The Bogen Cine/Video Dolly is designed for use with the Universal and Heavy Duty tripods. Individually braked 5" wheels with cable guards and a unique leg locking system make it extremely stable. And it's easy to assemble and disassemble for transporting. The tripod legs are captured in a 38" diameter circle and the doorway clearance needed for the fully assembled dolly is only 39.5". Model 3198 is designed for tripods with spiked feet including model 3192, 525MVB and 542ART.