Manitowoc again introduces a new innovative mobile crane concept named GSK 55. The upperstructure already is known from its AT-version, the GMK 3055, fitted with 43 meters of telescopic boom and a double folding jib with 8,7 and 15 meters of lenght as option. The special idea about the GSK 55 is its carrier, as it is a specially designed 3-axle trailer-chassis. For moving the crane this chassis can be combined with a common prime mover that usually is available in every truckfleet.