Learn how to replace a bike tube from Silk Road Cycles' Brendon Nicholas in this Howcast bicycle repair and maintenance video.
So, we’re going to learn how to replace your bicycle tube. Which is very important if you have a flat or if you need to replace your tire.
Basically what you’re going to do first is you are going to figure out what size tire you have and also what size valve you need or what type of valve you need. So this tire, basically all tires will say on the sidewall what size they are. This is a 700C by 28. Really easy to get at a bicycle shop.
So get the tube. The tube says 700 by 25-35. So it’ll have a range. You can usually go a little bit lower than the range. This is a 28 so you could do like a 23-25, but this is a very good range for this tire.
Also for this wheel we are going to need a Presta valve. Which basically means a French valve that looks like this. The other valve that’s most common in the United States is this valve which is called a Schrader valve. It’s very important that you get the right valve because it’s a different size hole in your rim.
To inflate the Presta valve, what we’re going to do is we take this little screw on the top here and unscrew it. It won’t come off. It sticks at the top. Release the air a little bit. Use your pump that’s made for a Presta valve and start pumping up the tube just enough so it inflates it so it makes it round. Then you’re going to start with the valve. Put the valve in first.
Once you have the valve in, start pushing the slightly inflated tube into the tire and the rim. Once you have the tire and the tube pushed into the rim and the tire, then you can start at the valve by using the back of your hand and pressing the other side of the tire up onto the rim making sure that you’re not pinching the tube so you don’t get a hole in the brand new tube that you just installed.
So now that you’re coming to the end, sometimes it gets really hard so you have to take your tire lever to push the actual tire up onto the rim. You just have it upside down, hook it onto the rim, and start pressing it up over the rim making sure that you not pinching the actual tube.
Once you’ve installed the tube, make sure that the seam that goes all the way around the tire looks the same all the way around. You want to make sure that it’s not pointing out too much or it’s not pushing in too much or else you’ll have a blow-out.
Now you can pump up your tire to the recommended inflation pressure. Basically it will say on the sidewall of your tire, say, maximum inflation pressure to 85 psi. So you can obviously do a range. You can do 60-80 psi. Somewhere within usually 10-20 psi is pretty good. Once you get up to pressure, you take off your pump, make sure that you take the screw down the top of the valve if it’s a Presta valve, or if it’s a Schrader valve make sure you put on the cap so it stays clean.
That is how to replace your tube in your tire.