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Alloy wheels have long been included as standard equipment on higher-priced luxury or sports cars, with larger-sized or "exclusive" alloy wheels being options. The high cost of alloy wheels makes them attractive to thieves; to counter this, automakers and dealers often use locking lug nuts or bolts which require a special key to remove.
Cast alloy wheels are now more commonly used; forged alloy wheels are used when weight is critical. The invention of the wheel has also been important for technology in general, important applications including the water wheel , the cogwheel (see also antikythera mechanism ), the spinning wheel , and the astrolabe or torquetum .
BBS continues to produce one-, two-, and three-piece forged wheels out of aluminum and magnesium alloys, as well as high performance flow-formed wheels and low-pressure cast wheels. [20] BBS also actively uses specialized quality and weight optimization methods, such as CNC back-milled spokes , x-ray inspection , FEM analysis, flow-forming ...
The performance of a wheel depends on the alloy and technique used to construct it. [1] A wheel is usually made up of a rim, which connects with the tire, and a central disc, also known as the disc or spider, which connects the wheel to the vehicle. [2] Wheels are usually of two types: semi-drop center (SDC), used in trucks, and drop center (DC ...
However, those magnesium wheels proved to be impractical because they were prone to corrosion and they were mostly used in racing sports. After 1960's magnesium wheels were gradually replaced by aluminium alloy wheels on the mass market, but not from the competition wheels market. Many manufacturers of magnesium wheels are still operating.
The CB400T, for example, used steel for the spokes and alloy for the rim, whilst the CBX and the Super Dream used alloy for both the spokes and rims to further reduce unsprung mass. For the NR500 , the wheels were made from magnesium, with titanium used for the fasteners.
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