Choose the Right Pump for Your Valve Type

Before you inflate, you need a pump that fits your valve. Bicycle tyres use one of three valve types: Schrader (the fat one, like a car tyre), Presta (the thin one with a small metal cap), or Dunlop (common on older bikes and some city bikes). Most pumps work with Schrader and Presta, but check the pump head before you buy — the packaging or product listing will say "universal" or list which valves it fits.

Floor pumps (the tall ones that stand on the ground) are fastest for home use and give you leverage to reach high pressure. Hand pumps are portable but take more effort. CO2 cartridges inflate a tyre in seconds but cost money per use and work best as a roadside backup, not your main pump at home.

Key Takeaways

  • Match your pump to your valve type — Schrader, Presta, or Dunlop — or buy a universal pump that fits all three.
  • Check the pressure range your tyre needs, printed on the sidewall, and inflate to that range rather than guessing.
  • For Presta valves, unscrew the small metal cap and open the valve by turning the top counterclockwise before attaching the pump.
  • Attach the pump head firmly, pump until the gauge reads your target pressure, then remove the pump and close the valve when ready.
  • Check your tyre pressure once a month because all tyres lose air slowly, even when not in use.

Find the Correct Pressure for Your Tyre

The sidewall of your tyre prints the pressure range in PSI (pounds per square inch) or bar. Road bike tyres typically need 80–130 PSI. Mountain bike tyres typically need 30–50 PSI. Hybrid and city bike tyres typically need 50–70 PSI. Do not guess — read what your tyre says.

Within that range, higher pressure rolls faster on smooth surfaces but feels harsher. Lower pressure (toward the bottom of the range) gives more grip and comfort on rough ground. Most riders inflate to the middle or upper part of the range for everyday riding. Write down your target pressure or take a photo of the sidewall so you have it when you pump.

Prepare a Presta Valve Before Pumping

If your bike has Presta valves (the thin ones), you must open the valve before the pump will work. Unscrew the small metal cap at the very top and set it somewhere you will not lose it. Then turn the tiny metal post at the top counterclockwise — it will loosen and stop after a quarter turn. You will hear or feel a small click. Do not force it; a quarter turn is enough.

Schrader valves (the fat ones) do not need this step — they open automatically when the pump head presses on them. Dunlop valves may have a small cap but no post to open; remove the cap and proceed to attach the pump.

Attach the Pump and Inflate to Pressure

Push the pump head onto the valve firmly and twist or lever it to lock it in place — the exact motion depends on your pump model, but it should feel snug and not wobble. If it is loose, air will leak out around the sides and you will waste effort.

Begin pumping. Watch the gauge on the pump as you go. Stop when the needle reaches your target pressure. Do not overshoot — overinflated tyres wear faster and can burst. Once you reach the right pressure, remove the pump head by twisting or unlevering it (the reverse of how you attached it). For Presta valves, when ready turn the metal post clockwise to close the valve, then screw the cap back on. For Schrader valves, the valve closes on its own.

Check Pressure Monthly and Before Long Rides

All tyres lose air over time, even when the bike sits in a garage. Check your pressure once a month with a separate gauge (many floor pumps have a built-in gauge, or you can buy a small hand gauge for a few pounds). If the pressure has dropped more than 5–10 PSI, top it up.

Before a long ride or a ride on rough ground, always check pressure. A tyre that feels soft to the touch is usually underinflated and will slow you down and make the ride harder. A tyre that feels rock-hard may be overinflated and will bounce instead of grip.

Troubleshoot Common Inflation Problems

If the pump head will not stay on the valve, the connection is not tight enough. Remove it, check that the valve is straight and not bent, and push the pump head on again with more force. If air hisses out around the pump head, the seal is broken — remove the pump, check the rubber washer inside the pump head for damage, and try again.

If the tyre will not hold pressure after you inflate it, the valve may be faulty or the tyre may have a puncture. Deflate the tyre and listen for a hiss near the valve. If you hear one, the valve seal is damaged and the inner tube or tyre will need to be replaced. If you hear nothing at the valve but the tyre still goes flat, the puncture is elsewhere in the tyre — check for thorns, glass, or a hole.

Hand Pump and CO2 Cartridge Basics

Hand pumps work the same way as floor pumps but require more strokes and give less leverage. Attach the head to the valve the same way, then push and pull the handle repeatedly until you reach pressure. Hand pumps are slower but useful for roadside repairs or if you have no power outlet.

CO2 cartridges screw into a special head that attaches to your valve. One cartridge usually fills a road bike tyre or a small mountain bike tyre to full pressure in one or two seconds. They are light and fast but cost money per use (typically 50p to £1 per cartridge) and do not let you control pressure — the tyre inflates until the cartridge runs out. Use them for emergencies, not routine inflation.

Frequently Asked Questions

What pressure should I use if my tyre has a range like 50–70 PSI?

Start at 60 PSI (the middle of the range) for everyday riding. If the tyre feels too soft or bouncy, add 5 PSI. If it feels too hard or the ride is rough, reduce by 5 PSI. You will find your preference within a few rides.

Can I use a car tyre pump on my bicycle?

Only if your bike has a Schrader valve (the fat one). Car pumps are designed for Schrader valves and will not fit Presta or Dunlop valves. If you have a Presta valve, buy a bicycle pump or a universal pump that lists Presta compatibility.

How do I know if my tyre is overinflated?

The tyre will feel rock-hard when you press it with your thumb, and the bike will bounce instead of absorbing bumps smoothly. Check the gauge — if it reads above the maximum pressure printed on the sidewall, deflate by pressing the valve until air escapes, then re-check with the gauge.

Why does my tyre lose pressure even when I do not ride?

All tyres lose air slowly through the rubber and the valve seal. Losing 5–10 PSI per month is normal. If you lose more than that, the valve may be faulty or the tyre may have a slow puncture. Check the valve for hissing and the tyre for thorns or glass.

Do I need to deflate my tyre before storing the bike for winter?

No. Deflating does not help and makes the tyre harder to re-inflate. Instead, inflate to the correct pressure and check it every month. If you store the bike for more than three months, check pressure before you ride again.