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Sep 5, 11:10 am ET
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Suspension Tethering
 SuspensionA car is suspended off the ground by a complex set of A-arms, springs, shocks and anti-roll bars that connect the chassis to the four tires. How these components interact is crucial to good handling. As seen in this image, Champ Cars ride very close to the ground. Champ cars have a double wishbone style suspension that allow for little vertical movement. Because the ride height is only two or three inches from the ground, engineers do not want to be scraping the bottom of the car along a bumpy course from a springy suspension system. Riding in a Champ Car is far from a luxurious drive. The suspension system is designed to be stiff, strong and very responsive to the driver. Wheel Tethers Suspension tethers are braided KevlarŪ double straps bolted to the wheel and chassis. These wheel tethers bind wheels to open-wheel cars. They prevent wheels from flying away from a car upon impact, protecting drivers and spectators. Suspension tethers may be enclosed in a protective fairing or fed through the suspension tubing (as shown in the diagram on the lower A-Arm). |
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| Paul Laguette Illustration Copyright RACER Magazine | ||||||||||||
 A-ArmsA component of suspension, these metal rods connect the tires and wheels to the chassis. They are usually shaped like an "A", with the point of the A connected to the wheel and the bottom two points of the A connected to the chassis. There are usually two A-arms at each wheel, one top (Upper Control Arm) and bottom (Lower Control Arm). Also called wishbones - hence the "double wishbone style suspension". |
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