To repair a punctured tyre: remove the wheel from the bicycle using a spanner or wrench, use tyre levers to remove the tyre from the rim, take out the inner tube and inflate it to find the puncture (look for air bubbles when submerged in water or listen for hissing sound), mark the puncture location, clean and roughen the area around the puncture, apply rubber solution/patch glue, place a rubber patch firmly over the puncture, wait for it to dry, reassemble the tube and tyre on the rim, and inflate to proper pressure.