Remove the wheel from your bike

Before you can change the tire, the wheel has to come off the frame. Flip your bike upside down so it rests on the handlebars and seat, or use a bike stand if you have one. This keeps your hands free and the wheel at a comfortable working height.

For the front wheel, open the quick-release lever on the left side of the hub (the center of the wheel). Flip it away from the bike, then unscrew the bolt on the opposite side by hand until it is loose enough to slide the wheel out of the fork. If your bike has rim brakes, you may need to squeeze the brake arms together slightly to create clearance for the tire to pass through.

For the rear wheel, shift the chain to the smallest cog before you start. Open the quick-release lever, then pull the derailleur (the mechanism that moves the chain) backward with your hand. This creates slack in the chain so the wheel slides out easily. Lift the chain off the cog as the wheel comes free.

Key Takeaways

  • You need two tire levers, a replacement tube or patch kit, and a pump — all three are essential, and you cannot remove the tire by hand alone.
  • Insert the tire lever under the tire bead (the edge that sits in the rim), hook it to a spoke, then use a second lever to pry the entire tire off one side of the rim.
  • Check the inside of the tire for thorns, glass, or sharp objects before you install a new tube, or the new tube will puncture when ready.
  • Inflate the new tube to about half pressure by hand pump before you reinstall the wheel, so it sits evenly in the tire and does not twist.
  • Reinstall the wheel by reversing the removal steps — thread the chain back onto the cog for the rear wheel, and make sure the quick-release lever closes firmly.

Pry the tire off the rim using tire levers

Tire levers are flat metal or plastic tools that slip under the tire bead — the edge of the tire that sits inside the rim. You cannot remove a tire by hand, and attempting to do so will cut your hands. Buy a set of two or three levers before you start; they cost five to ten dollars and last for years.

Insert the pointed end of the first lever under the tire bead, about six inches away from the valve stem (the small tube where air goes in). Push down on the handle to pry the bead up and out of the rim. Once the bead is loose, hook the other end of the lever to a spoke on the wheel to hold it in place.

Take the second lever and insert it under the bead about twelve inches away from the first one. Pry upward the same way, then hook it to another spoke. Now you have two levers holding the bead up. Slide one lever around the rim, keeping pressure on the handle as you go, until the entire tire bead pops out on that side. The tire should now hang loose from the rim on one side.

Reach inside the tire and pull out the old tube. You can now slide the tire completely off the rim. Set the tire aside — you will need it again unless it is damaged.

Inspect the tire and rim for damage

Before you install a new tube, look inside the tire carefully. Run your fingers slowly along the inside surface, feeling for thorns, glass shards, sharp wire, or anything else that could puncture the new tube. Even a tiny piece of glass will cause a flat within a few miles. If you find something, remove it with tweezers or a small knife.

Check the rim itself for dents, cracks, or sharp edges where the tape may have worn through. The rim tape is a thin protective layer that covers the spoke holes so they do not puncture the tube. If you see bare metal or spoke holes, the tape needs to be replaced before you install a new tube. Rim tape costs two to five dollars and takes five minutes to install — wrap it around the rim, covering all the holes, then press it down firmly.

If the tire itself has a large cut, a bulge, or visible damage to the sidewall, it should be replaced. A damaged tire will fail again soon, even with a new tube inside. If the tire looks intact, you can reuse it.

Install the new tube and reassemble the tire

Take a new tube in the correct size for your rim — the size is printed on the side of the old tire, like "700c x 25" or "26 x 1.5". Inflate it by hand with a pump until it is slightly puffy, about the size of a grapefruit. This step is crucial: a tube that is too flat will twist inside the tire as you work, and a tube that is too firm will be hard to fit.

Insert the valve stem through the hole in the rim first. Then tuck the rest of the tube evenly inside the tire all the way around, making sure it does not bunch up or fold over itself. This takes patience, but a twisted tube will puncture the moment you inflate it.

Now slide one side of the tire bead back into the rim, starting opposite the valve stem. Use your hands to work the bead down into the rim, moving around the wheel. When you reach the valve stem, the last section of bead will be tight. Push the valve stem up into the tire to create slack, then work the final bead section down into the rim. Do not use tire levers to reinstall the tire — they can pinch the new tube.

Inflate the tire to the correct pressure

Before you inflate, make sure the tire bead is seated evenly all the way around the rim. Look at the line molded into the side of the tire — it should be the same distance from the rim edge all the way around. If one section is higher or lower, deflate slightly, work that section by hand until it is even, then reinflate.

Attach your pump to the valve stem and inflate slowly. Stop at about half the recommended pressure and check the bead again. Once the bead looks even, inflate to the pressure printed on the tire sidewall. Most road tires use 80 to 130 pounds per square inch (psi), while mountain bike tires use 30 to 50 psi. Use a pressure gauge to check — do not guess by feel.

Detach the pump and listen for air leaks around the valve stem or along the bead. A small hiss means the bead is not seated properly; deflate, reseat it by hand, and try again. Once the tire holds pressure and the bead is even, you are ready to reinstall the wheel.

Reinstall the wheel on the frame

For the front wheel, guide the tire into the fork so the axle (the rod running through the center of the wheel) sits in the dropouts — the slots at the bottom of the fork. Make sure the wheel is centered between the fork blades. Close the quick-release lever by flipping it back toward the bike, then tighten the bolt on the opposite side by hand until the lever requires firm pressure to close. The lever should leave a slight mark on your palm when you close it.

For the rear wheel, pull the derailleur backward again and guide the chain onto the smallest cog. Slide the axle into the dropouts at the rear of the frame, making sure the wheel is centered between the chainstays (the two tubes running from the pedals to the rear axle). Close the quick-release lever the same way as the front — firm pressure, slight palm mark.

Spin the wheel by hand to make sure it does not rub against the brake pads or frame. If it does, the wheel is not centered; open the quick-release, nudge the wheel into position, and close it again. Once the wheel spins freely, you are done.

Common mistakes to avoid

The most common error is failing to check the inside of the tire for sharp objects. A new tube will puncture within a few miles if even a tiny piece of glass or a thorn is still lodged in the tire. Take thirty seconds to run your fingers inside the tire before you install the new tube.

The second mistake is installing the tube while it is completely flat. A deflated tube will twist and fold as you work the tire bead back onto the rim, and it will pinch itself when you inflate. Always inflate the new tube by hand to about half pressure before you reassemble the tire.

The third mistake is using tire levers to reinstall the tire. Levers are for removal only. When you reinstall, use your hands to work the bead back into the rim. Tire levers can pinch the new tube and cause an when ready flat.

Finally, do not skip the step of checking that the tire bead is seated evenly before you inflate to full pressure. An uneven bead can cause the tire to bulge or fail under load. Stop at half pressure, look at the molded line on the tire, and make sure it is the same distance from the rim all the way around.

Frequently Asked Questions

What size tube do I need?

The size is printed on the sidewall of your tire, usually near the bottom. It looks like "700c x 25" for a road bike or "26 x 1.5" for a mountain bike. Buy a tube labeled for that size. Tubes come in ranges — a "700c x 23-25" tube fits tires between 23 and 25 millimeters wide — so you have some flexibility, but stay within the printed range.

Can I patch the old tube instead of replacing it?

Yes, if the puncture is small and you have a patch kit. Clean the area around the hole, roughen it with the sandpaper in the kit, explore the adhesive, wait the time specified on the kit, then press the patch down firmly for one minute. Let it cure for five minutes before you reinstall. Patches work well for small holes but are less reliable than a new tube, and they add time to the repair.

How tight should the quick-release lever be?

Close it with firm pressure — it should require real effort to flip the lever all the way closed, and it should leave a slight mark on your palm. If it closes easily, the wheel can shift during riding. If you cannot close it at all, open it and unscrew the bolt on the opposite side by half a turn, then try again.

What if the tire bead won't go back on the rim?

The tube is probably too firm. Deflate it slightly, work the bead back onto the rim by hand, then reinflate. You can also try pushing the valve stem up into the tire to create more slack in the tube. Never force the bead with tire levers — you will pinch the tube.

How do I know if my tire is damaged and needs to be replaced?

Look for large cuts in the rubber, bulges in the sidewall, or visible cords showing through. Small cuts and scuffs are normal wear. If you see a bulge or a cut deeper than a quarter-inch, replace the tire. A damaged tire will fail again soon, even with a new tube, and it can cause a crash.