Never change a tire on a hill or on soft dirt.
Before you can fix the problem, make sure your car is equipped with: Instruction Manual For Changing A Tire
Consult your manual for the "jacking point" (the sturdy metal part of the frame). Position the jack and raise the car until the flat tire is about six inches off the ground. Never change a tire on a hill or on soft dirt
Before you lift the car, use the lug wrench to loosen the nuts. Turn them counter-clockwise. Don’t take them all the way off yet —just break the tension. If they’re stuck, use your body weight to push down on the wrench. Instruction Manual For Changing A Tire
Most spare tires (especially "donuts") are not designed for high speeds or long distances. Usually 50 mph.
