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2. Pneumatic trail - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_trail

   Pneumatic trail or trail of the tire is a trail-like effect generated by compliant tires rolling on a hard surface and subject to side loads, as in a turn. More technically, it is the distance that the resultant force of side-slip occurs behind the geometric center of the contact patch .

3. Tire - Wikipedia

   en.wikipedia.org/wiki/Tire

   Pneumatic tires also have a much lower rolling resistance than solid tires. Because the internal air pressure acts in all directions, a pneumatic tire is able to "absorb" bumps in the road as it rolls over them without experiencing a reaction force opposite to the direction of travel, as is the case with a solid (or foam-filled) tire. [26]

4. Rubber-tyred metro - Wikipedia

   en.wikipedia.org/wiki/Rubber-tyred_metro

   The first idea for rubber-tyred railway vehicles was the work of Scotsman Robert William Thomson, the original inventor of the pneumatic tyre.In his patent of 1846 [2] he describes his 'Aerial Wheels' as being equally suitable for, "the ground or rail or track on which they run". [3]

5. Jack (device) - Wikipedia

   en.wikipedia.org/wiki/Jack_(device)

   A scissor jack uses the mechanical advantage of a leadscrew and 4-bar linkage to allow a human to lift a vehicle by manual force alone. They are inexpensive and are common in manufacturer-supplied breakdown kits. The jack shown at the left is made for a modern vehicle and the notch fits into a jack-up point [3] on a unibody. Earlier versions ...

6. Spare tire - Wikipedia

   en.wikipedia.org/wiki/Spare_tire

   A spare tire allows a driver to replace a flat tire and drive on A Stepney rim. An early approach to providing a car with a spare tire Dual sidemounted spare tires behind the front fenders on a 1931 Nash Ambassador Temporary use "space-saver" spare tire mounted in the trunk of a 1970 AMC AMX with a single use air canister Full size spare tire mounted in cargo space area of a 1993 Jeep Grand ...

7. Jockey wheel - Wikipedia

   en.wikipedia.org/wiki/Jockey_wheel

   The screw jack can then be used to lower the trailer nose onto the tow ball. Once securely attached to the towing vehicle, the jockey wheel's jacking action is fully retracted for stowage. The jockey wheel can also be unclamped and lifted as far as possible to give the greatest ground clearance before reclamping prior to a journey being made.