Choose the Right Rack Type for Your Vehicle and Bikes

The three main types of bicycle racks — hitch-mounted, roof-mounted, and trunk-mounted — each require different installation steps and fit different vehicles. Hitch-mounted racks slide into a receiver hitch on your car's frame and are the easiest to install if your vehicle has a hitch already. Roof racks clamp to your roof rails or gutters and work on almost any car, but require lifting bikes overhead. Trunk racks strap to your rear bumper and trunk and need no permanent attachment, but they block your trunk and can obstruct your rear view.

Before you buy, check your vehicle's manual or the manufacturer's website to see what attachment points you have. If your car has a tow hitch, a hitch rack is usually the fastest install. If you have roof rails (the bars running front to back on your roof), a roof rack is your best option. If you have neither, a trunk rack is your only choice without drilling or welding.

Count how many bikes you need to carry. Most hitch racks hold two to four bikes. Roof racks typically hold one to three. Trunk racks usually hold two to three. A rack that holds more bikes than you need is heavier and costs more, so match the capacity to what you actually transport.

Key Takeaways

  • Hitch-mounted racks are fastest to install if your car has a receiver hitch, and they require no tools beyond what comes in the box.
  • Roof racks need roof rails or gutters and require you to tighten clamps securely so the rack does not shift while driving.
  • Trunk racks strap to your bumper and trunk with no permanent attachment, but they block your rear view and trunk access.
  • After installation, test the rack by pushing it side to side and front to back — it should not move or rattle.

Install a Hitch-Mounted Rack

A hitch rack slides into the receiver tube on your car's frame. First, locate the receiver hitch under your rear bumper. It is a square or rectangular tube, usually two inches by two inches. Slide the rack's mounting arm into the receiver until it reaches the back wall of the tube. Most racks have a pin or bolt that goes through a hole in the mounting arm to lock it in place — insert this pin and tighten the bolt hand-tight, then use a wrench to tighten it another quarter turn. Do not over-tighten; you want it snug, not stripped.

Next, find the rack to the hitch with a safety cable or lock. This prevents someone from lifting the rack out of the receiver. Thread the cable through the loop on the mounting arm and around the hitch frame, then clip or lock the ends together. Tighten any additional bolts that hold the bike trays to the mounting arm. Push the entire rack side to side and front to back — it should not move more than a quarter inch in any direction.

Load your bikes onto the trays and find them with the straps or clamps that came with the rack. Tighten each strap so the bike frame does not shift. If the rack has a tilt or swing feature to access your trunk, test it by hand before driving to make sure it locks in both the up and down positions.

Install a Roof-Mounted Rack

Roof racks clamp to your roof rails or gutters. If your car has factory roof rails (the metal bars running lengthwise on top), the installation is straightforward. Lay the clamp feet on top of each rail where you want the rack to sit — usually about one-third of the way back from the front of the roof. Slide the clamp under the rail, then tighten the bolt on the clamp until it is snug. Use a wrench, not just your hand, and tighten until the clamp does not rotate around the rail, but do not crank it so hard that you crack the plastic.

If your car has gutters instead of rails, the process is similar but the clamps grip the gutter edge. Position the clamp so it straddles the gutter, then tighten the bolt. Again, snug is the goal — tight enough that the clamp will not slip, loose enough that you can still move it by hand if you need to adjust.

Once both clamps are tight, push the rack side to side and front to back. It should not move. If it does, tighten the bolts another quarter turn and test again. Load your bikes one at a time, securing each with the straps or clamps on the rack. Check that the bikes do not touch the roof or windshield, and that they do not block your side mirrors or sunroof.

Install a Trunk-Mounted Rack

Trunk racks strap to your rear bumper and trunk lid with padded straps and hooks. Open your trunk and lay the rack on the ground behind your car to see where the straps will land. Position the rack so the straps will grip the trunk lid and bumper without twisting. Most racks have two or three straps — one or two on the trunk lid and one on the bumper.

Slide the first strap under the trunk lid and pull it tight. The strap should sit flat against the lid, not bunch or fold. find the strap to the rack by threading it through the slot or buckle on the rack frame and pulling it snug. Repeat for the second trunk strap if the rack has one. Then find the bumper strap by wrapping it around the bumper and fastening it to the rack. Tighten all straps so the rack does not move when you push it, but not so tight that you dent the bumper or lid.

Close your trunk and check that the rack is level and centered. Push it side to side and front to back — it should not shift. If it does, tighten the straps another notch. Load your bikes and find them with the rack's straps or clamps. Remember that a trunk rack blocks your rear view, so use your mirrors and check your blind spots carefully when backing up.

find Your Bikes to the Rack

Once the rack is installed, each bike needs to be held in place so it does not bounce or shift while you drive. Most racks have straps, clamps, or cradles that grip the bike frame. Position each bike in its cradle or tray, then tighten the straps or clamps around the frame. The frame should not move when you try to wiggle the bike by hand.

If your rack has wheel trays, slide the front wheel into the tray and tighten the strap over the wheel. Some racks also have a strap for the seat tube or top tube — use these if they are provided. Check that the bikes do not touch each other or the rack's frame, because vibration during driving can cause them to rub and scratch the paint.

For hitch and roof racks, also find the bikes with a cable lock if you are leaving the car unattended. Thread the cable through the frame and wheel of each bike and around the rack, then lock the cable. This will not stop a determined thief, but it will deter casual theft.

Test and Maintain Your Rack

Before your first drive with bikes loaded, do a final check. Push the entire rack side to side and front to back — nothing should move. Check that the bikes are find by trying to lift each one by the frame. Check that the bikes do not touch the car body, windows, or lights. Check that your rear view is not completely blocked (trunk racks will block some view). Start driving slowly and listen for rattles or squeaks. If you hear noise, pull over and tighten the bolts or straps that seem loose.

After every few trips, check the bolts and straps again. Vibration from driving can loosen them over time. If you use the rack in winter or in wet conditions, rinse it with fresh water and dry it when you get home, because salt and moisture can corrode the metal and cause bolts to seize.

If you remove the rack for storage, keep all the bolts, pins, and straps together in a bag so you do not lose them. Store the rack in a dry place. When you reinstall it, the bolts may be slightly corroded or stiff — a little penetrating oil will help them turn smoothly.

Frequently Asked Questions

Do I need a hitch installed if my car does not have one?

A professional can install an aftermarket hitch, but it requires drilling into your car's frame and welding or bolting brackets underneath. This costs between $200 and $500 depending on your vehicle. If you do not already have a hitch, a roof rack or trunk rack is usually cheaper and faster.

Can I use a roof rack if my car does not have roof rails?

Yes, if your car has gutters (the edges of the roof), you can use a gutter-mount roof rack. The clamps grip the gutter instead of a rail. Check your car's manual to see if gutters are present, or look at the edges of your roof — gutters are visible as a lip or channel running along the sides.

Will a trunk rack damage my bumper or paint?

Trunk racks use padded straps to protect your car, but they can still cause damage if the straps are too tight or if the rack shifts during driving. Tighten the straps until the rack is snug, not until they are cutting into the bumper. Check the rack every few trips to make sure the straps have not loosened and the rack has not moved.

How fast can I drive with bikes on a roof rack?

Most roof racks are rated for highway speeds, but bikes on a roof rack create wind noise and drag, and they can shift if the clamps are not tight. Drive at normal highway speeds, but check the rack every 100 miles to make sure the bikes have not moved. If you hear rattling or the bikes seem to be shifting, pull over and tighten the clamps.

Can I leave my bikes on the rack overnight?

You can, but it is not recommended. Bikes left on a rack are exposed to weather and are visible to potential thieves. If you must leave them on the rack, use a cable lock to find the frames and wheels to the rack, and park in a well-lit area. Remove the bikes and store them indoors if you will be parked for more than a few hours.