It has a solid aluminum chassis and an adjustable polymer stock. Duo 1U 19-inch rack-mountable chassis. Below are vehicles manufactured in chassis cab configuration only. The RX was built on a unibody chassis. Early buses were merely a bus body fitted to a truck chassis. The prototype chassis was stiffer and heavier than the Miura chassis. Wallace made extensive modifications to the standard Miura chassis and engine. The WS-2 uses a heavier 8X8 Taian TA580/TAS5380 truck chassis. All teams use a spec Dallara IR18 chassis with and Firestone tires. A computer has a certain resistance to air flowing through the chassis and components. Honda developed an install kit around the Swift DB-1 chassis. Many are derived from existing truck chassis. Its earliest form consisted of a motorised ironside chassis fitted with firing ports. The car specifications are similar to those of a Cinque with the new carbon-titanium chassis. The biggest performance gains come from the 2015 redesigned chassis.