2026 Load King Flips/Converter Dollies/Jeeps Trailers For Sale

Load King flips, converter dollies, and jeeps are modular heavy haul components designed to add axle capacity, improve bridge compliance, and match a trailer to a specific load and permit requirement. In this category, buyers are usually focused on flip axles for lowboy and detachable gooseneck applications, where the right configuration can make the difference between a legal load and an expensive routing problem. Common decisions start with ton rating, overall width, axle spacing, and how the attachment is intended to work with a specific Load King platform such as a 55-ton or 60-ton trailer.

Flip axles are often selected by suspension type and axle package as much as by capacity. Listings in this class commonly show single 27,500-lb axle setups, air ride or Hendrickson air ride suspension, and 255/70R22.5 or 275/70R22.5 rubber on outside aluminum wheels. Width matters because many fleets are matching an 8 ft 6 in trailer or a 9 ft wide deck system, and axle spacing such as 54.5 inches or 60 inches can affect fitment, weight distribution, and permit strategy. Intermediate flip axles are also used when the trailer architecture calls for a specific mounting location or support arrangement, and options like independent leveling valves, suspension isolation kits, D-rings, and upgraded lighting packages can matter in day-to-day operation.

Converter dollies and jeeps serve a similar purpose in modular heavy haul, but with different roles in the combination. A jeep is typically installed between the tractor and the trailer to shift kingpin weight and spread the load across more axles, while a converter dolly is commonly used to connect and support an additional trailer section or axle group. Buyers should verify kingpin setting, drawbar configuration, brake and electrical compatibility, ride height, and connection points before assuming interchangeability across brands or even across trailer series from the same manufacturer. On specialized hauling setups, a mismatch in coupler height, axle track, or suspension geometry can create handling issues and complicate permitting.

For Load King equipment, the real buying question is not just capacity on paper. It is how well the component integrates with the intended trailer, load profile, and operating region. A buyer running concentrated construction equipment or transformers needs to think about bridge formula, state-by-state axle rules, tire size consistency, serviceability of suspension components, and how quickly the crew can pin on or remove the axle group in the field. Well-matched flips, jeeps, and dollies add flexibility to a heavy haul fleet, but only when the dimensions, connection hardware, and rated use line up with the trailer they are built to support.