What you’ll need
Take your wrench and unscrew the nuts on your hubs to remove wheel.
If flat is on your rear wheel, take off nuts and remove chain from your gears to remove wheel.
Once your wheel is off, make sure it's fully deflated by unscrewing and pressing on the valve stem.
Now take your tire lever and slip it in between the tire and wheel rim to fully separate the two.
It is now easier to remove the tire since it is halfway off the rim. Use your hands to take it off.
Next, simply pull the flat inner tube out of the rim.
Take your pump and insert your inner tube's valve stem. Pump it up to listen for where the hole is.
Once you've found the puncture, apply your tire patch kit. (Directions always found inside)
After applying patches over the puncture, re-attach inner tube and tire using the tire lever.
Pump up your tire by inserting it into the valve stem. Read your tire wall for maximum PSI.
You've repaired your tire! Now to put it back on your bike frame. Screw your nuts back on the hubs.