ADAPTABLE WHEELBASE SELF-POWERED DOLLY VEHICLE UNIT

A self-powered dolly vehicle unit with an adaptable wheelbase, the dolly vehicle unit comprising a front axle arranged to support a pair of steerable front wheels, a rear axle arranged to support a pair of rear wheels, a fifth wheel connection for towing a trailer vehicle, a draw-bar attachment mechanism , arranged to hold a draw-bar, and a frame structure arranged to support the front axle and the rear axle at a variable wheelbase distance from each other, wherein the frame structure is arranged to be locked at a first wheelbase distance position and at a second wheelbase distance position.