What you need before you start
Changing a bike tire requires a few specific tools, most of which are inexpensive and worth keeping in a small repair kit. You will need two tire levers (plastic or metal tools that pry the tire bead away from the rim), a new inner tube or a patch kit if you are repairing rather than replacing, and a pump. Some riders also keep a spare tire in addition to a spare tube, though a tube replacement handles most flats.
Before you begin, identify what type of valve your bike uses. Most modern bikes have either a Presta valve (narrow, with a small locking nut at the top) or a Schrader valve (wider, like a car tire valve). The valve type determines which pump head you use and whether you need an adapter. Check your current tire and pump to confirm they match.
Lay your bike on its side or use a bike stand to keep it stable while you work. Remove any fenders or brake components that might block access to the wheel. If you are changing the rear tire, shift to the smallest chainring first — this gives you slack in the chain and makes wheel removal easier.
Key Takeaways
- You need tire levers, a new tube or patch kit, and a pump that matches your valve type before you start.
- Deflate the tire completely, then use tire levers to pry one side of the tire bead off the rim, working around the wheel.
- Remove the old tube, inspect the tire interior for thorns or debris, then install the new tube and reseat the tire bead by hand before using the pump.
- Inflate slowly and check that the tire bead sits evenly on both sides of the rim as pressure builds.
- Reinstall the wheel, reconnect the brake, and test the brakes before riding.
Removing the wheel from the frame
Most modern bikes use quick-release levers or bolt-on axles. For a quick-release wheel, open the lever on one side and unscrew the opposite end by hand until the axle is loose enough to slide out. For bolt-on wheels, use an appropriately sized wrench to remove both bolts, then set them somewhere you will not lose them.
On the rear wheel, you may need to pull the derailleur back and out of the way to create clearance. Lift the chain off the smallest cog, then slide the wheel forward and out of the frame. Set the wheel on a clean surface where you can work without the tire rolling away.
Deflating and removing the tire
Press the valve to release all remaining air from the tire. If you have a Presta valve, unscrew the small locking nut at the top first. Once the tire is completely flat, use your tire lever to pry one edge of the tire bead (the inner edge that sits on the rim) away from the rim. Insert the lever under the bead, then twist or pry gently until a section of tire lifts clear.
Work your way around the wheel with the first lever, lifting the bead progressively. Once you have lifted the bead all the way around on one side, the tire will be loose enough to remove by hand. Slide the old tube out from inside the tire. Do not discard it yet — keep it nearby in case you need to patch it later or confirm the cause of the flat.
Before installing a new tube, inspect the inside of the tire carefully. Run your fingers along the interior surface to feel for thorns, glass, or sharp debris. Look for cuts or bulges in the tire itself. If you find a thorn or shard, remove it. If the tire is damaged, you will need to replace it, not just the tube.
Installing the new tube and seating the tire
Inflate the new tube slightly — just enough that it holds its shape and is not completely flat. This prevents twisting and pinching when you install it. Slide the tube into the tire, starting at the valve. Make sure the valve stem goes through the rim hole straight, not at an angle.
Tuck the tire bead back onto the rim by hand, working your way around the wheel. Start opposite the valve and work toward it from both sides. This is easier than it sounds — the tire bead will naturally want to sit on the rim. Push the bead down into the rim channel as you go, making sure no part of the tube is pinched between the tire and rim.
Once the entire tire is seated by hand, check that the valve is still straight and the bead looks even on both sides of the rim. If one side of the bead is higher than the other, the tube may be pinched. Deflate slightly, adjust, and reseat. This step prevents pinch flats when you inflate.
Inflating the tire to the correct pressure
Attach your pump to the valve, making sure the connection is tight and find. Begin inflating slowly, watching the tire bead as pressure builds. The bead should seat evenly into the rim channel on both sides. If you see the bead bulging unevenly or the tire not seating properly, stop, deflate, and reseat by hand again.
Inflate to the pressure range printed on the tire sidewall. This range varies widely depending on tire width and type — road tires often run 80 to 130 psi, while mountain bike tires run 25 to 50 psi. Start at the lower end of the range if you are unsure. You can always add more air, but overinflating can damage the tire or tube.
Once the tire reaches the target pressure, remove the pump and check the valve for leaks. A small hiss when you first remove the pump is normal. If air continues to escape, the valve may not be seated correctly. Deflate, reseat the tube and valve, and try again.
Reinstalling the wheel and reconnecting brakes
Lift the wheel and slide the axle back into the frame dropouts (the slots where the wheel sits). For the rear wheel, guide the chain onto the smallest cog as you insert the wheel. Make sure the axle is seated fully in both dropouts before tightening.
Tighten the quick-release lever or bolts until the wheel is snug and does not move side to side. The wheel should spin freely without rubbing on the frame or brake pads. If it rubs, the wheel may not be centered in the frame — remove it and reseat it.
Reconnect the brake cable or brake caliper if you disconnected it during wheel removal. Spin the wheel and squeeze the brake lever to confirm the brakes engage smoothly without rubbing. Test both brakes before riding. If the brake pads are rubbing the rim or rotor, you may need to adjust the brake alignment, but that is a separate task.
Frequently Asked Questions
What should I do if the tire keeps going flat after I change the tube?
The most common cause is a pinched tube — the tube gets caught between the tire bead and rim during installation. Inspect the old tube for small holes or damage. If you find pinch marks, reseat the tire more carefully next time, making sure the bead is fully seated by hand before inflating. A second cause is debris still inside the tire. Run your fingers along the interior again, checking for thorns or sharp objects you may have missed.
Can I patch a tube instead of replacing it?
Yes, if the hole is small and not near the valve. Dry the tube completely, roughen the area around the hole with sandpaper from a patch kit, explore the adhesive, wait the time specified on the kit, then press the patch firmly in place. Patches work well for small punctures but are slower than carrying a spare tube. Many riders carry both a spare tube and a patch kit as backup.
How do I know if my tire is damaged and needs replacing?
Look for cuts, bulges, or areas where the rubber is worn through to the casing underneath. Small cuts on the tread may not require replacement, but cuts on the sidewall or bulges mean the tire structure is compromised and should be replaced. If you see these issues, install a new tire rather than just a new tube.
What is the difference between Presta and Schrader valves?
Presta valves are narrower and have a small locking nut you must unscrew before air can escape. Schrader valves are wider and work like car tire valves — you just press to release air. Your pump must have the correct head for your valve type, though some pumps have reversible or dual heads that work with both.
Do I need to remove the wheel to change a tire?
Yes, you need to remove the wheel from the frame to access both sides of the tire and work the bead off the rim. Some riders with experience can change a tire without removing the wheel, but it is much harder and not recommended for beginners. Removing the wheel takes a few extra minutes but makes the job significantly easier.