How To Fix A Flat Bike Tire

Hello, my name is John. I am from On Your Bike in London. I have been a bike mechanic for the twelve years.

I am going to show you a few things about bike, things about saddle height and setting it up, besides the correct size and a few maintenance tips as well. How to fix a flat tire? When you got a puncture, what you need to do is remove the wheel and change the tube that you will find inside the tire. This one's got nuts for getting the wheel off, so I'll use a spanner in which case.

This one is a fifteen. You may have a bike with quick release, which we pull down, and rotate. I'll show you one of those afterwards.

Just undo this and the wheel will come out, and if you get some tire levers and just hook them underneath the tire. Gently go around the wheel, taking the tire out of the rim. Once you get it back, also goes all the way around.

You will find that, you can find that you can just run the tire lever around the wheel which just releases the tire. Just make sure you use plastic levers because if you got aluminum which most bikes have these days, you will find that mark or score on the rim. Once the side of the tire, you can pull the uni-tube out, gently pull.

And then just pull out the valve pulp. Went down to the shop and bought a new tube which we are going to install. What you need to do is just put some air into it.

Just get some shape into the tube. Push there and then gently pump, it should get some shape, then start off with the valve pulp, just put it in there, those two in there and then if I lay the wheel on the floor, it should be easier and just place the tube into the tire. If you find this tube big, you might need to let a little bit of air out of the valve.

And then what we do is gradually do is the start with the valve, slowly put the tire back into the rim. Tire pressure will be marked at the side of the tire. This one is 55 psi, which has got marked in the side.

And then locate that back into the bike, I am not going to do it too tight because I am going to connect the brakes, make sure they are levelled. Make sure they are working and equal. .