Jackknife B-doubles allow both trailers to be tipped without unhooking. The 5th wheel is located under the rear of the A-trailer body, which pivots on a reinforced cantilever. The lead trailer can be tipped over the front of the B-trailer chassis, or the rear trailer can be jack-knifed to one side so the A-trailer can be reversed into a bay or a heap. Even if the B-trailer needs to be unhooked, the A-trailer can be tipped over the rear of the chassis without having to roll the body or slide the suspension.
Triaxle Jackknife B-Double – Grain
Tri-tri Jackknife B-Double combination, with 1600mm & 1900mm sides. A-trailer has air lift tailgate; both trailers are fitted with Road Train crossmembers.
Triaxle Jackknife B-Double - Quarry
Tri-tri Jackknife B-Double combination, with 1200 & 1500mm sides. Features York axles & suspensions, & electric Retractable Tarps; both trailers fitted with liftable front axles.
Triaxle Jackknife B-Double - Grain
Tri-tri Jackknife B-Double combination, with 1500 & 1800mm sides. Features York axles & suspensions with liftable front axles, & roll-over tarps; A-trailer fitted with Road Train crossmember.