1. How I got there
Let me back up.
I'd been saving for a toy hauler. That's an RV with a garage in the back. The back wall folds down into a ramp, and you drive your toys right inside. My toy is a side-by-side, an off-road buggy where two people sit next to each other. I call it the reason I don't have savings.
The one I wanted was a fifth wheel, the big kind that hitches up inside the truck bed. My TRX is built to fly over desert whoops, not to carry a house. Which meant I needed another truck. A serious one.
I already had the whole rig drawn and taped to my fridge. Truck, trailer, side-by-side, desert sunset. I drew the back fenders wide. I didn't know why. They just looked right.
I already had a dually on order. And now a guy with a cartoon possum on his bumper had just proven I had no idea why.
2. The education
I met my buddy Earl at the boat ramp. Fifteen years of duallies, and these days it's a 2019 F-350. I told him what happened.
"What'd you tell him?"
"Nothing. I shrugged."
Long pause. "Saturday. Seven a.m. I'm driving."
Before we left his driveway, Earl opened the glovebox for his sunglasses, and I counted. Two flashlights, each with spare batteries taped to the side. Two pocketknives. Two rolls of electrical tape. Zip ties in the glovebox, the door pocket and the visor. He was wearing a belt. And suspenders.
"You only need one of those," I said.
"One is none," Earl said. "Two is one."
"What's three?"
"Three is Tuesday."
Ten minutes out of town, Earl eased onto the shoulder and flipped on his hazards before I'd even seen why. A turtle, mid-lane, crossing a two-lane road like he was paid by the hour. I'm an animal lover. I was out of that truck before it stopped rocking.
I've since checked how to do this right, because I want you to do it right too. Only help if you can pull over safely and traffic is light. Hazards on. Carry the turtle across in the same direction it was already headed, or it'll just try again. Never pick one up by the tail. If it's a snapping turtle, nudge it from behind with a floor mat or a branch and keep your fingers to yourself.
Mine was a little guy with a yellow-streaked face and somewhere to be. I named him Lugnut. When I climbed back in, I noticed Earl had watched traffic in the mirrors the whole time. Backup.
From there, Earl drove us to an RV park on the lake. Duallies. Rows of them. Hitched to fifth wheels the size of my apartment, pontoon boats, horse trailers, toy haulers with dirt bikes peeking out the back.
"Count how many of these folks haul for a living," Earl said.
I walked the loop. A retired couple from Arizona. A family with three kids and two jet skis. A dentist. A dentist! The only work truck in the park belonged to the guy who pumps the septic tanks.
"Some folks buy duallies to make a paycheck," Earl said. "These folks buy them to sleep at night."
That's where I met Hank and Marge. Hank had a laminated pre-trip checklist clipped to his visor. Marge showed me the second laminated checklist, in the trailer, in case the first one blew out the window.
"Has it ever blown out the window?"
"No," Hank said. "That's how I know it's working."
He carries spare fuses, and spares for the spare fuses. Marge rolled her eyes so hard I heard it. "A backup for a backup for a backup. Forty-one years of marriage. I'm pretty sure I'm the third backup."
"You're the first," Hank said, without looking up. It landed.
"We tow maybe eight weekends a year," Hank told me. "I want every single one of them to be boring."
And there it was. These people carry two of everything. Of course they want two tires on each corner of the back axle. The truck is just built the way they already think.
3. The real lesson
Earl leaned on the tailgate and gave me the real lesson.
A dually is a pickup with dual rear wheels, written DRW. A regular pickup is SRW, single rear wheel: one tire on each side of the back axle. A dually runs two on each side. Four in back, two up front. Six.
Fifth wheel and gooseneck hitches both mount in the bed, right over the rear axle. A fifth wheel uses a heavy plate with locking jaws that grab a pin on the trailer, like a semi. A gooseneck uses a big ball, and the trailer's coupler drops down over it. Either way, a real chunk of that trailer's loaded weight sits on your truck. That chunk is called pin weight.
Four rear tires share that weight instead of two. The highest towing and payload ratings in a heavy-duty lineup come on the dually versions. And with the tires spread wider under the back, a dually feels more planted with a heavy trailer behind it.
Then Earl's favorite part. If a rear tire blows, its partner is still right there holding that corner up while you ease off the gas, keep the wheel steady and get to the shoulder. That's a backup, not a spare. That partner is now carrying a load meant for two, so you don't keep driving on it. You pull over.
"And here's the honest part," Earl said. "You don't automatically need a dually to pull a fifth wheel. Plenty of them are a fine match for a single-rear-wheel truck. Do the math: what the trailer weighs loaded, how much sits on the hitch, and whether your truck's ratings can carry it with your people and gear on board. Pin weight can use up your payload before the trailer ever hits the tow rating."
"The numbers pick the truck," he said. "Not the fenders."
"The fenders get a vote."
"The fenders vote last."
I asked about the five little amber lights on his roof. "Width," Earl said. Federal lighting rules say once a vehicle is 80 inches wide or more, it needs clearance lights to show its width, plus three identification lights near the top center. A dually's back fenders put it past that line.
"Like a crown," I said.
"Like a warning label," Earl said.
On the ride home he gave me the other side of the ledger, the stuff nobody draws on their fridge. It's wide, so Earl parks at the far edge of every lot on earth. He calls it the dually spot. It's a quarter mile from the door. It may not fit your garage. You buy six tires, not four. And it rides stiff empty. Hank put it best: "Empty, she rides like a shopping cart full of bricks. Hook up the house and she settles right down."
By the time we got home, I had it. All of it. And I had a speech.
I rehearsed it in the shower. I rehearsed it brushing my teeth. I rehearsed it to Lugnut, who was not there, because Lugnut is a turtle on the side of a road. I just needed one more shot at the purple-haired guy.