How to change a rear bike tire with gears?

To change a rear bike tire with gears, follow these steps:

1. Shift the gears to the smallest cog to release tension on the chain.
2. Use a wrench to loosen the nuts or quick-release skewer holding the wheel in place.
3. Remove the wheel from the frame.
4. Use tire levers to pry the tire off the rim.
5. Remove the old tube and tire.
6. Insert a new tube into the tire and place it back onto the rim.
7. Inflate the tube slightly to give it shape.
8. Put the wheel back onto the frame and tighten the nuts or quick-release skewer.
9. Shift the gears back to the desired position.
10. Test the tire to ensure it is properly installed and secure before riding.