Not sure how much air to put in your bike tires? Use our free tire pressure calculator to instantly find the right PSI for your road, MTB, or gravel bike.
Get recommended front and rear tire pressures based on your setup. Enter rider and bike+gear weights, tire width (mm or inches), wheel diameter, terrain and style — then press Calculate.
How we calculate
- Road baseline (tube): 28 mm @ ~75–80 kg → ~78–82 psi rear; tubeless −6; rough −5; wet −3.
- Gravel baseline (tubeless): 40 mm @ 80 kg → ~32–38 psi rear; loose −5; chunky −8; tubes +2.
- MTB baseline (tubeless): 58 mm (~2.3") @ 80 kg → ~20–26 psi rear; rocky −4; loose −6; bike-park +2; tubes +2.
- Wheel diameter: 27.5" ≈ +2 psi (gravel/MTB), 26" ≈ +4 psi.
- Front ≈ 90–94% of adjusted rear; bar = psi × 0.0689476.
These are starting points—always respect rim/tire ratings and fine-tune for feel and terrain.
Keep your tires at the right PSI for a smoother ride, fewer flats, and better control—check your pressure before every adventure.
Disclaimer (please read):
This tire pressure calculator is based on published research, industry guidelines, and practical heuristics—not on real-time field testing. Use the result as a starting range, then fine-tune by small increments (±2–5 PSI) based on your tire’s sidewall limits, terrain, weather/temperature, rider comfort, and tubeless vs. tubed setup.
Always consult your tire and rim manufacturer’s recommendations and consider advice from a trusted local bike shop.
For deeper understanding, we encourage additional reading and periodic re-checks as your riding conditions change.
Our goal is to help you ride safer and smoother—you’re still in control of the final PSI.
Why Use This Calculator
Getting tire pressure right is a constant pain point for riders. Overinflated tires feel harsh and risky, while underinflated ones make pedaling harder and increase pinch flats.
This tire pressure calculator helps you dial in the best PSI range for road, mountain, and gravel bikes by considering your tire size and rider weight. The right pressure means:
- Road bikes: Faster speeds with balanced comfort.
- MTB tires: Better traction and shock absorption on trails.
- Gravel tires: Stability and grip on mixed terrain without sacrificing efficiency.
How It Works
The calculator is simple and beginner-friendly:
- Choose your bike type (road, MTB, or gravel).
- Enter your tire size.
- Input your rider weight.
- Get an instant PSI recommendation customized for your setup.
It uses research-backed cycling guidelines, balancing rolling resistance, comfort, and puncture prevention.
Examples
- A 70 kg road cyclist with 700 x 25 tires may get a PSI range of 90–100.
- An 80 kg mountain biker with 29 x 2.3 tires may see 28–35 PSI.
- A 65 kg gravel rider with 700 x 40 tires may get 35–45 PSI.
Tip: Always cross-check with your tire’s sidewall markings for maximum PSI, then fine-tune for terrain and comfort.
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Frequently Asked Questions
What PSI should road bike tires be?
Most road bikes run between 80–120 PSI, depending on rider weight and tire width. Narrower tires need higher PSI.
What PSI should mountain bike tires be?
Typical MTB tires range from 25–40 PSI. Lower pressure improves traction on trails, but too low risks pinch flats.
What PSI should gravel bike tires be?
Gravel tires usually fall between 30–50 PSI, offering a balance of grip and rolling efficiency.
How often should I check my tire pressure?
Check before every ride. Road tires lose air faster than MTB and gravel, so frequent checks keep you safe.
References
Fiolo, N. J., Lu, H.-Y., Chen, C.-H., Fuchs, P. X., Chen, W.-H., & Shiang, T.-Y. (2021). The Validity and Reliability of a Tire Pressure-Based Power Meter for Indoor Cycling. Sensors, 21(18), 6117. https://doi.org/10.3390/s21186117
Macdermid, P. W., Miller, M. C., Macdermid, F. M., & Fink, P. W. (2015). Tyre volume and pressure effects on impact attenuation during mountain bike riding. Journal of Sports Science & Medicine, 14(4), 848-855. https://pdfs.semanticscholar.org/c188/88106948ae9c4609650c773841ba20e0faf0.pdf
The evolution of bicycle tire pressure: From max pressure to smooth and fast. (2025, August 7). Wildrock. https://wildrock.net/blogs/the-journal/the-evolution-of-bicycle-tire-pressure-from-max-pressure-to-smooth-and-fast