How to Replace a Mountain Bike Tire [A Step-by-Step Guide]

Last Updated on August 26, 2025 by Jaxon Mike

As an avid mountain biker, I know how frustrating it can be when you get a flat tire out on the trails. Whether it’s a puncture from a sharp rock or just general wear and tear, a flat can put a damper on your ride and leave you stranded. But don’t worry, with a little know-how, replacing a mountain bike tire is a relatively straightforward task that you can easily tackle yourself. In this comprehensive guide, I’ll walk you through the step-by-step process of replacing a mountain bike tire, so you can get back on the road (or trail) in no time.

Gathering the Necessary Supplies

Before we dive into the replacement process, let’s make sure you have all the tools and materials you’ll need. Here’s a quick checklist:

• Replacement tire (make sure it matches the size and tread of your current tire)
• Tire levers (plastic or metal will work)
• Bike pump or CO2 inflator
• Patch kit (just in case you need to repair the tube)
• Gloves (optional, but can help protect your hands)

Removing the Old Tire

Okay, now that you have everything you need, let’s get started with the tire replacement process. First, you’ll need to remove the old tire from the rim. Here’s how:

Step 1: Deflate the Tube

Use your bike pump or CO2 inflator to completely deflate the tube inside the tire. This will make the tire much easier to remove.

Step 2: Locate the Valve Stem

Find the valve stem on the tube, as this will be your starting point for removing the tire.

Step 3: Use Tire Levers

Insert one of the tire levers under the bead of the tire, being careful not to damage the rim tape or tube. Gently work the lever around the rim, hooking the tire over the edge. Repeat this process with the second lever until the tire is completely off the rim.

Installing the New Tire

Now that the old tire is off, it’s time to put on the new one. Here’s how:

Step 1: Inflate the Tube

Before inserting the new tube, use your pump or CO2 inflator to inflate it slightly, just enough to give it some shape.

Step 2: Insert the Tube

Gently insert the valve stem of the tube through the hole in the rim, then work the rest of the tube into the tire, making sure it’s not twisted or pinched.

Step 3: Seat the Tire

Starting opposite the valve stem, use your hands to work the tire bead over the rim. Make sure the tube is not trapped between the tire and the rim as you do this. Once the tire is seated, go around the entire rim to ensure it’s properly in place.

Step 4: Inflate the Tire

Use your pump or CO2 inflator to inflate the tire to the recommended PSI, which you can find printed on the tire sidewall.

Troubleshooting and Maintenance

Even with the best tire replacement techniques, sometimes things can still go wrong. Here are a few tips for troubleshooting and maintaining your new mountain bike tire:

Slow Leaks

If you notice your tire slowly losing air, it’s likely due to a small puncture or hole in the tube. Use your patch kit to repair the tube, or replace it entirely if the damage is too severe.

Uneven Wear

If you notice one side of your tire wearing down faster than the other, it could be a sign of improper inflation or an alignment issue with your bike. Check your tire pressure regularly and make sure your bike is properly tuned up.

Tire Replacement Frequency

As a general rule of thumb, you should replace your mountain bike tires every 500-1,000 miles, or whenever you notice significant wear and tear. Keep an eye on the tread depth and overall condition of the tire, and don’t hesitate to swap it out if it’s starting to look a bit worse for wear.

Conclusion

Replacing a mountain bike tire may seem like a daunting task, but with the right tools and a little bit of practice, it’s a skill that every cyclist should have in their toolkit. By following the step-by-step guide I’ve outlined here, you’ll be able to get your bike back on the trails in no time, without having to rely on a repair shop or other outside help. Happy riding, and remember to keep those tires in tip-top shape!

FAQs

How often should I replace my mountain bike tires?

As a general rule of thumb, you should replace your mountain bike tires every 500-1,000 miles, or whenever you notice significant wear and tear. Keep an eye on the tread depth and overall condition of the tire, and don’t hesitate to swap it out if it’s starting to look a bit worse for wear.

What size tire should I get for my mountain bike?

The tire size you need will depend on the specific make and model of your mountain bike. Most modern mountain bikes use either 26-inch, 27.5-inch, or 29-inch tires. Refer to the tire size information printed on the sidewall of your current tire, or consult your bike’s manufacturer, to ensure you get the right replacement.

Can I use a road bike tire on my mountain bike?

No, you should not use a road bike tire on a mountain bike. Road bike tires are designed for smoother surfaces and have a narrower profile, less tread, and lower rolling resistance. Mountain bike tires, on the other hand, are built to handle the rougher terrain and provide better grip and puncture resistance. Using the wrong tire type can compromise your bike’s performance and safety.

How do I properly inflate my mountain bike tires?

The recommended tire pressure for your mountain bike tires will be printed on the tire’s sidewall. Use a reliable bike pump or CO2 inflator to bring the tires up to the specified PSI. It’s important to check your tire pressure regularly, as the proper inflation level can vary depending on the terrain, your riding style, and other factors.

What should I do if I get a flat tire while riding?

If you get a flat tire while out on the trails, first try to locate and patch the puncture using a tire repair kit. If the damage is too severe or you don’t have a repair kit with you, you’ll need to replace the tube entirely. Make sure you have a spare tube and the necessary tools (tire levers, pump, etc.) with you before setting out on your ride.