How to change and fix a flat bike tire

How to change and fix a flat bike tire

If you are a cyclist, you will inevitably get a flat tire. Getting a flat tire is a hassle, and disrupts your ride, but it’s easy to fix if you’re prepared.  Always make sure you have all the proper equipment and follow this easy tutorial on how to fix a flat bike tire and get your bike rolling again in no time.

1. Detach the Wheel from the Bike

● First, release your brakes. Most brakes use a quick-release system to disconnect and reconnect them. However, not all bicycles have the same type of brake systems.

● Next, remove the wheel. Removing the front wheel from the axle should be easy. Release the brake, open the quick-release lever, loosen the skewer and pull the wheel from the fork dropouts. The rear wheel is harder. Proceed by shifting the chain onto the smallest cog. Turn your bike over and then turn the release lever of the axle to remove the wheel.

2. Get the tire off the wheel
To get the tube off the wheel, first, deflate the tube if there is still remaining air inside. Next, slip the flat end of a tire lever under the bead; hook the other end onto an adjacent spoke. Insert a second lever under the bead and slide it between the tire and rim until one side is completely off. Remove the other side and pull out the damaged inner tube.

3. Inspect for Damage
Using your fingers and your eyes, check the tire, inside and out to identify what caused the flat. Check for any sharp objects which could have punctured the tube.

4. Installing the New Tube
Before installing the new tube, add a few pumps of air to avoid pinching the tube when putting it back. Starting with the valve stem, lower the tube onto the wheel, inserting the valve into the rim valve hole. Then, proceed to push it into place around the rest of the tire.

5. Inflate Carefully
Now inflate your tire slowly to its recommended pressure.

6. Knead the Tire Back into the Rim
Put one side of the tire onto the rim and fix it properly, making sure there is no pinching. Proceed around the wheel, pinch both sides of the tire in towards the center of the rim.

7. Re-attach the Wheel

Fit the fork onto the skewer and tighten.

Hold up the bike’s back half, then focus on getting the wheel positioned so that the cogs are anywhere in between the chain. Then, set the bike down and tweak until the frame and wheel are properly mated. Tighten the skewer and brake, then roll.

Video by Trek Bicycle

How to Fix a Flat

Hi, I’m Ross Rushin at Trek Bicycles.
I’m here today to teach you how to change a flat tire.
Before you go on your ride, make sure you have all of the proper equipment.
When you get a flat tire, the first step is to remove the rear wheel from the bike.
Start by shifting to your hardest gear.
Then pick up the bike and pedal it by hand to move the chain to the smallest cog.
Next, use the lever on the side of your brakes to loosen the brakes.
Now open your quick-release lever so you can pull the wheel out by holding the wheel down with your right hand
and lifting up on the bike with your left hand.
Tilt the wheel to remove it from the frame and lay the bike down on the non-drive side.
Different types of bikes have different types of brakes.
To release a V-brake, start by moving the dust cover out of the way.
Grab the cable with one hand, the bracket with the other hand,
and pull them apart until you can unseat the cable and release the brake.
To reattach the brake, grab the cable with one hand, the bracket with one hand,
and pull them together until you can seat the cable inside the bracket.
Move the dust cover back into place.
Different types of bikes also have different types of shifters.
On a bike with a flat handlebar, shift to your hardest gear using your index finger.
Now that we have the wheel off the bike, we can continue fixing this flat.
Start near a spoke and use the scooped end of the tire lever to grab the edge of the tire.
Then use that spoke to attach the hook of the tire lever and hold it in place.
Go a few inches down.
Now that we have a few inches off, we’re going to continue around the wheel
and take the rest of this side of the tire off.
We’re finished using our tire levers for now, so we can set those down.
And now we’re going to start by pulling the tire side, removing that valve stem,
and just take the rest of the tube out.
Before we put a new tube in, we want to make sure that whatever caused that flat is not still in the tire.
So gently run your fingers through the inside of the tire making sure you don’t feel anything sharp.
And at the same time, visually check the outside of the tire in case you see any debris that’s still stuck in there.
Now that we know there isn’t any debris left in the tire, it’s time to put the new tube in.
When you pull your tube out of your seat bag, it’s going to be really flat like this.
That’s going to make it difficult to work with.
So we’re going to use our CO2 inflator or your mini pump to put just a little bit of air in the tube
to give it some shape and make it easier to work with.
Just enough air to make it round.
With just a little bit of air in the tube, we’re going to start back at the valve stem hole
and we insert the tube opposite the way we took it out.
Insert the valve stem and then work your way around the tire and just tuck that tube under the tire.
And you can see we’ve got the tube all the way up in the tire.
Now we can worry about getting tire back on the rim.
We’re going to start at the valve stem again.
This area of the tire can be a little bit tighter and a little bit more tricky, so we want to get this done first.
And I’m going to use both of my thumbs to just push the edge of the tire back onto the rim.
So we’re working our thumbs all the way around the rim.
I always try to get the tire on with just my hands if possible.
It’s always the best idea.
But if you get to this part and it’s just too tight to get this tire back on,
you can very carefully use your tire lever to help you get this edge of the tire back on.
So using that scoop the opposite way, we’re going to very, very gently use it to press the tire back on.
Next, we want to make sure we didn’t pinch the tube anywhere between the tire and the rim.
So carefully move the tire aside and go all the way around the wheel
making sure you don’t see the tube sticking out anywhere.
Now we’re ready to inflate the tire using either your frame pump or your CO2 inflator.
Tire’s inflated and we’re ready to reinstall the wheel.
To get the rear wheel back on the bike,
start by using the end of your quick-release lever to move the bottom part of the chain out of the way
so that you can get the wheel into the frame.
Lay the chain on top of your smallest cog and then gently push the bike into place.
Now close your quick-release lever.
Remember to close your brake.
Give the bike a pedal to make sure it’s all running smoothly and your flat is fixed.