Abstract: A dolly trailer adapted to transport heavy elongated cylindrical objects such as towers used to support energy generating windmills. The dolly trailer comprises a first side rail member and a second side rail member with a plurality of curved support members therebetween adapted to receive the cylindrical load. The curvature of the support members is such that at least a portion of the curved support members extends below the plane created by top surface of the dolly trailer's first and second side rail members so that in use at least a portion of the cylindrical load is carried below this plane.