Aspen’s W-Series (Wind Series) are wind tower section hauling trailers which serve the wind energy industry. Configurations vary from payloads of 35 tons through 85 ton capacities, with axle configurations ranging from 7 through 13 axles (including truck axles). Aspen W-Series transporters feature front and rear Schnabel necks or front Schnabel with a rear saddle mounted on another type of hauling unit. W-Series trailers have common air/regulated air suspensions or walking beam (trunnion) suspensions with transporter equalization achieved by a mechanical equalizing steerable dolly or a 3 axle rear dolly equipped with a saddle.