-1.4) for racing or smooth surfaces; decrease (1.0-1.1) for rough terrain or comfort-focused rides.

Q4: Does this work for all tire widths?
A: Yes, but wider tires typically have larger contact areas, resulting in lower pressures for same weight.

Q5: How does temperature affect pressure?
A: Tire pressure changes ~1 psi per 10°F temperature change - check pressures at ride temperature.