How to fix a mountain bike....(read description)?

ok, so the back tire of my bike is flat and I'm pretty sure it has a slow leak. I know a lot about bikes but what is mostly troubling me is that when i went to pump my tire since i can get the air to stay for at least a day ';the nozzle'; where you pump it went inside where the tube is and now it is stuck there. the only way i can probably fix is doing the steps like if i was going to change the tube. this means that i have to take off the back tire along with the chains and take out the tube. i want to know if there is an easier way or could you tell me how to take the change off properly and the tube out properly in detail?How to fix a mountain bike....(read description)?
You don't know very much about bikes if you can't take the tire off and fix a flat. Everyone should be able to fix a flat, one you do it the right way it's easy. If you have gears shift to the smallest gear in the back. That will make it easier to remove and replace the wheel. Always have a patch kit and spare tubes on hand.



http://bicycletutor.com/remove-install-w



http://bicycletutor.com/fix-flat-tire/How to fix a mountain bike....(read description)?
Just typical that it's the back tire...



You shouldn't have to remove the chain. Here's how.



Change gear so that you're on the smallest chainring and the smallest derailleur.



Unscrew the quick-release bolt (make sure you put the springs back on, and the right way round, so you don't lose them!) or locking nut, pull back the hanger and pull the wheel out.



From there, it's a simple tire change.



Then to re-mount the wheel... reverse the procedure. Make sure you line up the chain on the smallest derailleur ring.



Good luck, let me know if you need more info.
Best way to go about this is to change the tube from inside the tire, however you have to get underneath the tire in order to pull it out.



The slow leak is more than likely right nearby the base of the valve, at the base were you can't see cause it's concealed inside the tire. this occurs due to it scratching against the rim which happens especially if ya don't hold the valve with the other hand when pulling the pump off.



Easiest way is to just slide off the back wheel

The most common way that tubes are changed:

At bicycle shops you can buy levers that squeeze in between the rim and the tire... and you just lift the tire over the rim (best works with two levers but two isn't needed), even a non sharp butter knife would work. After you lift the tire over the rim, get a finger or another lever in there to bring the rest of the tire out on ONE side. Once you have one side of the tire out, just grab the inner tube sitting inside. If you're curious were the leak is, then pump it up a little and run it under water, look for air bubbles coming from the tube.



Now that one side of the tire is off. take a new inner tube, pump it up with maybe one push on the pump to make it flexible but easy to work worth. Tuck it in the tire not rim, valve part first which valve can go through rim. then tuck the rest in, then use your thumbs to push the tire back onto the rim. The last part of putting the tire back on the rim is ANNOYING, but keep at it or even try to use a lever to lift it over if your thumbs begin to hurt.



I have heard it's not always best to use tools, even bike levers meant for this can damage the tire... however, it's nearly impossible to do it by hand, so then ya don't have a choice, but the tires would be worn out by the time ya do enough damage over time by doing it using levers so it doesn't matter.



Make sure there is no part of the inner tube that is not tucked in the tire. push the tire back (not off), and make sure you don't see the inner tube. make sure you only see the tire itself and the rim... inner tube needs to be tucked in it's bed (the tire).
Just get a valve stem tool and unscrew the valve stem and replace it with a new valve stem.