Aspen’s P-Series (Petroleum Series) folding gooseneck trailers are designed for hauling skid mounted loads which primarily serve the Energy (Oilfield) industry and are suitable for both on road and off road applications. Configurations vary from payloads of 40 tons through 70 ton capacities, with axle configurations ranging from 8 through 13 axles (including truck axles). Aspen P-Series trailers feature folding goosenecks with single drop and tail roll frames. P-Series trailers can be configured with various deck widths, lengths and styles (flush deck, extendable) including custom options. The P-Series trailers have common air/regulated air suspensions with transporter equalization achieved by combinations of jeeps & boosters with common air/regulated air suspensions. Aspen’s P-Series of trailers are available in specific regional configurations (Interstate – US and Canada) to maximize trailer configurations for specific regional regulations. Common Aspen configurations include 3, 4 and 5 axle configurations with both tail rolls and flip over tail rolls.