The Grove RT855B is a 55-ton US capacity Rough Terrain Crane with 37' - 115' of main boom and 35' - 60' of offsettable jib side stowed jib extension., The crane is powered by a 250 HP six cylinder Cummins 6CTA 8.3 diesel engine. With a maximum travel speed of 25 MPH (40 kph) this crane is ideal for working on many job sites.