Inflate your tyre by matching the valve type to your pump, then adding air until the pressure matches the sidewall marking

Bicycle tyres lose air over time — it is normal. Before you ride, check the pressure and top up if needed. The process takes five minutes and requires only a pump and a pressure gauge (many pumps have one built in). You will need to know which valve your bike has, because the pump attachment differs, and you will need to read the correct pressure range printed on the tyre sidewall itself.

The two common valve types are Schrader (looks like a car tyre valve, wider and shorter) and Presta (looks like a thin pen cap, taller and narrower). Some bikes have Dunlop valves, which are less common but work similarly to Schrader. Using the wrong pump head will not seal properly and you will waste effort. Check your valve before you buy or borrow a pump.

Key Takeaways

  • Check the pressure range printed on your tyre sidewall — it will say something like "80–130 psi" — and inflate to somewhere in that range.
  • Schrader valves (car-style, wider) need a different pump head than Presta valves (thin, pen-cap style), so match the valve type first.
  • Presta valves have a small lock nut at the top that you must unscrew before pumping, then screw back down when done.
  • A hand pump works for emergency top-ups; a floor pump with a gauge is faster and more accurate for regular maintenance.
  • Over-inflating damages the tyre and makes the ride harsh; under-inflating causes pinch flats and wears the tyre edges.

Identify your valve type before you start

Look at the valve sticking out of your wheel rim. If it is wide and stubby like a car tyre valve, you have a Schrader valve. If it is thin and tall with a small metal cap on top, you have a Presta valve. Dunlop valves look similar to Schrader but are slightly narrower; they are common on older bikes and some utility bikes.

This matters because pump heads are not universal. A Schrader pump head will not seal on a Presta valve, and vice versa. Many floor pumps have a reversible head or two separate heads — check yours before you start. If you have a hand pump, it will be marked for one type or the other. Using the wrong head wastes time and frustration.

Prepare a Presta valve by unlocking the top

If you have a Presta valve, you must unlock it before air can enter. At the very top of the valve is a small metal lock nut. Unscrew it by turning it counterclockwise — it only needs to turn a quarter turn or so. You will feel it loosen. Do not remove it completely; just loosen it enough that it spins freely.

Some people press the valve tip gently to hear a small hiss of air escaping — this confirms the valve is unlocked and ready. You do not need to do this, but it is a quick check. Once you have finished pumping, screw the lock nut back down clockwise until it is snug. This prevents dirt and moisture from entering the valve.

Attach the pump head and seal it firmly

Push the pump head onto the valve with a straight, firm motion. For a floor pump, you will usually see a lever on the side of the head — flip it down or up (depending on the pump design) to lock the head in place. For a hand pump, push it on and hold it steady. A good seal is essential; if air is leaking around the connection, you will pump without building pressure.

Listen and feel for leaks. If you hear air hissing around the pump head, pull it off and try again. The connection should feel tight and airtight. On a floor pump with a lever, the lever should click or snap into place. Once sealed, you are ready to pump.

Pump air in and watch the gauge

Begin pumping steadily. On a floor pump, use your full body weight — push down and pull up in a smooth rhythm. On a hand pump, use both hands and pump in and out. Watch the gauge as the pressure rises. The gauge is usually on the pump barrel or on a separate dial attached to the hose.

Stop when the needle reaches the pressure range printed on your tyre sidewall. This range is usually marked as two numbers — for example, "80–130 psi" or "5.5–9 bar". You can inflate anywhere within that range; most riders aim for the middle or slightly higher for a firmer ride. Do not exceed the maximum number on the sidewall — over-inflation can burst the tyre or cause it to unseat from the rim.

Remove the pump and lock the valve

Once you reach the target pressure, pull the pump head straight off the valve. Do this firmly and in one motion; a slow or angled removal can let air escape. You may hear a small hiss as the head comes off — this is normal.

If you have a Presta valve, screw the lock nut back down clockwise until it is snug. Do not over-tighten it; snug is enough. For Schrader and Dunlop valves, there is no lock nut, so you are done. Check the pressure one more time by squeezing the tyre with your hand — it should feel firm but not rock-hard. If it feels soft, pump again.

Choose between a hand pump and a floor pump

A hand pump is portable and fits in a backpack or under a seat. It is useful for emergency top-ups on the road. Hand pumps are slower and require more effort, especially for high-pressure road tyres. They are adequate for casual riders and mountain bikes, which run at lower pressures.

A floor pump sits on the ground and uses your body weight, making it faster and less tiring. It usually has a built-in gauge, so you can see the pressure without guessing. Floor pumps are the standard for home maintenance and are worth the space if you ride regularly. They cost between £20 and £60 depending on the gauge accuracy and build quality.

Many riders keep a floor pump at home and carry a hand pump or a small cartridge pump (which uses compressed CO₂ canisters) for emergencies. A cartridge pump inflates a tyre in seconds but the canisters are single-use and add up in cost.

Frequently Asked Questions

How often should I check my tyre pressure?

Check before every ride, or at least once a week if you ride regularly. Tyres lose air naturally over time, even without a puncture. Road tyres lose pressure faster than mountain bike tyres because they run at higher pressure. A quick squeeze with your hand tells you if the tyre feels soft; use the gauge to confirm the exact pressure.

What pressure should I use if the range is wide?

If the sidewall says "80–130 psi", you can inflate anywhere in that range. Higher pressure (toward 130) gives a faster, firmer ride but a harsher feel on bumps. Lower pressure (toward 80) gives more grip and comfort but is slower and uses more energy. Most riders start in the middle and adjust based on how the bike feels.

Can I use a car pump on my bicycle?

Only if your bike has a Schrader valve. Car pumps are designed for Schrader valves and will not work on Presta valves. Even with a Schrader valve, a car pump may be too powerful and inflate the tyre too quickly, making it hard to control the final pressure. A bicycle pump is safer and more precise.

What does it mean if my tyre keeps losing pressure?

A slow leak over days or weeks is normal — all tyres lose air gradually. A fast leak (losing pressure in hours) suggests a puncture or a faulty valve. Check the tyre for thorns, glass, or cuts. If you find nothing, the problem is likely the valve itself. A bike shop can replace a valve or patch a puncture for a small fee.

Is it bad to over-inflate a tyre?

Yes. Over-inflation makes the tyre hard and bouncy, reduces grip, and can damage the tyre structure or cause it to unseat from the rim. In extreme cases, an over-inflated tyre can burst. Always stop at or below the maximum pressure printed on the sidewall. If you accidentally over-inflate, let air out by pressing the valve tip until the pressure drops to the correct range.