Spare Tires
Nearly all vehicles are equipped with a spare tire to be
used in case one of the vehicle's tires loses air and goes
flat. A spare tire can be a tire that matches the tires on
the vehicle or can be a compact spare. Compact spares
are designed to reduce weight and storage space but still
provide the driver with a tire in the case of an emergency.
Compact tires are typically one of three types: high pressure
mini spare, space-saver spare, and lightweight
skin spare.
A high-pressure mini-spare tire is a temporary tire.
It should not be used for extended mileage or for
speeds above 50 mph. A space-saver spare must be
blown up with a compressor that operates from the cigarette
lighter or a built-in air compressor. A skin spare
is a normal bias ply type tire with a reduced tread
depth.