What pressure should you inflate your bike tyres to?

Updated on 5 November 2026. Recommended products are available at the time of the update.

Bike tyres should be inflated to a pressure suited to the combined weight of the rider, bike and luggage, the tyre width, the surface and whether you use inner tubes or tubeless. Start with the tyre and rim manufacturers' guidance, measure with a pressure gauge and adjust gradually: the maximum value on the sidewall is a limit, not the pressure to use every time.

How to choose

Before looking for a number, gather four pieces of information. Even two apparently similar bikes may need different pressures.

• Total weight: include the rider in their kit, the bike, water bottles and luggage. With the same tyre, a heavier load generally requires more pressure.
• Tyre width: a wider tyre can normally run at lower pressures. The actual width also depends on the rim and may differ from the width shown on the sidewall.
• Surface: smooth tarmac, unpaved tracks and trails require different compromises between support, grip and impact protection.
• Setup: with an inner tube, you need to prevent it from being pinched against the rim; with tubeless, you still need to prevent rim strikes, instability and air loss at the bead.

If the manufacturer provides a calculator or chart, enter these details and use the result as a starting point, always within the permitted limits. To compare units, 1 bar is approximately 14.5 psi.

How many bar should you start with?

These ranges are rough examples for a total weight of approximately 85 kg, with no unusual loads. They do not replace the guidance for your tyre and rim combination: if they fall outside the permitted limits, do not use them.

• Road bike, 28 mm tyres: approximately 4.5-6 bar on tarmac.
• City or trekking bike, 40-50 mm tyres with inner tubes: approximately 2.5-4 bar on mostly tarmac routes.
• Gravel bike, 40-45 mm tubeless tyres: approximately 1.8-2.8 bar on mixed surfaces.
• MTB, 2.3-2.4 inch tubeless tyres: approximately 1.3-1.9 bar, adjusted to suit the terrain, casing and riding style.

With more weight, you generally need to increase the pressure; with less weight, you can often reduce it. However, do not apply a fixed adjustment to every tyre: width, casing and load distribution affect the result.

The rear wheel often carries more weight and may need a slightly higher pressure than the front. Bags and child seats can significantly change this distribution.

Tarmac, unpaved surfaces and inner tubes or tubeless

An overinflated tyre can transmit more vibration and lose grip on uneven ground. An underinflated tyre can deform when cornering and allow the rim to strike the ground.

• On smooth tarmac: aim for support and low rolling resistance, without automatically inflating to the maximum.
• On damaged tarmac and unpaved surfaces: a small reduction can improve comfort and contact with the ground, provided you stay within the permitted limits.
• With inner tubes: insufficient pressure increases the risk of a pinch puncture when the tyre compresses against an obstacle.
• With tubeless: you can often use lower pressures than with inner tubes, but there is no fixed reduction. Rim strikes and air loss at the bead are still possible.

To better understand the relationship between tyres and routes, read Gravel bikes: how to choose the right one and Mountain bikes: how to choose between hardtail and full suspension.

Tyre and rim limits, including hookless

Check the guidance on the tyre sidewall and in the rim documentation. You must observe all applicable limits: the lower maximum pressure applies, while any minimum pressures must also be respected.

• Check the combination: the tyre size, internal rim width and setup must be compatible.
• With hookless rims: use only tyres and sizes expressly approved for that system. The word “tubeless” alone does not confirm compatibility.
• Check the specific limit: on hookless systems, the maximum pressure may also depend on tyre width. Do not apply another wheel's value to yours.
• During fitting too: do not exceed the permitted limit to seat the bead.

If the pressure needed to support the load exceeds the permitted maximum, you need to reconsider your choice of tyre or wheel. Exceeding the limit does not solve the problem.

How to use a pressure gauge

Check the pressure before your ride, with the tyres at ambient temperature and preferably always using the same gauge. Pressing the tyre with your thumb does not give a reliable measurement.

• Prepare the valve: remove the cap and, if it is a Presta valve, unscrew the small nut at the tip. For Schrader valves, attach the compatible head.
• Select bar or psi: use the same unit as the guidance you are following.
• Attach the head: keep it properly aligned, following the gauge instructions. Air loss during connection can change the pressure, especially in low-volume tyres.
• Read and adjust: add air with the pump or release a little at a time, then measure again.
• Close the valve: on Presta valves, screw the small nut back down without forcing it and replace the cap.

To fine-tune the pressure, ride a familiar route and adjust one tyre at a time, for example by 0.1-0.2 bar. If the tyre folds in a corner or the rim strikes an obstacle, stop and check the pressure and for any damage before continuing.

When choosing between pressure gauges, check valve compatibility, measuring range and readability at the pressures you use. A high maximum reading alone does not guarantee accurate readings at low pressures.

Our recommendations, available now

Topeak SmartGauge D2 Digital Pressure Gauge for Presta and Schrader Valves

Suitable for anyone who wants to check bikes with Presta and Schrader valves using a rotating head, without changing parts. It shows the pressure on an electronic display in psi, bar or kg/cm², measures up to 17 bar and includes a CR2032 battery.

Topeak SmartGauge D2X Digital Pressure Gauge with SmartHead 18 Connector bar/260psi

Suitable for anyone looking for a tool for tyres as well as compatible air forks and shocks. It works with Presta and Schrader valves, measures approximately 0.35-18 bar and lets you choose between bar, PSI and kg/cm² at the press of a button.

XON Portable Tyre Pressure Gauge for Presta and Schrader Valves Black

Suitable for anyone who wants to check tyre pressure away from home with a portable tool. It is compatible with Presta and Schrader valves, so it can be used on bikes with either valve type.

Lezyne 2,5-inch 350 psi Replacement Pressure Gauge

A replacement for a broken or unreadable pressure gauge on a floor pump with a 2,5-inch gauge. It has a maximum pressure of 350 psi, equivalent to 24.1 bar, and includes adhesive and an O-ring for fitting: measure the diameter before buying.

Lezyne Digital Pressure ABS Pen Pressure Gauge

A replacement flexible hose with an integrated pressure gauge for Lezyne pumps in sizes M and L, which can be stored in the pump handle. The ABS flip-thread head is compatible with Presta and Schrader valves and the maximum limit is 8.3 bar: check your pump size before choosing it.

The maximum pressure the gauge can measure is not the pressure you should use in your tyres. For shipping information, see our shipping policy.

Let's find the right pressure for your bike

Evolution Bikes is a family-run shop in Casapulla, in the province of Caserta, established in 1974 and now in its third generation, with a workshop, bike fitting and e-bike servicing. Bring your bike into the shop to have the pressure checked and adjusted, or ask us for advice, providing your total weight, tyres, rims and usual routes.

Frequently asked questions

How many bar should I inflate my bike tyres to?

It depends on total weight, tyre width, terrain and whether you use inner tubes or a tubeless setup. Start with the tyre and rim manufacturers' recommendations, then fine-tune the pressure using a pressure gauge without exceeding the permitted limits.

Should I inflate my tyres to the maximum pressure shown on the sidewall?

No, the maximum is a limit, not the recommended pressure for every use. Check the rim's limit too: if it is lower, you must respect that limit.

Can I use lower pressure with tubeless tyres?

Often yes, compared with a setup using inner tubes, but there is no universal reduction. Pressure that is too low can cause instability, rim strikes or air loss at the bead.

How often should I check my tyre pressure?

Check it before every ride, especially with road or tubeless tyres, and before setting off with luggage. Measure at ambient temperature: pressing the tyre with your thumb is no substitute for a pressure gauge.