how far can i drive on a spare tire

You can generally drive about 50 miles (80 kilometers) on a spare tire if it is a temporary or "donut" spare, and at speeds not exceeding 50 miles per hour (80 km/h). Full-size spare tires can typically be driven farther, up to about 100 miles, and at normal speeds (up to 70 mph), but they are still not meant for long-term use and should be replaced as soon as possible. Driving too far or too fast on a temporary spare can risk another flat tire or damage to the vehicle, especially to the transmission. Always check your vehicle’s manual and the markings on the spare tire for specific guidance. Regularly checking the spare’s air pressure is also important to ensure it’s ready when needed.