Tool

Bike tyre pressure calculator

Find a good starting pressure for your road, gravel or mountain bike tyres, based on your weight, tyre width and the surface you ride.

Where you ride
Setup
Your starting pressure
Front –psi –
Rear –psi –

This is a starting point. Try it, then adjust in steps of 2 to 3 psi: lower for more grip and comfort, higher if the tyre feels squirmy or you hit the rim. Always stay within the limits printed on your tyre and rim.

Pump to exactly this pressure anywhere: set it on the INFLATA Pro S and it stops automatically.

See the Pro S

How the calculator works

The right pressure depends mostly on how much weight each tyre carries and how wide the tyre is. More weight needs more pressure; a wider tyre spreads the load over a bigger contact patch, so it needs less.

The calculator starts from your total weight (rider plus bike and gear), puts a little more on the rear wheel than the front, scales for tyre width and then adjusts for the surface you ride and whether you run tubeless or inner tubes.

Typical pressure ranges

  • Road, 25 to 32 mm: roughly 50 to 95 psi (3.4 to 6.5 bar)
  • Gravel, 35 to 50 mm: roughly 25 to 55 psi (1.7 to 3.8 bar)
  • MTB, 2.2 to 2.6 in: roughly 17 to 32 psi (1.2 to 2.2 bar)

Heavier riders sit at the top of each range, lighter riders at the bottom.

Tubeless or inner tubes?

Tubeless tyres can run a little lower because there is no tube to pinch against the rim. That gives more grip and comfort with less rolling resistance on rough surfaces. With inner tubes, add a few psi to avoid pinch flats.

Got a puncture on tubeless? Read our guide to repairing a tubeless tyre on the road.

Check before every ride

Tyres slowly lose air, tubeless and latex tubes faster than butyl. A few psi can change how your bike grips and rolls, so check your pressure before every ride, ideally with a digital gauge.

The INFLATA Pro S has a digital pressure display and stops automatically at the pressure you set, for Presta and Schrader valves.