Aspen’s M-Series (Mining Series) removable neck trailers are designed for mobile (self-propelled) mining equipment or crane loaded payloads which primarily serve the mining industry and are for off road, extreme duty applications. Configurations vary from payloads of 100 tons through 300 ton capacities, with axle configurations ranging from 3 through 5 axles (including truck axles). Aspen M-Series trailers feature removable necks with double drop decks with both square tail and beaver tail rear frames. The M-Series trailers have 4 wheels across per line and 8 wheels across per line, walking beam “trunnion” suspensions. Aspen’s M-Series are designed to interface with a customer’s specific prime mover (tractor).