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Bike Tire Pressure Calculator

Bike tire pressure: calculate the ideal pressure (PSI/BAR) based on your weight, tire width and bike type — road, gravel, mountain or city.

Pression recommandée
Avant
58
PSI
4.0 bar
Arrière
67
PSI
4.6 bar

Estimation à titre indicatif. Ajuste selon ton confort, la surface et la météo : baisse de 5-10 % sur route mouillée ou sur gravel meuble. Ne dépasse jamais la pression max inscrite sur le flanc du pneu et de la jante.

How to find the right bike tire pressure

Tire pressure is one of the most overlooked yet most important adjustments in cycling. The right pressure improves comfort, grip and efficiency while reducing the risk of a flat. Overinflated, the tire bounces and loses grip; underinflated, it raises the risk of pinch flats and punctures.

Our calculator estimates the ideal pressure (in PSI and BAR) based on your weight, tire width and bike type — road, gravel, mountain or city. The golden rule: the wider the tire, the lower the pressure can be for the same comfort.

The key principles

  • Total weight matters: a heavier rider needs higher pressure to avoid « bottoming out » on the rim.
  • The rear carries more weight: you generally run 5 to 10% more pressure at the rear than at the front.
  • Tubeless lets you lower the pressure by a few PSI without risking pinch flats, gaining comfort and grip.
  • The surface dictates the setting: drop 5-10% on wet roads, loose gravel or technical trails.

To learn more about maintenance and basic mechanics, check out our bike maintenance chapter.

Frequently asked questions

What pressure for a 28 mm road bike tire?
For a 70-80 kg rider on 28 mm tires, aim for about 65-75 PSI (4.5-5.2 bar). With tubeless, you can drop 5 to 8 PSI for added comfort without risking pinch flats. Adjust for your weight using the calculator above.
How do you convert PSI to BAR?
1 bar = 14.5 PSI. To convert PSI to bar, divide by 14.5 (e.g. 70 PSI ÷ 14.5 ≈ 4.8 bar). Our calculator automatically displays both units.
Should the front and rear have the same pressure?
No. The rear wheel carries about 60% of the weight, so you run 5 to 10% more pressure there than at the front. A slightly softer front tire improves grip and comfort.
Should I check the pressure before every ride?
Ideally yes: a tire naturally loses a few PSI per day (faster with tubeless or latex). A weekly check at minimum prevents nasty surprises and pinch flats.

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