A spare tire or spare tire (or stepney ) are additional tires (or tires - see spelling differences) brought in a motor vehicle instead of one flat, explosive, or other emergencies. Spare tires are generally misguided, because almost all vehicles actually carry all the wheels with tires mounted on them instead of just tires, such as tires to wheels will require the rider to carry special equipment. However, some spare tires ("space saver" and "donut" type) are not intended to be driven remotely. Space saver has a maximum speed of about 50 mph (80 km/h).
When replacing a damaged tire, placing a compact spare part on a non-propeller axle will prevent damage to the drivetrain. If placed on the drivetrain shaft, smaller diameter tires can put pressure on the differential that causes damage and reduces handling.
Video Spare tire
Histori
The early days of motor travel took place in primitive streets filled with horses horses. Punctures (flat tires) are all too common, and require the rider to remove the wheels from the car, pull out the tires, patch the tires, reinstall the tires, inflate the tires, and reattach the wheels.
To reduce this time-consuming process, Walter and Tom Davies of Llanelli, Wales, discovered a spare tire in 1904. At that time, cars were made without spare wheels. Their company, Stepney Iron Mongers, has agents that distribute the United States, Belgium, France and Italy. The word "stepney" is sometimes used interchangeably in countries that once belonged to the United Kingdom such as Pakistan, Bangladesh, India and Malta
The first to equip the car with the assembly of spare tires and inflated tires is the Ramblers made by Thomas B. Jeffery Company. Rambler's interchangeable wheels with sprung and inflated tires allow the rider to exchange them quickly for a leaky tire that can then be repaired at a more convenient time and place.
The combined tire and wheel combinations have proven to be very popular among motorists who carry up to two spare tires into common. Cars are often equipped with one or two sidemount cars. Spare parts are mounted on the back of the front fenders as they coalesce with the on board board (the narrow footboard serves as a step under the door).
In 1941, the US government banned spare tires for new cars. The lack of resources caused by World War II caused quotas and legislation designed to compel conservation, including rubber produced overseas and difficult to obtain. A similar ban was also applied by the United States during the Korean War in 1951.
Maps Spare tire
Usage in the 21st century
Contemporary vehicles can be fitted with full-size parts, minispiare of limited use, or have run-flat capability.
- Spare tires may be the type and size identical to those in the vehicle. Spare parts can be mounted on top of ordinary steel rims or suitable road wheels such as those found in vehicles. Among passenger vehicles, full-sized spare parts are usually reserved for sport utility vehicles and light trucks, as "limited use" reserves will adversely affect the vehicle with a higher center of gravity. In addition, "restricted use" reserves may be unsafe on fully loaded trucks or which attract trailers. Due to the size of the full-sized backup, it is often installed outside, like the rear door of the SUV, and sometimes on the front hood.
- Certain vehicles are equipped with "limited-use" spare tires, also known as "space savers", "donuts," or "compact" tires - in an effort to reduce costs, lower vehicle weight, and/or save necessary space for full size reserve tires. These supposed benefits are highly debatable; Space savers are typically only 7kg lighter than full-sized wheels and in some cars called 'space savers' can save a bit of space. There is also the difficulty of transporting large wheels and tires after the space saver is installed. Spare parts are usually mounted on a regular steel rim. They are usually smaller than normal tires on vehicles and can only be used for limited distances due to short life expectancy and low speed rating. Additionally, because of the different sizes of donuts compared to ordinary wheels, electronic stability control and traction control systems will not work properly and should be disabled until the original wheel is restored. Spare room tire reserves are also very disruptive to braking (especially on cars not equipped with anti-lock brakes) and car handling.
- In some cases, the car may be equipped with a run-flat tire so that it does not require a separate spare tire. Other vehicles may carry a can of tire repair foam, to fix a leaky tire, although this often does not work in larger puncture cases, and is useless in case of blow-outs.
Storage
The spare tire in the car is often stored inside the spare tire properly - the area hidden in the trunk of the vehicle, usually in the middle, where the spare tire is stored when not in use. In most cars, spare tires are secured with bolts and wing-style ties. Usually a rigid cardboard sheet rests on a spare tire well with a carpet on it to hide the spare tire and gives a pleasant look to the flat surface for the luggage space.
Other storage solutions include storing the reserves in the cradle under the rear of the vehicle. This cradle is usually secured with bolts that can be accessed from inside the trunk, for safety. This setting has the advantage of storing the tires in the trunk, including not having to empty the contents of the trunk to access the wheel and this setting can also save space in some applications. But it has a disadvantage because the tire gets dirty, making the act of changing tires more unpleasant and the mechanisms can also rust on older cars, making it difficult to free up the reserves. The composition of the holder is usually only practical on the front-wheel drive car, since the holder will block the rear axle in most of the rear or four wheel drive cars. Similar arrangements are also often found on trucks where the reserves are often stored under truck beds.
Many sport utility vehicles (SUVs) and off-road vehicles have externally mounted spare wheels - usually at the rear door, but others may be mounted on the roof, side, or even on the hood.
In the middle-engined and rear-engined cars, spare tires are generally stored in the front trunk.
Some vehicles keep spare tires in machine bay, such as Renault 14, first generation Fiat Panda and older Subaru vehicles, such as Subaru Leone.
Vehicles such as the Volkswagen Beetle use spare tires for additional purposes such as supplying air pressure to the windshield washer system.
Many of the Bristol car models - from 404 in 1953 to the Fighter of 2004 carrying full-size reserve wheels and tires in shopping cart compartments built on the left wing. This not only enhances luggage space and allows easy access to the reserve without having to disassemble the trunk but increases the weight distribution by keeping as much of the mass as possible within wheelbase and balancing the battery weight, which is installed in the same compartment on the right-hand wing.
See also
- The backup wheel cover
- Continental tire
- A flat tire
- Ban whitewall
References
External links
Source of the article : Wikipedia
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