Lift Axle Position

I’ve been messing around more with running over 80,000 up here in Minnesota, and figured I’d share a few things we’ve learned so far. Our overweight laws are pretty restrictive, so it’s not as straightforward as just adding an axle and hauling more.

First question — is it even worth it?

On paper it sounds great, but when you actually break it down, the numbers get tighter than you’d think.

If you’re already running 85,500 and bump up to 90,000, you’re only gaining about 4,500 lbs. After you factor in the extra weight of the axle (figure ~1,500 lbs), you’re really netting around 3,000 lbs… about 1.5 tons.

At $250/ton, that’s roughly $375 extra per week if you can use it on every load. The problem is—you won’t. And when you can’t, that extra axle is just dead weight costing you payload.

We figured you’ve got to be able to use that axle on at least ~40% of your loads just to break even, and that’s before maintenance.

Not everything can (or will) load heavy

Big one we learned the hard way—you can’t assume just because you can haul it, someone will load it.

In Minnesota, some commodities qualify, some don’t. On top of that, certain counties and routes won’t allow it, and some shippers just won’t mess with overweight at all.

So now you’ve got equipment built for something you can’t always use.

Pusher vs trailer axle

We’ve tried both approaches:

• Pusher on the truck – probably the most efficient way to add capacity weight-wise. Downside is you’re stuck hauling that extra 1,200 lbs everywhere, even when you can’t use it.
• Adding an axle to the trailer (tridem) – heavier overall, and you’re usually adding length too. Works fine if trailers stay put, but if you’re like us and swap trailers a lot, durability becomes a concern. We went steel subframes for that reason.

Bridge law will bite you

This is where a lot of setups fall apart.

Trying to make bridge with shorter trailers + pushers can be a headache. Even when it should work, you end up fighting axle weights depending on how it gets loaded—and we all know most loaders aren’t thinking about how you want it balanced.

Dispatch gets more complicated

Once you start mixing equipment, you’ve got to stay on top of it.

We’re now running:

• Tridem hoppers for heavy lanes
• Tandems for states that don’t recognize it
• Trucks with and without pushers

It works, but dispatch has to be intentional or you’re leaving money on the table.

Don’t forget what else you haul

This was a big one for us.

We run liquid too, and in Minnesota you can’t go over 80,000 with it. So now you’ve got trucks with pushers that are actually hurting you on those loads because of the extra tare weight.

My take

If you’re already at 85,500, I don’t think jumping to 90,000 is a slam dunk.

If you’ve got dedicated lanes where you can use it all the time, then yeah—it can make sense.

But if you’re bouncing around like most of us, it adds complexity, cost, and weight that you’re not always getting paid for.

Honestly, being really intentional with specs and where you run might get you just as far without adding axles.

Curious what others are seeing in states that are a little more friendly on overweight.