AI Tire Pressure Tool
Bike Tire Pressure Calculator
Enter weight, bike type, and tire width to get front and rear PSI — personalized for your setup.
Bike Type
How to use the bike tire pressure calculator
Enter your total weight (rider, bike, and gear), pick your bike type, and set your tire width. The calculator returns separate front and rear PSI, because the rear tire carries about 60% of the load and needs more pressure. Fine-tune with tire setup (tubeless vs. tubed), casing, riding conditions, and temperature for a recommendation dialed to your exact setup.
Recommended tire pressure by bike type
Use this chart as a starting point, then let the calculator personalize it to your weight. Ranges assume an average 165 lb (75 kg) rider — go higher if you are heavier, lower if you are lighter.
| Bike type | Typical tire width | Pressure range |
|---|---|---|
| Road | 23–28 mm | 65–100 psi |
| Gravel | 35–45 mm | 30–45 psi |
| Mountain (XC/Trail) | 2.1–2.5" | 20–30 psi |
| Fat bike | 4–5" | 5–15 psi |
Always stay within the min/max pressure printed on your tire sidewall. Hookless road rims are capped at 73 psi (5 bar).
Frequently asked questions
What tire pressure should I run on my bike?
It depends on tire width and your total weight, but typical ranges are: road tires (23–28mm) 65–100 psi, gravel tires (35–45mm) 30–45 psi, mountain bike tires (2.1–2.5") 20–30 psi, and fat bike tires (4–5") 5–15 psi. Heavier riders run toward the top of each range. Always stay within the min/max printed on your tire sidewall.
Does rider weight affect tire pressure?
Yes. Total system weight — rider, bike, and gear — is the single biggest factor. As a rough guide, every 10 lb (4.5 kg) of extra weight adds roughly 1–2 psi to the ideal pressure. This calculator uses your combined weight to split front and rear pressure, since the rear tire carries about 60% of the load.
Is lower or higher tire pressure better?
Lower pressure increases the contact patch, improving grip and comfort on rough surfaces, but too low risks pinch flats and squirmy handling. Higher pressure lowers rolling resistance on smooth pavement but transmits more vibration and can lose traction. The fastest pressure is the lowest one that still protects the rim and feels stable for your terrain.
What pressure should I run for tubeless tires?
Tubeless setups let you safely run 5–10 psi lower than tubed tires because there is no inner tube to pinch-flat. This is why tubeless is popular for gravel and mountain biking, where lower pressure means more traction. Note that hookless road rims are capped at 73 psi (5 bar) regardless of tire width.
How does temperature affect tire pressure?
Tire pressure rises and falls with temperature by roughly 2% for every 10°F (5.5°C) change. A tire pumped to 30 psi in a 70°F garage will read closer to 27 psi on a 35°F winter ride, so check pressure at the temperature you actually ride in.
Is this a tyre pressure calculator by weight?
Yes. This bicycle tyre pressure calculator uses your total weight — rider, bike, and gear — as the primary input, then adjusts for tire width, bike type, and surface. Because weight is the biggest factor, a by-weight calculation is far more accurate than a fixed chart.
Can I use this instead of a brand-specific calculator like Silca, Continental, or Pirelli?
Yes. Tire pressure physics depend on tire width, rim width, and load, not on the tire brand, so this works as a general bicycle tire pressure calculator for Continental, Pirelli, Vittoria, Specialized, Giant, and other brands. Always keep within the min and max psi printed on your specific tire sidewall.