Some cars have a space-saver wheel as the spare wheel. Space-saver wheels are much smaller than the vehicle's other wheels so they take up less storage room.
Space-saver wheels are for emergency use only and are not designed to be used over long distances. If you get a flat tyre and replace a wheel with a space-saver wheel, you should only use it to get directly home or to a place where the flat tyre can be repaired or replaced.
The vehicle is likely to handle differently with a space-saver wheel. Drive carefully and don't drive faster than 80 km/h. If the space-saver wheel has a sticker showing a lower speed, then that speed applies.
Note: make sure the space-saver tyre is inflated to the correct pressure (which should be stated on it). This is much higher than normal tyre pressure."