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Similar traction-improving patterns have been implemented on the surface of the wheels on tractors. These include strakes , where material is removed from the surface of the wheel to achieve protrusion; cleats , with spikes instead of straight bars; and lugs with raised rubber on a tire tread .
However, now, bigger versions of the heavy-duty tire changers are designed to mount/demount tires up to 95 inches (2.4 m) in diameter and also feature a hydraulically operated self-centering four-jaw chuck with clamping jaws that can clamp from 14 to 58 inches (0.36 to 1.47 m) either from the wheel’s inside or from the center bore.
The first deliberate uses of bar grip tyres as off-road tyres, were developed pre-war as truck tyres particularly for army use. They used crosswise tread bars for grip, arranged in a helical pattern. [4] A helical pattern was used to avoid the uneven rolling radius and vibration of a tread with simple crosswise bars and large gaps between.
A large ballast tractor pulling a load using a drawbar General duty tow hitch from VBG on a truck and a drawbar on a trailer, showing a connected drawbar eye Rockinger drawbar coupling, in which the drawbar eye gets locked. A drawbar is a solid coupling between a hauling vehicle and its hauled load. Drawbars are in common use with rail ...
Tire irons, which usually come in pairs or threes, are used to pry the edge of a tire away from the rim of the wheel it has been mounted on. After one iron has pried a portion of the tire from its wheel, it is held in position while a second iron is applied further along the tire to pry more of the tire away from the wheel.
In 1995, Tire Rack began its website where it posted reviews of tires it sold. [2] In 1998, Tire Rack began online sales. [ 3 ] Since 1995, Tire Rack has been the title sponsor of the National Sports Car Club of America (SCCA) Solo Program, a club that allows driving enthusiasts to compete at a local level.