Most high-volume manufacturers offer heavy duty chassis versions of certain tractor units which enable a ballast box to be fitted.

Sutphen's heavy duty chassis series are the Ambassador, Imperial, Monarch, and "S" Series.

Heavy duty chassis dynamometer (HEV and PHEV test bed with 2 independently controlled rolls capable of 1000 hp each)

OSU CAR offers services using the heavy duty chassis dynamometer, a light duty dynamometer, battery testing, high voltage testing, concept design services, and more.

The Snatch is based on the Land Rover Heavy Duty Chassis, a militarised version of the Defender 110 (similar to the Land Rover Wolf).