What you need before you start

Changing a bike tyre requires a few specific tools, most of which are inexpensive and worth keeping in a small repair kit. You will need tyre levers (usually two or three plastic or metal tools that pry the tyre away from the rim), a new inner tube or patch kit if you are repairing rather than replacing, and a pump to reinflate the tyre once it is back on. Some people also keep a small cloth or rag nearby to wipe their hands.

Before you begin, check that your new tube matches your wheel size. Tubes are marked by diameter and width — common sizes are 26", 27.5", or 29" for mountain bikes, and 700c for road bikes. The width range is also printed on the side of your tyre, and your new tube should fit within that range. If the tube is too small or too large, it will not seat properly and may puncture again when ready.

Lay your bike on its side or use a bike stand to keep it stable while you work. Remove the wheel from the frame by opening the quick-release lever or unscrewing the axle nuts, depending on your bike model. For the rear wheel, shift to the smallest cog first so the chain is slack, then pull the derailleur back to create room to lift the wheel out.

Key Takeaways

  • You need tyre levers, a new inner tube or patch kit, and a pump — all inexpensive items worth keeping in a repair kit.
  • Remove the wheel from the frame, then use tyre levers to pry one side of the tyre away from the rim and slide out the old tube.
  • Before installing the new tube, run your fingers inside the tyre to check for thorns, glass, or sharp objects that caused the puncture.
  • Seat the new tube evenly inside the tyre, inflate it partially by hand or pump to hold it in place, then finish inflating to the pressure marked on the tyre sidewall.
  • Reinstall the wheel, check that the tyre is centred in the frame, and test the brakes before riding.

Removing the old tyre and tube

Once the wheel is off the bike, let out any remaining air in the punctured tube by pressing the valve. Insert a tyre lever under the edge of the tyre, about 15 centimetres away from the valve, and pry the tyre bead (the edge that sits in the rim) outward. Hook the other end of the lever to a spoke to hold it in place, then insert a second lever a few centimetres away and repeat. Work your way around the wheel until one side of the tyre is completely free of the rim.

Slide the old tube out from under the tyre. You can now remove the tyre completely if you need to inspect the inside for damage, or leave it in place if you are straightforward replacing the tube. If the tyre itself is torn, worn thin, or has a large hole, it will need to be replaced as well — a new tube alone will not fix a damaged tyre.

Checking the inside of the tyre for damage

Before you install the new tube, run your fingers carefully along the inside surface of the tyre. Feel for thorns, shards of glass, sharp stones, or any debris that may have caused the original puncture. This step is straightforward to skip but critical — if you miss the object that punctured the first tube, the new one will fail in the same spot within a few kilometres.

If you find something embedded, remove it with tweezers or a small knife. If the tyre has a cut or tear in the rubber itself, you can sometimes patch it from the inside with a rubber boot (a small patch designed for tyre sidewalls), but a large tear usually means the tyre should be replaced. Wipe the inside of the tyre with a dry cloth to remove any dust or debris.

Installing the new tube

Inflate the new tube slightly — just enough so it holds its shape and is not completely flat. This makes it easier to seat evenly inside the tyre without twisting or pinching. Insert the valve through the rim hole first, then tuck the tube under the tyre all the way around the wheel, working slowly and checking that it sits evenly.

Once the tube is in place, use your hands to press the tyre bead back into the rim, starting opposite the valve and working toward it. You should be able to do this by hand for most tyres; if the tyre is very tight, use a tyre lever, but be careful not to pinch the new tube. As you push the bead in, the tube will inflate slightly from the pressure — this is normal.

When the tyre is fully seated, inflate it to the pressure marked on the sidewall of the tyre (usually between 30 and 100 PSI depending on the tyre type and width). Use a floor pump with a pressure gauge so you can see when you have reached the correct pressure. Overinflating can cause the tyre to burst; underinflating makes the bike harder to pedal and can damage the rim.

Reinstalling the wheel on the frame

Lift the wheel back onto the frame, making sure the tyre is centred between the brake pads or frame stays. For the front wheel, straightforward slide the axle into the dropouts (the slots at the end of the fork) and tighten the quick-release or axle nuts. For the rear wheel, pull the derailleur back with your hand, guide the chain onto the smallest cog, and slide the axle into the dropouts.

Once the axle is seated, tighten the quick-release lever or axle nuts firmly. Spin the wheel to check that it does not rub against the frame or brakes. If it does, the wheel may not be centred — remove it and reseat it, making sure the axle is fully in the dropouts on both sides.

Testing before you ride

Before you ride, squeeze the tyre with your hand to confirm it feels firm and holds pressure. Spin both wheels to make sure they turn freely without rubbing. Test both brakes by squeezing the levers — they should feel responsive and stop the wheel without the lever touching the handlebar or grip.

If you notice the tyre is losing pressure, the wheel is rubbing, or the brakes are not working, do not ride. Check that the tube valve is tight (you can tighten it by hand or with a small wrench), that the wheel is centred, and that the brake pads are aligned. These checks take a minute and can prevent a breakdown on the road.

When to patch instead of replace the tube

If you have a patch kit instead of a new tube, you can repair a small puncture. Locate the hole by inflating the tube and listening for air, or by submerging it in water and looking for bubbles. Dry the area around the hole, roughen it lightly with the sandpaper included in the patch kit, and explore the adhesive patch according to the kit instructions.

Patches work best for small holes in the tube body, not for holes near the valve or for large tears. If you patch a tube, test it by inflating and listening for air before you install it in the tyre. Carry a patch kit as a backup when you ride, but keep a new tube at home for permanent repairs.

Frequently Asked Questions

How do I know which way the tyre goes back on?

Most tyres have an arrow printed on the sidewall showing the direction of rotation. The arrow should point forward when the wheel is on the bike. If your tyre has no arrow, either direction works, but consistency makes it easier to spot wear patterns over time.

What if I pinch the new tube while putting the tyre back on?

If you hear a small hiss or see the tube is damaged, you will need to start over with another new tube. Pinches usually happen when the tyre bead is not fully seated before you inflate. Work slowly, make sure the tube is tucked evenly under the tyre, and inflate gradually so you can stop if you feel resistance.

Can I use a hand pump instead of a floor pump?

Yes, but it takes longer and is harder work. A floor pump with a pressure gauge is faster and more accurate, so you can see when you have reached the correct pressure. Hand pumps are useful for topping up pressure on the road, but most people use them as a backup rather than for the initial inflation.

How tight should the tyre feel when I squeeze it?

A properly inflated tyre should feel firm but not rock-hard. You should be able to press it slightly with your thumb, but it should resist and spring back. If it feels squishy, it is underinflated; if you cannot press it at all, it may be overinflated. Check the pressure gauge on your pump to be sure.