boot. Softtop A convertible top which is made out of flexible materials like PVC or textile. Spats Side covers for wheel arches, hiding the wheel—usually rear only. Also called fender skirts. Spoiler A raised lip or wing which is used to "spoil" unfavorable air movement across the body. Some designs are more functional than others. Staggered wheel fitment The front and rear wheels are different widths. On sporty rear-wheel-drive cars, the rear tires are usually wider than the front. Strake Crease in the sheet metal intended as a "speed line" styling feature. Exemplified in the doors of the Ferrari Testarossa. Suicide door Side doors hinged at the rear of the car with the latch at the front of the car. If accidentally opened while driving at a high speed, such doors would be blown backward. Swage line Crease or curvature in the side of the body used to create visual distinction. Sometimes the crease is functional and improves rigidity of the outer body (interchangeable with character line). Swan doors Swan doors operate in a similar way to conventional car doors but unlike regular doors, they open at an upward angle. These help to prevent the bottom edges of doors on low cars from scraping on curbs. Common on Aston Martin cars. Swedish kiss A negative flick-out to a flat surface which frames trim sections or venting. T Track The distance across the car between the base of the left and right wheels (like wheelbase, but side-to-side). Truck A typically large vehicle built using frame-on-rail construction consisting of a cab and a separate bed for cargo. Trunk (Boot in UK) Compartment for storage of cargo which is separate from the cab. Tube Fender Replacement fenders found on off-road vehicles designed as part of body armor for off-road vehicles. Used to protect the thin sheet metal bodies from damage while off-roading. Tumblehome Generally refers to the way the sides of a car rounds inward toward the roof, specifically of the greenhouse above the beltline. This term is borrowed from nautical description of naval vessels. Turn under The shape of the rocker panel as it curves inward at the lower edge. W Wedge Shape of the car as seen in the side profile. May be positive, negative or neutral. If the front is lower than the rear, then it is wedge-positive. If the rear is lower it is wedge-negative. If the car appears