Bicycle Maintenance & Repairs : How to Change a Flat Bike Tire

Bicycle Maintenance & Repairs : How to Change a Flat Bike Tire


Hi I’m Evan from Gregg’s Cycles and I’m going
to show you how to change a flat tire. The first thing you want to do is undo the valve
stem, take your valve cap off and then if there is any remaining air in the tire go
ahead and let most of that air out. Then with your tire lever go around the edge of your
tire, pull that guy off of there and pull your tube out and it is important to not remove
your tire but take your tube out and put some air in your tube and that will enable you
to go around the tube and you can kind of feel with your hand or listen with your ear
and see if you can feel a small puncture or hear some air coming out or a spot where it
may be bulging where there may be something stuck in the tube or see if you can feel anything
sharp or see maybe any glass that may have gone through the tire into the tube. Sometimes
you can’t see anything, sometimes it is just a mystery hole and you don’t know how it got
there but if you are able to find something what you can then do is use your valve stem
as a reference so you would find your rim where the valve pull is and then based on
where the hole is in relation to the valve stem, find that same spot in your tire so
you can go along your tire and maybe if you see a piece of glass or a thorn or a little
barb from a blackberry bush you can go ahead and pick it out. If you have a small sharp
object kind of pick some of those things out and then inflate your new tube with a little
air and then reinstall your valve stem first and go around here with the tire. Once your
tube is in there all the way go ahead and then reinstall your tire the rest of the way,
make sure you are using only your hands because if you do try to use a screwdriver or even
a tire lever or something like that you can end up pinching your tube between the tire
and the rim which is then called a pinch flat. It may not actually go flat until you get
out on the road and it actually has some serious pressure under it and then you’ll end up fixing
another flat on the side of the road and that’s no good. Make sure that your valve stem is
nice and straight in there, pump it up, replace your valve cap and reinstall your wheel. That
is how you fix a flat.