Changing a tire

Changing the tire chamber is easy. The only critical part is to dispose of the right tools to do it. In order to change the tire chamber, you first need to remove the wheel from the bicycle frame. This is easier for the front wheel obviously, as there is no chain in your way. Most modern bicycles have fast release levers that you can loosen by hand. Then you unscrew the bolt on the other side of the shaft. Do not completely unscrew the bolt. Just unscrew it to the point it still hold on the screw. The wheel can usually be removed with the bolt still on like this. This will avoid losing the bolt in grass for example. For rear wheels, you also need to gently remove the chain from the gear module. This is easily done. Just go slowly as you move the wheel out of the frame.

Once the wheel is removed, you first need to completely deflate de chamber until it's in a full flat state. The next step is to use a tire remover lever, gently insert it on one side of the wheel rim, and enter it under the tire. Gently lift the tire side so that it goes over the rim and out of it. Then, slowly slide the remover lever on the side of the wheel rim so that you have made a full 360 degree movement. The tire should now be completely out of the rim on one side and inside for the other side of the tire.

Localize the tire inflation pin and push it back inside the rim hole. Then, move the tire chamber out, starting with the inflation pin, going through the side of the tire we previously moved over the rim.

Once you have the tire chamber out, you basically have two options: replacing it by a new chamber or patching the current one. It is usually recommended to carry a spare chamber with you so that you can quickly swap in the new chamber in the tire and later on, patch the old chamber if you which to do so when your back home. There is a third option that actually can work, although it is not guarantied. If you do not have a spare chamber with you and dispose of an auto-adhesive patch, you can put it on the defective chamber (make sure to scrub away dirt before) and then put it back inside the tire. Note that this will more likely only work on high pressure tires. Tires with more than 90 Lbs of pressure will probably allow the patch to remain tightly in place once you re-inflate the tire. The pressure itself will hold the patch in place such that it is not required to wait for the glue to fix. You may even be able to run for over 50 kilometres without using glue on the patch.

When the chamber is ready to be put back, start by the inflation pin. You will first need to unscrew the small ring on the inflation pin. Then, put the pin inside the tire by the side that was lifted with the tire lever tool. Align it with the rim inflation pin hole and insert it. Put big the ring on the inflation pin screw so that it firmly holds in place. Make sure the inflation pin is fully lined up with the rim so that it's perpendicular to it. Then, put the chamber all around the rim, inside the tire. Adjust the chamber so that it's evenly stretched all around the rim. An important thing to inspect before putting the tire back in place is to ensure that the rim spoke head protective band is in place all around. No spoke head should thus be visible inside the rim. Failing to do so may cause a flat tire as the chamber is re-inflated.

Once the chamber is back in place, we need to put the tire back in place. Using the tire lever tool, insert it such that the end tip of the tool is inside the rim edge. Then move the lever up (away from the wheel center) such that the tire goes back on the inside of the rim. With one hand, hold the tire in place. With the hand holding the lever tool, gently slide it along side of the rim such that the rest of the tire edge falls inside the wheel rim. In many cases, you will be better off starting with both bare hands, inserting the most of the tire you can. Then, finish the last section as described above using the lever tool.

We are almost done. Using the air pump, start inflating the tire but just so that it takes a rounded shape (not flat). The tire should still feel soft with the finger pressure. Take the tire and have it bounce on the ground as you turn 360 degrees, keep bouncing it as you turn. This will allow the chamber and the tire to evenly fall in place uniformly on the rim. Once this is done, fully inflate the tire until it reaches the prescribed pressure. Use a tire pressure tool for best results.

The last thing we need to do is to put the wheel back in place on the bicycle frame. For the rear wheel, before fully inserting the shaft in the frame holders, move the chain over the gear block. Then firmly set the wheel on the frame holders so that it rest at the very end of it. The wheel should be aligned with the frame and the brakes by now. Lastly, screw the bolt on the wheel shaft such that it is almost thigh. Leave about a turn loose so that you can use the quick release lever to make the wheel hold firmly. It is very important to ensure that the wheel is firmly fixed and that the quick release lever cannot be loosen by mistake.

This concludes your tire change.