When you’re hauling for a living, every trip costs money.
Fuel, driver time, wear on the truck and equipment, and the hours available in a working day all factor into what it costs to move material.
So if you’re regularly hauling gravel, aggregate, sand or other bulk material, there’s a pretty simple question worth asking:
Can I get more out of the truck I already have?
For the right operation, that’s where a tridem pony pup can make a lot of sense.
Hayworth has five new 2026 Loadline GRPP-17 tridem pony pups on order and headed for our yard in Acheson. Before they arrive, we thought we’d spend some time explaining what a pup actually brings to an operation – and what you should be looking at when deciding if one is right for you.
First Things First: What Is a Pony Pup?
A pony pup is a trailer designed to be pulled behind a straight truck, giving the truck additional hauling capacity without adding another power unit.
In the case of the Loadline pups coming to Hayworth, we’re talking about a tridem configuration – three trailer axles – with a 17-foot dump body and 16.6 cubic yards of volume. The complete trailer is 31’3″ long and 8’6″ wide.
The idea behind a pup is fairly straightforward.
You’re already sending the truck, driver and load down the road. A properly configured pup gives that truck the ability to carry additional material behind it.
For an operation moving a lot of material over the course of a day, those additional yards can add up.
Get More Out of the Truck You Already Have
This is really the main reason haulers run pups.
Adding hauling capacity doesn’t necessarily mean putting another truck and another driver on the road.
If a truck-and-pup combination allows you to move more material per trip, you may be able to reduce the number of trips required to move the same amount of material. That can mean better use of your truck, your driver’s time and the fuel you’re already burning.
There’s a cost-per-ton conversation here too.
Every trip has operating costs attached to it. If you can efficiently spread those costs over more material, it can change the economics of the job.
That doesn’t mean adding a pup automatically makes every operation more profitable. Distance, material, loading, unloading, truck configuration, legal weights and the type of work you’re doing all matter.
But if your trucks spend their days hauling material, it’s worth doing the math.
A Pup Still Has to Work Where You’re Working
Capacity is only useful if you can get the equipment where it needs to go.
That’s part of what makes pony pups useful for aggregate haulers, excavation contractors, road builders and other operations working in and around construction sites.
You’re adding another trailer behind the truck, so naturally the combination changes how the unit handles and maneuvers. That’s something an operator needs to account for.
But compared with moving the same amount of material using another complete truck and driver, a pup gives an operation another way to add hauling capacity using equipment it already has.
And in Alberta, that can mean everything from aggregate pits and road construction to municipal work, excavation and oilfield applications.
Not All Pups Are Built the Same
This is where we’d rather talk about actual equipment than make general claims.
The five Loadline pups we have coming are GRPP-17 tridem pony pups, and there are several details in their build that stand out.
The dump body is an all-steel unibody Kleene-side design with an AR-200 steel floor. Loadline also mounts the hoist outside the body, which is designed to improve material clean-out. The sides use formed carbon-steel panels, a tubular top beam and a replaceable inner liner.
Those aren’t particularly glamorous features – and that’s kind of the point.
On a dump trailer, you want material to come out, you want the body to stand up to the work, and you want wear items to be serviceable.
The trailers use a Nordic four-stage telescopic hoist with a single-line, power-up/gravity-down hydraulic system.
Underneath, they’re equipped with three Ridewell RAR260 25,000-lb air-ride suspensions and three 25,000-lb axles, along with an electric/manual air-dump system and liquid-filled weigh gauge.
It’s important to make a distinction here: component ratings are not the same thing as the amount you’re legally allowed to put on the trailer.
Alberta’s allowable axle and gross weights depend on the complete truck-and-trailer configuration, axle spacing, tire specifications and other requirements. That’s one reason we want to know what you’re pulling the pup with before talking about what a setup can do for you.
A Few Details That Matter Once You Start Using It
Some trailer features don’t sound particularly exciting on a spec sheet, but you appreciate them once the equipment is working every day.
These Loadlines have an adjustable tailgate trip mechanism, reinforced spreader-chain slots and greaseable hardened tailgate hinge pins. There’s also a narrow paver-style bumper.
They’re fitted with a Michels Dura-Flip load cover, full mudflap package, Truck-Lite electrical components and LED lighting.
The trailers are sandblasted, epoxy primed and finished with Axalta urethane paint. Loadline also provides a five-year prorated warranty on structural components it builds and a one-year warranty on its non-structural components.
Again, none of this changes the basic reason you’d buy a pup.
It has to help you move material and keep doing it.
What About Weight?
This is probably one of the most important conversations to have before adding a pup.
Three 25,000-lb axles underneath a trailer do not mean you simply have 75,000 lb of legal payload available.
Alberta regulates truck-and-pony combinations based on axle groups, axle spacing, tire capacity and the overall vehicle combination. Operators are responsible for confirming that their complete configuration complies with applicable regulations.
So rather than throwing out a payload number that may not apply to your truck, we’d rather look at the actual combination.
What truck are you running? How is it configured? What are you hauling? Where are you running it?
Those are the questions that matter.
Does a Tridem Pup Make Sense for Your Operation?
Maybe.
And we mean that sincerely.
If you’re regularly moving bulk material and looking for ways to get more productivity out of a truck you’re already running, a pup is certainly worth considering.
But equipment has to fit the job.
A customer hauling aggregate every day has different needs than somebody who occasionally needs additional capacity. The truck you already own matters. The routes you run matter. Your loading and unloading conditions matter.
That’s why we’d rather have the conversation than simply tell everybody they need a pup.
Five New Loadline Tridem Pups Are Headed to Hayworth
We currently have five new 2026 Loadline GRPP-17 tridem pony pups on order, with arrival at our Acheson yard coming soon.
They’re 17-foot, 16.6-cu.-yd. steel pups with tridem Ridewell air ride, AR-200 floors, Nordic telescopic hoists and Michels Dura-Flip load covers. The incoming units are currently listed at $69,990, excluding applicable taxes, levies and fees.
If you’ve been thinking about adding a pup – or you’re not sure whether one makes sense for your truck – come talk to us.
Tell us what you’re hauling, what you’re pulling it with and where you’re working.
We’ll help you figure out whether a pup makes sense for your operation and what kind of setup you should be looking for.
Internal review note: Technical specifications are based on the 2026 Loadline GRPP-17 quote/specification sheets supplied by Hayworth. Alberta legal weights depend on the complete vehicle configuration and applicable regulations; confirm regulatory details before publication.