1. What is Tire Pressure Calculation?

Definition: This calculator determines the optimal tire pressure based on the weight carried by each tire and the tire's load capacity constant.

Purpose: It helps vehicle owners and mechanics set proper tire pressure for safety, performance, and tire longevity.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Tire pressure (psi)
• \( W \) — Weight per tire (lbs)
• \( C \) — Tire constant (lbs/psi from manufacturer specs)

Explanation: The weight carried by each tire is divided by the tire's load capacity constant to determine the optimal pressure.

3. Importance of Correct Tire Pressure

Details: Proper tire pressure ensures even tire wear, better fuel efficiency, improved handling, and prevents blowouts.

4. Using the Calculator

Tips: Enter the weight carried by each tire in pounds and the tire constant (default 30 lbs/psi for passenger vehicles). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where do I find the tire constant?
A: Check your tire's sidewall or manufacturer specifications. Common values are 30 for cars, 35-40 for SUVs, and higher for trucks.

Q2: How do I measure weight per tire?
A: Weigh your vehicle fully loaded at a weigh station, then divide by 4 (for 4 tires) or the number of tires on that axle.

Q3: Should I use this for cold or warm tires?
A: Always check and adjust pressure when tires are cold (not driven for 3+ hours).

Q4: What if my tires have different pressures?
A: Front and rear tires often carry different weights - calculate separately for each axle.

Q5: Does this replace manufacturer recommendations?
A: No, use this as a starting point but never exceed max pressure on tire sidewall.