How to Change a Mountain Bike Tire? | Field Swap Basics

Flats happen on the trail, and knowing how to change a mountain bike tire gets you rolling again without a trip to the shop. You’ll need tire levers, a pump, and the right technique for your wheel type. The steps below follow Park Tool’s standard procedure, which works for both tube and tubeless setups.

Removing the Wheel by Axle Type

Wheel removal depends on whether your bike has quick-release or thru-axle hardware; using the wrong method can damage the axle or drop the wheel while riding.

Quick-release wheels: Open the lever to the open position. If the wheel doesn’t slide out, unscrew the lever a few turns—it should loosen, not spin freely. Pull the wheel straight down out of the dropouts.

Thru-axle wheels: Open the lever, unthread the axle counterclockwise, and pull it fully out before removing the wheel. Keep the axle with you; you’ll need it for reinstallation.

Removing the Tire and Tube

Release all remaining air before prying anything. For Presta valves, unscrew the small nut first, then press down on the valve core. For Schrader valves, press the pin in the center. A tire with air in it fights every lever stroke and risks tearing the bead.

Park Tool’s removal sequence works on any trail:

1. Fully deflate the tire—push the valve core to confirm no air remains.
2. Insert one tire lever under the bead and hook the end to a spoke.
4. Remove the opposite bead by hand and pull out the tire and tube together.

Once the tire is off, inspect the inside of the casing for the cause of the flat—a thorn, glass, or a sidewall tear—before installing fresh rubber.

Installing a New Tire or Tube

Park Tool’s installation method prevents the two most common causes of trail-side frustration: pinched tubes and misaligned beads.

1. Put just enough air in the tube to give it shape—about one or two pumps.
2. Place the valve straight through the rim hole, pointing toward the hub. A valve angled sideways can be cut by the rim edge, Park Tool warns.
3. Work one bead onto the rim by hand, then the second. Use a tire lever only if necessary, going slowly to avoid pinching the tube between the lever and rim.
4. Inflate slightly and confirm both beads are fully seated around the entire rim before inflating to the tire’s recommended pressure, printed on the sidewall.

Before final inflation, check that the tube isn’t caught under the bead. If you see a bulge or the valve sits crooked, deflate and start that side over. For new rubber, a budget set of mountain bike tires tested for value often has stiffer casings that take a little more coaxing.

Tubeless Tire Differences

Tubeless tires follow a different procedure because they seal against the rim without an inner tube, and the sealant inside needs handling.

Park Tool’s tubeless method: deflate fully, push both beads into the center channel of the rim, and remove the tire. Wipe off dried sealant from the rim bed—Canyon’s guide notes that dried sealant may remain on the rim tape and should be cleaned before reassembly. Check that the valve is secure, align any rotation arrow on the sidewall with wheel rotation, install the first bead, then install the second starting at the valve, leaving part uninstalled. Add fresh sealant through the valve or into the tire before seating that final section.

Sealant residue is fluid, and Park Tool says to dispose of it per the manufacturer’s recommendations. Tread direction matters; sidewall arrows tell you which way the tire rolls for maximum grip.

Common Mistakes to Avoid

• Leaving air in the tire. A partially inflated tire makes removal harder and increases the chance of damaging the tube or bead.
• Lever aggression. Using a lever too forcefully during installation can pinch or cut the inner tube. Let your hands do the work; levers are for stubborn final inches.
• Angled valves. A valve not pointing straight toward the hub can be cut by the rim, causing a flat before you even ride.
• Wrong wheel-removal method. Match the procedure to your axle type—quick-release levers don’t unthread, thru-axles always do.