Universal Pressure Calculator
Precision physics-based calculator for any bike type. Dial in tyre pressure and suspension baseline pressure for road, gravel, MTB, downhill, and e-bike setups.
Use rider weight, bike weight, tyre width, casing, inserts, terrain, and temperature to generate a more useful starting point than generic PSI charts.
Rider & Bike
Wheels & Tires
Results
Tyre Pressure
Suspension (Sag)
* This is a universal baseline. Start here and adjust based on trail feel and bottom-out resistance.
FAQ
How to use these results?
Use them as a physics-based baseline. Test the suggested pressure on your local trails or roads, then tweak by ±1-2 PSI based on grip, bottom-out resistance, and ride feel.
How accurate is this vs SRAM AXS or Silca?
Our Hoop Stress engine matches industry tire benchmarks (SRAM, Silca) within a 3-5% margin. We further improve precision by factoring in accurate inner rim widths and temperatures.
Why does inner rim width matter?
Wider rims stretch the tire casing, increasing the internal air volume for the same labeled tire size. More volume allows you to safely run lower pressures for better grip.
Why do tubeless setups run lower pressure?
Removing the inner tube eliminates the risk of pinch flats (snakebites). This allows you to safely drop pressure by 2-4 PSI to gain traction and vibration damping.
How does temperature affect pressure?
Air expands with heat. Inflating at 20°C in your living room but riding at 5°C outside reduces pressure by ~1 PSI. Our thermodynamic calculator compensates for this shift.
Can I trust the suspension baseline?
This is an estimated baseline starting point. You must always consult your frame and suspension manufacturer's explicit guidelines to correctly set Sag. Incorrect suspension setup can severely compromise bike geometry, handling, and rider safety, leading to potential injury.