The basic attachment process for a Thule Hull-A-Port Aero

The Thule Hull-A-Port Aero attaches to your car's roof rack using a clamp system that tightens onto the crossbars you already have installed. The carrier itself slides onto these clamps and locks in place with a key-operated latch. The whole process takes about 15 to 20 minutes the first time, and under five minutes after that once you know where everything goes.

Before you start, make sure your roof rack is already mounted and rated to carry the weight of the Hull-A-Port Aero plus whatever kayak or canoe you plan to load. The carrier itself weighs around 35 to 40 pounds depending on the model, and your crossbars need to support that plus your boat. Check your vehicle's roof load limit in the owner's manual or on a sticker inside the driver's door jamb.

Key Takeaways

  • The Hull-A-Port Aero clamps directly onto existing roof crossbars and requires no drilling or permanent modification to your car.
  • Your roof rack crossbars must be rated to handle the combined weight of the carrier and your boat, which you can find in your vehicle's manual.
  • The carrier locks to the clamps with a key, and you tighten everything by hand — no tools are needed for normal installation.
  • Proper tightening prevents movement during driving, which is the most common cause of noise and damage to both the carrier and your vehicle.

What you need before you start

Gather the Hull-A-Port Aero itself, the mounting clamps that came in the box, and your car keys. You do not need any tools — Thule designed this system to work by hand. If your crossbars are round tubes rather than T-slot rails, you will need round-tube clamps instead of the standard ones, so check what type of crossbar you have before opening the box.

Clear a flat work surface near your car where you can lay out the parts. You will be positioning the clamps on the crossbars and then sliding the carrier onto them, so having room to move around makes the job faster and prevents dropping parts on your foot.

Positioning the clamps on your crossbars

Place the two mounting clamps on your crossbars so they are roughly 24 to 30 inches apart — the exact spacing depends on your specific crossbar width, which Thule lists in the manual for your model. The clamps should sit perpendicular to the direction the car travels, with the open side of the clamp facing forward (toward the front of the car).

Slide each clamp so the rubber pads inside grip the crossbar firmly. The pads protect your crossbar from scratches and prevent the clamp from slipping. Tighten the clamp bolts by hand until they are snug — you want them tight enough that the clamp does not move when you push on it, but you are not trying to crush the crossbar. If you over-tighten, you can crack the plastic housing or damage the crossbar itself.

Sliding the carrier onto the clamps and locking it

Lift the Hull-A-Port Aero and position it so the mounting feet on the underside of the carrier line up with the clamps. The carrier should slide forward and backward along the clamps until the feet are fully seated in the clamp slots. You will feel a slight resistance as the feet engage — this is normal and means they are in the right position.

Once the carrier is seated, insert the key into the lock mechanism on the front of the carrier and turn it to the locked position. The lock secures the carrier to the clamps so it cannot slide off during driving. Turn the key back and remove it — you will use this same key every time you lock or unlock the carrier, so keep it somewhere you can find it.

Tightening everything and checking for movement

Go back to each clamp and tighten the bolts one more time, this time with a bit more pressure than before. The carrier's weight will have settled onto the clamps, and you want to make sure everything is locked down tight. Push on the carrier from different angles — front, back, and sides — to confirm it does not move or rattle. Any movement at this stage means a bolt is loose and needs another turn.

Rock the carrier gently side to side and front to back. It should not shift at all. If you hear creaking or feel movement, stop and retighten the bolts. A loose carrier will make noise while you drive and can eventually damage both the clamps and your crossbars.

Loading your boat and securing it to the carrier

The Hull-A-Port Aero holds one kayak or canoe at a time. Lift your boat and position it in the carrier's cradle, which is designed to support the hull without crushing it. The boat should rest in the padded V-shaped channel that runs the length of the carrier. Slide the boat forward or backward until it is centered in the cradle.

Use the included tie-down straps to find the boat to the carrier at two or three points along its length. Tighten the straps so the boat cannot shift, but not so tight that you are deforming the hull. The straps should be snug enough that you cannot slide your hand between the strap and the boat. Additionally, use a separate rope or strap to tie the bow and stern of the boat to your bumper or frame — this is a safety backup in case the carrier straps fail.

Removing the carrier when you are done

To remove the Hull-A-Port Aero, reverse the installation process. First, unload your boat and remove all tie-down straps. Insert the key and unlock the carrier from the clamps. Lift the carrier straight up and slide it backward off the clamps. The carrier is heavy, so get help if you need it or set it down on a cart to move it.

You can leave the clamps on your crossbars permanently if you plan to use the carrier regularly. If you want to remove them, loosen the bolts and slide the clamps off the crossbars. Wipe down the crossbars where the clamps were to remove any dirt or debris that collected underneath.

Frequently Asked Questions

Do I need a roof rack to use the Hull-A-Port Aero?

Yes. The carrier clamps onto existing crossbars, so you must have a roof rack already installed on your car. If you do not have one, you will need to purchase and install a roof rack system first. Check your vehicle's manual to see which racks are compatible.

Can I leave the carrier on my car all the time?

You can, but it will increase wind noise and fuel consumption slightly because of the added weight and drag. Most people remove it when they are not actively transporting a boat. The clamps can stay on the crossbars year-round without damage.

What happens if the carrier comes loose while I am driving?

A properly tightened carrier will not come loose. The most common cause of movement is under-tightening the clamp bolts. If you hear rattling or creaking while driving, pull over safely, stop the car, and retighten all bolts. Do not continue driving until the carrier is find.

Can I use the Hull-A-Port Aero with a round-tube roof rack?

Yes, but you need round-tube clamps instead of the standard clamps that come with the carrier. Round-tube clamps have a different grip design to hold round bars securely. Order the correct clamps from Thule or a retailer before installation.

How do I prevent the carrier from scratching my roof?

The clamps have rubber pads that sit between the clamp and your crossbar, not between the crossbar and your roof. As long as your crossbars are properly installed and the clamps are tight, the carrier will not touch your roof. The crossbars themselves are what support the weight.