Power-Only & Trailer Types: A Carrier's Guide

The tractor is the expensive, complicated, regulated asset. The trailer is a box on wheels — but it costs real money, needs maintenance and registration, and sits empty a lot. Power-only is the arrangement where you supply the tractor and driver, and someone else supplies the trailer. For a carrier with limited capital, it's one of the cleanest ways into freight.

What power-only means

You pull a trailer you don't own — typically a broker's, shipper's, or a trailer-pool provider's. You provide the power unit, the driver, the authority, and the insurance. The freight is already loaded (or you load at the dock), and you hook, haul, and drop.

How power-only works

• Drop-and-hook is the norm: you arrive, drop the empty (or the loaded trailer at destination), hook the next one, and go. Less time at the dock than live-load/live-unload.
• Trailer interchange matters. When you pull someone else's trailer, you generally need trailer interchange coverage — insurance for damage to a trailer you don't own but are responsible for. Confirm this before you accept the load; your standard policy may not include it.
• Inspect before you hook. You're driving it, so its lights, tires, brakes, and load securement become your roadside violation. Document pre-existing damage with photos before you leave.

The economics: pros and cons

In favor: no trailer purchase, no trailer registration or maintenance, no empty trailer depreciating in a yard. Drop-and-hook means more driving hours and less time burning your 14-hour clock at a dock. It's the lowest-capital way to put a tractor to work.

Against: power-only linehaul rates typically sit below what you'd earn pulling your own van on the same lane — you're supplying less of the asset. You're dependent on the trailer provider's network and pool availability, and repositioning to find the next trailer can create deadhead. You also inherit whatever condition their equipment is in.

Ashton charges 6% for power-only versus 4% for semi — the work per load is different, and so is the fee. Run the comparison on your own numbers: a slightly lower rate with materially higher utilization and no trailer note can beat a higher rate with an idle asset.

The trailer types, plainly

• Dry van — the enclosed 53' standard. Most freight, most competition, most commoditized. The baseline everything else is compared to.
• Reefer (refrigerated) — temperature-controlled. Higher rates, higher risk, real documentation burden. See our reefer guide.
• Flatbed — open deck for steel, lumber, machinery, building materials. Pays well; requires tarping, strapping, chains, and real securement skill. Physically demanding, weather-exposed. Tends to move on a different cycle than dry van, which can smooth your year.
• Step deck (drop deck) — a flatbed with a lower main deck, allowing taller loads without a permit. A common step up from flatbed.
• RGN / lowboy — removable gooseneck for very tall, heavy equipment. Specialized, permit-heavy, high rates, high barrier to entry.
• Box truck — straight truck, often under CDL weight thresholds, common for last-mile and expedited. Ashton dispatches these at 8%.
• Hotshot — typically a heavy-duty pickup pulling a gooseneck. Low entry cost, expedited and smaller loads, tight margins. Also 8% at Ashton, because the loads are smaller and the touches are more frequent.
• Tanker / hazmat / conestoga / curtainside — specialized niches with endorsements, extra insurance, and higher pay for those who commit.

Choosing your equipment

The honest test isn't which pays most per mile — it's which pays most per year given your capital, your skill, your body, and your lanes. Flatbed pays more than dry van but you'll be tarping in February. Reefer pays more but one undocumented claim erases the delta. Power-only pays less per load but you never own a trailer note. Every equipment choice buys a rate premium by selling something else — capital, effort, or risk. Know which one you're selling.

How Ashton helps

Ashton dispatches all of it — dry van, reefer, flatbed, step deck, power-only, box truck, and hotshot — and our fees reflect the equipment: 4% semi, 6% power-only, 8% box and hotshot, collected only after you're paid. We also offer trailer rental if you'd rather control your own equipment. We'll help you compare the real per-year economics of each before you buy anything. You keep your authority and approve every load.