New Flips/Converter Dollies/Jeeps Trailers For Sale

Flips, converter dollies, and jeeps are specialized heavy haul trailer attachments used to spread load weight, improve bridge compliance, and match a trailer setup to permit requirements. Buyers typically shop these components by exact compatibility first, not brand alone. Axle spacing, deck or trailer fitment, suspension type, brake configuration, ride height, and connection style all matter because these units must work as part of a complete lowboy, beam, rail, or specialized hauling combination. A new unit is often chosen when a fleet needs current spec compliance, clean structural life, and the ability to match a trailer’s dimensions and capacity without rebuilding older running gear.

Flip axles are commonly added to the rear of a lowboy or specialized trailer to increase legal payload and distribute weight across more axles. In this category, common specs include single-axle configurations, steel construction, drum brakes, air ride suspension, and 255/70R22.5 tires with steel inner and aluminum outer wheels. Axle spacing is a key buying point, with common dimensions such as 54 or 54.5 inches affecting bridge law calculations and how the axle integrates with the rear frame. Details like D-rings, limit chains, stake pockets for wide load signs, flag holders, strobe light wiring, and leveling valves are not minor add-ons. They directly affect day-to-day oversize operation, securement flexibility, and how quickly a driver can put the trailer into permitted service.

A jeep, also called a booster jeep or lowboy jeep depending on application, is installed between the tractor and trailer to shift kingpin weight and create a longer axle group. This is important when a load is too heavy on the steer or drives, or when state permit rules require a different axle spread. Converter dollies serve a different purpose, typically adding an axle group and tow point between units, but the same buying principle applies: geometry and air-brake integration have to match the intended combination. Buyers should confirm kingpin setting, fifth wheel height, drawbar length, suspension travel, brake timing, ABS provisions, and tire and wheel spec across the whole setup. A mismatch in one of those areas can create loading issues, turning limitations, or permit problems that cost more than the initial purchase price.

For new equipment, pay attention to how the unit is spec'd for the exact trailer series and rated capacity you run. A flip axle built for an 8-foot-6-inch 55-ton trailer is a different tool than one built for a rail trailer or a heavier multi-axle platform. Structural design, neck or tail compatibility, brake package, and suspension brand all affect service life and maintenance support. The best buying decision usually comes from starting with your current trailer model, target gross load, and the states you run most often, then matching the attachment to those requirements. In this category, precision matters more than general capacity claims because these components only perform correctly when the entire combination is engineered to work together.