How to Choose the Right Car Hauler Size for Your Vehicle

"It's a car, it'll fit on a car trailer" is one of those assumptions that holds up right until it doesn't. Then you're standing at a pickup lot with a deck that's 2 ft short, or a dually whose rear tires are wider than the space between the fenders, or a lowered coupe scraping its front lip where the ramp meets the deck.

Choosing a car hauler size isn't complicated, but it is specific. It comes down to a few measurements and one weight, and every one of them is knowable before you book instead of at the moment you're trying to drive up the ramps.

Get These Numbers Off Your Vehicle First

Before you open a single listing, write down five things about the vehicle you're moving:

• Overall length, bumper to bumper, not wheelbase
• Overall width, and separately the track width at the widest axle, since mirrors don't matter but tires do
• Curb weight, the actual weight of the vehicle as it sits
• Ground clearance, particularly at the front lip or air dam
• Wheelbase, which affects how the car sits between the trailer's axles

All of it is in the owner's manual, on the manufacturer's spec page or on the door jamb. A search for the year, make and model plus "curb weight" or "dimensions" gets you most of it in five minutes, and it prevents the entire problem this post is about.

Deck Length: The One People Get Wrong

Match deck length to overall length, with margin

The deck has to fit the vehicle's full bumper-to-bumper length, plus room to position it properly. A good rule is a deck that exceeds the vehicle's length by at least 2 to 3 ft, which gives you space to slide the car fore and aft for correct tongue weight and to rig the tie-downs.

As a rough guide, most passenger cars up to about 16 ft fit on a 16 to 18 ft deck. Full-size pickups and large SUVs, which commonly run 17 to 21 ft, typically need a 20 to 22 ft deck. A crew cab long bed is genuinely long, and classic cars are usually longer than people remember.

Why the margin matters

That extra couple of feet isn't padding, it's adjustment. Where the vehicle sits on the deck determines your tongue weight, and a deck that only just fits removes your ability to move the car at all. Overhanging the back of the deck isn't a fix.

Deck lengths vary between listings, so check the specific trailer rather than assuming a category standard. Browse car hauler trailer rentals and compare the listed deck length against your number.

Width, Fenders and Track

Usable width is between the fenders

On most car haulers the tires run between the fenders, so the measurement that matters isn't the trailer's overall width. It's the clear space between the wheel wells. Compare that against your vehicle's track width at the widest axle.

Where this bites

Dual-rear-wheel pickups are the usual casualty, along with wide-body builds, aftermarket fender flares and anything running aggressive wheel offset. If your vehicle is wide, a standard car hauler may simply not have the room, and that's a booking problem rather than a loading-day problem if you catch it early.

When the vehicle is too wide for a car hauler's wheel wells, a flatbed or a deckover is usually the answer, since a deckover runs the deck above the wheels for a full-width usable surface.

Don't forget door clearance

You also need to open the driver's door far enough to get out once the car is on the deck. It's an easy thing to overlook right up until you're climbing out of a window in a parking lot.

Ground Clearance and Ramp Angle

The problem is the transition, not the ramp

A low front lip, air dam or splitter doesn't usually catch on the ramp itself. It catches at the breakover, where the ramp meets the deck and the angle changes. Sports cars, lowered vehicles and anything with a chin spoiler are the ones at risk.

What reduces the angle

Standard fold-down ramps vary quite a bit, roughly 10 to 18 degrees depending on the trailer, and steeper is harder on a low car. A tilt deck brings the whole deck down to a much shallower approach, typically around 5 to 8 degrees, with no transition lip at all.

The practical threshold: if your vehicle has less than about 4 to 5 in of front clearance, confirm the ramp angle on the specific listing or look for a tilt-deck configuration rather than hoping. Longer ramps and a lower deck height both help, and boards or blocks under the ramps flatten the angle in a pinch.

The Weight Math, Including the EV Problem

Payload has to exceed curb weight, with margin

The trailer's payload is its gross vehicle weight rating (GVWR) minus its own empty weight, and that number has to comfortably exceed the curb weight of the vehicle you're loading. Add anything riding along: a full fuel tank, a set of wheels, tools, parts in the trunk. Read more about GVWR for how the ratings work.

Modern vehicles are heavier than you think

This is where estimating goes wrong. Trucks and SUVs have put on substantial weight over the last couple of decades, so a mental model built on a vehicle from 2005 will underestimate the current equivalent.

Electric vehicles are the bigger surprise. Battery packs make an EV significantly heavier than a comparable gas model, often by several hundred pounds and sometimes well over a thousand. That's enough to push a load past a trailer that would have handled the gas version without complaint. Look up the actual curb weight for the specific year and model rather than estimating from how big the car looks.

Then check the tow side

Once the trailer fits the vehicle, the loaded trailer still has to fit your truck. Trailer weight plus vehicle weight has to stay within your tow vehicle's rated capacity, and that's a whole topic of its own. Read more about what hitch and tow vehicle you need to pull a car hauler.

Size Isn't the Only Choice

Once the dimensions and weight work, a few other decisions follow, and each one has its own guide:

• Open or enclosed, single or double deck. Enclosed protects paint and locks up; deck configuration matters if you're moving two vehicles. See open vs. enclosed, single vs. double deck
• A trailer or a tow dolly. A dolly lifts two wheels and costs less, but it isn't right for every vehicle or drivetrain. See car trailer vs. auto dolly
• If the car doesn't run. That changes the loading method and the equipment you need. See how to tow a non-running vehicle
• Loading and tie-down. Where the car sits and how it's secured. See how to load and tie down a car

What about insurance and damage protection?

Before towing a rented trailer, contact your auto insurance provider to ask whether your policy covers liability and towing-related damage claims.

Eligible rentals booked through Big Rentals also include Basic Rental Protection at checkout. This added protection can help limit your financial responsibility for certain damage or theft events during the rental period.

For full details on how Basic Rental Protection works, including deductibles, exclusions, and renter responsibilities, review our FAQ and platform terms.

The Short Version

• Look up five numbers before you shop: overall length, track width, curb weight, ground clearance and wheelbase
• Pick a deck that exceeds the vehicle's length by at least 2 to 3 ft, since you need room to position the car for proper tongue weight
• Most passenger cars fit a 16 to 18 ft deck; full-size trucks and large SUVs usually need 20 to 22 ft
• Check the usable width between the fenders, not the trailer's overall width, which is what catches dually pickups and wide-body builds
• For a low car, the risk is the breakover where the ramp meets the deck, so check the ramp angle or look for a tilt deck under about 4 to 5 in of front clearance
• The trailer's payload, its GVWR minus its own weight, has to exceed the vehicle's curb weight with room to spare
• Look up the real curb weight rather than guessing, especially for EVs and modern trucks, which are heavier than their older equivalents
• Then confirm your tow vehicle can handle the loaded trailer

Browse car hauler trailer rentals near you.