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Route 66 Auto Repair in Upland rents enclosed U-Haul cargo trailers in 4x8, 5x8, 5x8 with ramp and 6x12 sizes from our lot in Upland. A cargo trailer lets your own SUV or pickup carry a load under cover, without renting a truck. Before you leave, a technician runs a free hookup check on your hitch, ball, chains and lights.
Why rent a cargo trailer instead of a truck?
If your vehicle already has a proper hitch, a trailer lets you drive what you know. You keep your own seats, mirrors and air conditioning, and the trailer carries the load behind you. That matters on a long drive in August, and it matters when only one person in the family can drive.
An enclosed trailer also locks. Boxes, electronics and mattresses stay out of the wind, dust and sun. For open loads like mulch or a riding mower, look at utility trailers instead.
What size cargo trailer do I need?
These are typical uses. Confirm current capacity on uhaul.com for your reservation.

| Trailer | Often chosen for | Good to know |
|---|---|---|
| 4x8 cargo trailer | A dorm room, boxes, a few small pieces | The easiest size for smaller tow vehicles to handle |
| 5x8 cargo trailer | A studio or a small 1 bedroom | A popular all-around size |
| 5x8 with ramp | Heavy items like appliances or a mower that roll in | Loading ramp instead of lifting |
| 6x12 cargo trailer | A 1 to 2 bedroom move behind a capable truck or SUV | Needs a tow vehicle rated for a larger trailer |
Compare each cargo trailer
Smaller trailers
The 4x8 cargo trailer suits light loads and smaller tow vehicles. The 5x8 cargo trailer adds room for a studio's worth of belongings.
Ramp and larger trailers
The 5x8 with ramp lets you roll heavy items in. The 6x12 cargo trailer is the largest enclosed size we rent.
Can my vehicle tow a cargo trailer?
It depends on three things: the vehicle's towing rating, the hitch installed on it, and the trailer you choose. When you reserve on uhaul.com (opens in a new tab), you enter your vehicle and the system checks whether the pairing is allowed. Your owner's manual lists your vehicle's rating.
At pickup, we compare the hitch rating with U-Haul requirements as part of the free hookup check. If something does not match, we say so plainly before you load a single box.
Do I need my own hitch and ball?
Yes. Your vehicle needs a hitch receiver, a ball mount and a ball that matches the trailer's coupler, plus a working light connector. Ball sizes are not all the same, and a mismatch is the most common problem we catch. Check the size stamped on your ball before moving day and compare it to your reservation details.
If your lights don't work at the plug, the trailer lights won't either. Test them at home with a helper.
What does the free hookup check look at?
This is a check of the connection, not a mechanical inspection. See the free towing inspection page for details.
Checklist
- 01Coupler and ball size match
- 02Coupler latched and the pin in place
- 03Safety chains crossed under the tongue
- 04Brake, turn and running lights working
- 05Tongue weight suited to the load
- 06Hitch rating against U-Haul requirements
How should you load an enclosed trailer?
Loading changes how a trailer tows. Too much weight at the back makes it sway. Too much at the front pushes down on your rear axle.
- Put the heaviest items in front, just ahead of the trailer axle
- Balance weight left to right
- Tie everything down so it cannot shift
- Keep the load low and stack light boxes on top
- Never ride or let pets ride in the trailer
What changes when you tow on Inland Empire roads?
Stopping takes longer, so leave a bigger gap on Foothill Blvd and the 10. Swing wide in turns. On the Cajon Pass or the 57 grade, drop to a lower gear and watch your temperature gauge. Heat is the enemy of a tow vehicle. If your car already runs warm, book a look with our cooling and AC services team before the trip.
When is a truck the better choice?
A trailer is not always the easy answer. If your vehicle has no hitch, has a low towing rating, or already runs hot, a truck avoids the problem. The same goes for a first move with a heavy load and a long climb out of the valley. Our moving trucks and vans page compares every truck size.
A truck also means no unhooking and no backing a trailer into a tight driveway. For some renters, that alone decides it.
Enclosed or open trailer?
Choose enclosed when the load is boxes, bedding, electronics or anything that should stay locked and out of the sun. Our enclosed cargo trailer page goes deeper, and the weather-protected trailer page covers rain and dust.
Choose open when the load is dirty, tall or loaded by machine, such as green waste, lumber or a mower. Open trailers hose out easily but leave everything exposed.
What should first-time towers know?
- Practice a few turns in an empty lot before the real drive
- Check the mirrors often, since a trailer can hide cars behind you
- Brake early and gently, and leave far more space than usual
- Walk around the trailer at every stop to check the latch and chains
- Avoid backing up unless you have space and a spotter
How do you unhook and return a trailer?
Park on level ground, lower the tongue jack if the trailer has one, and unplug the lights before lifting the coupler. Remove the chains last. Sweep out the cargo area and take a photo of it empty.
If you return after we close, follow the after-hours return steps with the drop card and photos. Keep them until U-Haul sends the final receipt.
What should you bring to trailer pickup?
Bring your license, your reservation and the tow vehicle with its hitch, ball mount and ball installed. Clear the trunk area so the rear of the vehicle sits at its normal height. If you know your ball size, note it before you arrive.
Where do you park a trailer during the move?
Plan parking before you leave our lot. Many apartment complexes in Upland, Ontario and Rancho Cucamonga limit where trailers can sit, and some will not allow an unhooked trailer overnight. Ask the leasing office in advance, and have a backup spot in mind.
On the street, choose a place where you can pull forward to leave, so you never have to reverse into traffic. Keep the trailer hooked up if you can, and lock the cargo door every time you step away. If the trailer must stay unhooked, set it on level ground and chock a wheel so it cannot roll. When you stop for food on a long trip, pick a lot with pull-through spaces and park where you can see the trailer from your table.
Our cargo trailer pickup process
Step 1: Check in
License and reservation at the counter, with your tow vehicle on the lot.
Step 2: Inspect the trailer
We walk the trailer together and note existing marks.
Step 3: Photograph
Condition and cargo-area photos go on file.
Step 4: Hook up and check
A technician runs the free hookup check and tests the lights.
Step 5: Pull out slowly
Make a slow lap of the lot to feel the trailer before you pull out into traffic.
What's included with a cargo trailer rental
Included on the work order
- 01Counter check-in with contract review
- 02Walk-around with existing damage noted
- 03Cleanliness photo of the cargo area
- 04Free hookup check on coupler, pin, chains and lights
- 05Tongue weight and hitch rating review
- 06Unhook and return instructions
Is your tow vehicle ready?
The hookup check does not cover brakes, tires, cooling or the transmission. For those, a paid vehicle safety inspection gives you a written result, and the fee is stated at the counter before testing. If your pedal feels soft or you hear grinding, start with brake services.
Cargo Trailers: all options
Each page explains the symptoms, how we test, what the work order includes and what to ask before you approve.
Videos from the shop
Frequently asked questions
What size cargo trailer do I need?
A 4x8 suits a dorm or a few pieces, a 5x8 suits a studio or small 1 bedroom, and a 6x12 suits larger loads behind a capable vehicle. Confirm current capacity on uhaul.com before you reserve.
Can my car tow a 5x8 cargo trailer?
It depends on your vehicle's towing rating and hitch. Enter your vehicle when you reserve on uhaul.com, which checks the pairing, and we review the hitch rating during the free hookup check.
Do I need a hitch to rent a trailer?
Yes. Your vehicle needs a hitch, a ball mount, a ball that matches the trailer coupler, and working light wiring. We check all of it at pickup.
Is an enclosed trailer weather protected?
An enclosed trailer keeps most sun, dust and rain off your load and can be locked. Wrap electronics and mattresses anyway, since seals and doors are not airtight.
What ball size does a U-Haul trailer use?
It can vary by trailer, so check your reservation details and the size stamped on your ball. During the free hookup check we confirm the ball matches the coupler before you leave.
Can I rent a cargo trailer one-way?
Often, yes. The uhaul.com listing shows whether one-way is available for the trailer, route and date you want.
Will you check my car before I tow?
The free check covers the hookup only. A mechanical check of brakes, tires, cooling and transmission is a paid vehicle safety inspection with a written result.
Can I rent a cargo trailer if I have never towed before?
Yes, if your vehicle and hitch meet U-Haul requirements. Start with a smaller size, practice turns in an empty lot, and ask questions during the free hookup check. We explain the basics before you leave.
