Home - Trailers - Trombones - Drop Frame Extendable Trombone Trailer Drop Frame Extendable Trombone Trailer Dennison’s Drop Frame Extendable Trombone Trailer comes fitted with a highly durable keruing hardwood floor as standard, not to mention a self-track rear axle, deck lashing rings and variation of rear ramp. Key features include: Extends to 19.7m with 1500mm intervals 29mm Keruing hardwood floor as standard 235/75r 17.5 tyre size – offering bottom deck height of 920mm FEATURE AND BENEFIT SUMMARY Short beaver tail including ramp bar – detachable aluminium ramps (optional) for rear loading of plant and machinery Floating centre section – can be moved to any position of the open section for extra load support Deck lashing rings and post sockets – positioned equally along the desk for the safe securing of loads Air operated locking pins – trailer can be opened depending on length of load with locking blocks every 1,500 mm; pins can be operated via a push/pull button or a secondary C coupling at the front of the trailer Self-track rear axle – for better manoeuvrability when trailer is extended