Tire Pressure Calculator
Get the recommended PSI for your tires based on size, load, position, and temperature. See how proper inflation saves you money on fuel and extends tire life.
Tire Details
Max rated load for this tire: 6,175 lbs
Fleet & Cost Details
Recommended PSI
103
For steer tires at 70°F
Temperature Adjustment
+0 PSI
Baseline temperature
Annual Savings from Proper Inflation
$2,428
vs. running 15 PSI under-inflated
Pressure Breakdown
Base PSI for 295/75R22.5110 PSI
Load adjustment (89% of max)98 PSI
Temperature correction (70°F)+0 PSI
Steer position bonus+5 PSI
Final Recommended103 PSI
Cost Savings Breakdown
Annual fuel cost$97,052
Fuel savings (1.5%)$1,456/yr
Normal tire replacement cost/yr$6,480
Under-inflated replacement cost/yr$7,452
Tire life savings$972/yr
Total Annual Savings$2,428/yr
Pro Tip
Always check tire pressure when tires are cold (before driving or at least 3 hours after). Pressure increases 1-2 PSI per 10 minutes of driving. The ideal range for steer tires is 100-120 PSI.
Frequently Asked Questions
Most semi truck tires run between 90-120 PSI depending on position, load, and tire size. Steer tires typically need 100-120 PSI for proper handling, while drive and trailer tires run 90-110 PSI. The correct pressure depends on the actual load each tire carries — check the tire manufacturer's load/inflation table for exact recommendations.
Tire pressure changes approximately 2 PSI for every 10 degrees Fahrenheit change in ambient temperature. In cold weather, pressure drops — so a tire inflated to 100 PSI at 70°F will read about 90 PSI at 20°F. Always check and set pressure when tires are cold (before driving or after sitting 3+ hours). Running in hot weather naturally increases pressure.
Under-inflated tires increase rolling resistance, which directly burns more fuel. Research shows approximately 1% more fuel consumption for every 10 PSI below the recommended pressure. For a truck running 120,000 miles per year at 6.5 MPG and $5.26/gallon (EIA, week of August 10, 2026), running 15 PSI low burns about 1.5% more fuel — roughly $1500+ per year in fuel alone.
Check tire pressure at minimum during every pre-trip inspection — ideally with a calibrated gauge, not just a thump test. The FMCSA requires drivers to inspect tires during pre-trip, but many fleets also use tire pressure monitoring systems (TPMS) for real-time alerts. Pressure should always be checked cold for accurate readings.
Steer tires typically run 5-10 PSI higher than drive tires because they handle the full steering load and must maintain precise responsiveness. Under-inflated steer tires cause poor handling, uneven wear, and increased stopping distance. Drive tires can run slightly lower since they share the load across a tandem axle and need traction rather than precision steering.