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You're here with Salt Lake City Bicycle Collective. I'm online at www.slcbikecollective.org. We
are here on behalf of Expert Village today and I'm going to show you how to change a
flat. The first thing you are going to do is open the brake right here so you can allow
room for the tire to slide out. Open the quick release, give it a few turns and that will
take it right out of the fork. Take the valve cork off here so that you can remove the valve
stem. Take one tire lever (sometimes you might need two). Hook it underneath the eve and
if you pull it towards you that will allow it to come off all the way around. Go ahead
and pop the valve stem out of here and remove it from the wheel. The key thing at this point
is you want to make sure that you leave the tire in the same position that it came off
the rim, so that when you do finally find out what caused the flat, you can line it
up with that area and make sure that you can take out whatever caused the flat. You are
going to add a little air to it, so that you can get to the point at which air is coming
out, and you can locate the hole. So I would pump this up to maybe fifteen PSI, maybe twenty.
Get some air in here and remember to keep the orientation of the tube so that you can
locate it back on the tire. I'm going to go all the way around and look for what may have
caused the flat. Find that hole and go ahead and match that up with the tire. Locate whatever
that might have been in the tire. You want to check this side and you also want to check
the inside of it as well. If it's a thorn or whatever it might be, you want to squeeze
it together and pull it out of there. It might be a wire tie, it might be a screw, you never
know. Once you've located that, you can go ahead and set the other tube aside. You won't
need it anymore. Take the new tube out of the box, put a little bit of air into it (maybe
ten PSI), just to give it a little bit of shape so that it's easy to put back in. After
you've done that you want to go ahead and put it in the tire first.