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The MOT test [4] was first introduced in 1960 as a few basic tests of a vehicle and now covers twenty different parts or systems on or in the vehicle. [ citation needed ] The name derives from the M inistry o f T ransport, [ 5 ] a defunct government department , which was one of several ancestors of the current Department for Transport , but is ...
The tyre load index (LI) on a passenger-car tire is a two- or three-digit numerical code used to cross-reference a load & inflation table that will give the maximum load each tire can carry at a given pressure.
Uniform Tire Quality Grading, commonly abbreviated as UTQG, is a set of standards for passenger car tires that measures a tire's treadwear, temperature resistance and traction. The UTQG was created by the National Highway Traffic Safety Administration in 1978, a branch of the United States Department of Transportation (DOT). [ 1 ]
The Gross Vehicle Weight Rating (GVWR) is the maximum operating mass of a vehicle as specified by the manufacturer. In the United States this information is required to be on the vehicle's door placard. The load capacity of the total number of wheels on the vehicle combined must meet or exceed the vehicle's gross vehicle weight rating.
Tire uniformity refers to the dynamic mechanical properties of pneumatic tires as strictly defined by a set of measurement standards and test conditions accepted by global tire and car makers. These standards include the parameters of radial force variation , lateral force variation , conicity, ply steer, radial run-out , lateral run-out , and ...
Colorized tire footprint pressure distribution. The contact patch is the portion of a vehicle's tire that is in actual contact with the road surface.It is commonly used in the discussion of pneumatic (i.e. pressurized) tires, where the term is used strictly to describe the portion of the tire's tread that touches the road surface.
Ride height or ground clearance is the amount of space between the base of an automobile tire and the lowest point of the automobile, typically the bottom exterior of the differential housing (even though the lower shock mounting point may be lower); or, more properly, to the shortest distance between a flat, level surface, and the lowest part ...
Most modern cars, SUV and pickup trucks require minimum tyre speed rating of "S" (180kph), but the vast majority of mud-terrain tyres max out at a tyre speed rating of "Q" (160kph). [8] [9] [10] Mud-terrain tyres, may improve traction and have reduced braking distances on dirt roads where the rocks slightly are too big to fit into the grooves ...