Hotwheels Metal Car

Hot Wheels is a brand of die cast toy car, introduced by American toymaker Mattel in 1968. It was the primary competitor of Matchbox until 1996, when Mattel acquired rights to the Matchbox brand from Tyco.

There were sixteen castings released in 1968, eleven of them designed by Harry Bentley Bradley, with the first one produced being a dark blue Custom Camaro. Although Bradley was from the car industry, he had not designed the fully functional versions of the real cars, except the Dodge Deora concept car, which had been built by Mike and Larry Alexander. Another of his notable designs was the Custom Fleetside, which was based on his own heavily customized '64 El Camino. (Other info...It is more likely that Bradley's heavily customized hot rod was a 67 Chevrolet Pickup Truck...not the 64 El Camino.) Matchbox cars are more city or "real life" cars, while Hot Wheels are more "tricked out" cars.

Of the first 16 cars (sometimes called the "Sweet 16" by collectors), 10 were based upon customized versions of regular production automobiles of the era, and 6 were based upon real show cars and cars designed and built for track racing. All of the cars featured "Spectraflame" paintwork, bearings, redline wheels, and working suspension.
There was one notable difference in the first run production cars and that was a lack of "Door Cuts" in the molded cars. This was thought to be more accurate to the scale as door openings would be nearly invisible at that scale. Also, the sharp edges of the cuts in the molds would quickly wear away from the process of injection. Later they were brought back due to public opinion and toy testing on children.
The metallic "Spectraflame" paintwork also marked out these models from drab enamel of Matchbox cars. The attractive finishes were achieved by firstly polishing the bare metal of the bodyshells and then coating them in a clear colored lacquer, and featured such exotic colors as "Antifreeze", 'Magenta' and "Hot Pink". Because "Hot Pink" was considered a "girls color", it was not used very much on Hot Wheels cars. For most castings, it is the hardest color to find, and today can command prices ten times as high as more common colors.
In order for the cars to go fast on the plastic track, Mattel chose a cheap, durable, low-friction plastic called Delrin to use as a white bushing between the axle and wheel. The result was cars that could go up to scale 200 mph. The bushings were phased out in 1970, and replaced with flush black inner wheels with outer caps. The early years of Hot Wheels are known as the Redline Era as until 1977 the wheels had a red line etched around the tire rim, popular on muscle cars at the time.
The "Torsion Bar" suspension was simple, but flawed. Inside the car, the axles followed a "C"-like shape that was connected to the chassis. When pushed down, the axles would bend like a real car. However the axles were hard to install on the chassis while being assembled and would become detached from the lugs on the baseplate if very hard pressure was applied. Well played with cars would develop an obvious "sag" to the wheels. The suspension was redesigned in 1970 with solid axles mounted on a bar of plastic acting as a spring. Packaged along with the cars were metal badges showing an image of the car so fellow collectors could identify each other and compare collections.
Most importantly, they were designed to run on orange plastic track, which could be placed to make interesting jumps and loops. Motive power was by means of gravity, by attaching the starting point of a course to a table or chair via an included plastic C clamp. A two-lane starting gate was available, allowing two lengths of track to be set up for racing. Later sets had both the starting gate and a finishing flag which would be tripped by the first car. One of the most famous sets was the 1970 Mongoose & Snake Drag Race Set, which reached values as high as $500 during the 1990s, but has since been produced in modified replica form. It featured yellow Plymouth Barracuda and red Plymouth Duster funny cars, loops, jumps, and even an apparatus that would deploy drag chutes after they crossed the finish line, all in a box showing Don Prudhomme and Tom McEwen.
Other sets included a Supercharger that had an electric motor and foam covered wheels that propelled the car around a loop of track as the cars passed through. Accessories included a lap counter and a speedometer. It was the combination of all of these ingredients — speed via the low-friction wheel/axle assembly and racing tires, looks due to Spectraflame paint and mag wheels, plus the inclusion of very American themes such as hot-rod designs based on true American prototypes not seen in great numbers in the competition's product lines — that laid the groundwork for the incredible success story Hot Wheels were to become.