When a load is heavier than the rules allow, weight gets spread across more axles. Jeeps, boosters, and multi-axle configurations turn an RGN or lowboy into a superload rig that keeps the heaviest freight legal.
Quick answer: Multi-axle transport adds axles — jeeps ahead of the trailer and boosters behind — to spread the weight of superloads across more tires and stay within per-axle limits. It's how transformers, vessels, and the heaviest machinery move legally.
Every road and bridge has a per-axle weight limit. When a load's total weight would overload a standard trailer's axles, we add them: a "jeep" between the tractor and trailer, "boosters" behind, and extra rows under the deck. Spreading the weight keeps every axle legal even when the total climbs into the hundreds of thousands of pounds.
These are superloads — moves that exceed standard oversize/overweight limits and demand engineered routing, bridge analysis, and often police escorts and utility coordination. We build the axle configuration to the load and the route, working from an RGN or lowboy base.
Extreme-weight electrical units
Heavy industrial process equipment
Freight beyond standard overweight limits
The heaviest welded and cast structures
A superload exceeds standard oversize/overweight limits. Multi-axle transport adds jeeps and boosters to distribute the weight across more axles so the load stays within per-axle limits and moves legally.
With enough axles, well past 200,000 lb. The exact configuration depends on the load weight, its footprint, and the axle limits along the route.
Engineered routing and bridge analysis, state superload permits, and usually police escorts and utility coordination. We manage the whole package.
As early as possible — superload permits and route approvals take time. Send weight and dimensions and we'll start the routing.
Related field guide: How to Ship a Generator →
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