Not all of them do--there are "super single" tires available, which are twice as wide as regular truck tires--but dual wheels do two things for you. First, they hold more weight than singles, and that's always good. Also, if you blow a tire on a dual assembly, the one that's left will allow you to "limp" the truck to a repair shop instead of having to make an expensive call to a truck stop so they can install a new tire alongside the road.
The spare tire is under the rear of the truck.
Large comercial trucks In North America, Lorry in Europe, generally have two (or more ) rear axles. This causes the tires to resist tight turn, causes tire wear and makes the truck make much wider longer turns. If the rear axle steers it reduces the turn size, reduces tire wear and in general makes the truck easier to drive in tight spaces.
the spar tire is underneath the rear of the truck (behind the bumper).
2 driving axles on for each front tire. but 4 in total unless its a dependent rear suspension then there are 3 to the best of my knowledge
On the 1997 Ford F150, the differential could be in both the front and rear. From 1997 and on Ford used two different axles. Your truck could either have the 8.8 or 9.75 differential. If you have a rear differential you would need to lower your spare tire to have access to it.
A spare tire on a 2002 Ford Ranger can be found on the underside of the rear of the truck. The tire can be removed with a ratchet.
Thw wheelbase is the distance between the centers of the tire contact patches, which is the same as the distance between the front and rear axles.
on a truck it is for carrying weight.on a hot rod it is for traction.
underneath the rear of the truck - lets down with a crank
No. A tire is a tire. Wheels and axles are entirely separate components.
the axles or suspension.
The spare tire is located under the rear of the truck. Insert the flat end of the tire iron into a hole located on the right side of the rear bumper and crank until the tired drops down to the ground.