Category: Cargo & Storage

Disclosure: This article contains affiliate links. I may earn a commission at no extra cost to you.

Yes, one person can put a cargo box on a Subaru, but not every box on every Subaru. The box weighs 44 to 60 lb. The harder part is that it is 6 to 8 feet long and has to go above head height. This guide covers which boxes and models are realistic to do alone, and how to do it without scratching the paint.

Can You Do It Alone? Check Weight and Length

Box	Length	Empty weight
Thule Motion 3 L (16 cu ft)	about 77 in	about 44 lb
Yakima SkyBox NX 16	75.5 in	48 lb
Thule Motion 3 XL (18 cu ft)	about 85 in	about 51 lb
Yakima SkyBox NX 18	84 in	53 lb
Thule Motion 3 XXL (21 cu ft)	about 91 in	50-57 lb (sources differ)
Yakima SkyBox NX XXL	90.5 in	60.5 lb

Sources: Thule and Yakima published dimensions and retailer weight listings. Check the exact model you buy.

Rule of thumb: boxes under about 50 lb and 80 in are realistic to do alone for most adults. Above that, or on a taller Subaru, a second person makes the job safer for you and the paint.

How Tall Is Your Subaru?

Roof height decides how far overhead you lift. These are the factory heights to the top of the roof rails; the crossbars add a few inches.

Model	Height to top of rails	Notes
Crosstrek 2018-2026	63.0-63.6 in (about 5 ft 3 in)	Easiest to reach
Outback 2018-2025	66.1 in (Wilderness 66.9 in)	Easy to reach; 2026: 67.5 in (Wilderness 68.3 in)
Forester 2019-2026	68.1 in (Wilderness 68.9-69.3 in)	Tallest; about 5 ft 8 in to the rails

Source: Subaru trim comparison specifications. A Forester roof is about 5 in higher than a Crosstrek roof. A step stool fixes most of that.

Before You Lift

• Empty the box. Gear inside adds weight you do not need to move.
• Park on level ground with space on both sides, and clear of wind. A large box acts like a sail.
• Lay a towel or blanket on the roof edge and rear hatch area so a slip does not scratch the paint.
• Open the box and release the clamps so you can mount it without adjusting hardware overhead.
• Know where the crossbars are. See How Far Forward Should a Cargo Box Sit? for where the box should end up.

How to Lift a Cargo Box Alone

Side lift (good for Crosstrek and Outback)

1. Stand the box on its edge beside the car, close to the roof.
2. Lift one long edge onto the near crossbar.
3. Walk to the far side or push from the near side to slide it across, keeping it level.
4. Center it and position it to the rear-hatch rule, then tighten.

Rear slide (good for long boxes and tall Subarus)

1. Open the hatch fully and rest the rear end of the box on the rear crossbar from behind the car.
2. Lift the front end up and walk it forward on the bars.
3. Slide it into position, check the hatch swing, and then tighten the clamps.

Either way, rest one end on the bars before you take the full weight, and keep slow, even movements. If the box starts to tip, put it down on the roof instead of trying to save it.

After It Is On

• Tighten each clamp and check that the box does not move when you push on it.
• Open the hatch fully to check clearance before you drive.
• Recheck the mounts after the first few miles.

Position the Box for Hatch Clearance

Hatch clearance is decided by where the box sits, not by the roof. Many boxes that seem not to clear the rear hatch work fine once they are moved a few inches. The rear hatch swings up and forward, so anything hanging past the rear crossbar becomes a problem quickly.

• Slide the box forward until its rear edge is at or just ahead of the rear crossbar, inside the mounting range.
• Center it left to right to reduce door interference.
• Open the hatch before you fully tighten the clamps, so a problem shows up early.
• If the box cannot slide forward far enough, accept a little front overhang before accepting a blocked hatch, or pick a shorter box.

Wider crossbar spacing gives you more control over where the box lands. Factory rails work for mid-size boxes; longer boxes may need aftermarket bars for the extra adjustment. Full positioning rules are in How Far Forward Should a Cargo Box Sit?.

Load It to Cut Noise and Drag

• Pack heavier items low and toward the center of the box, not at the ends. Weight at the rear adds leverage on the mounts and amplifies movement in crosswinds.
• Keep tall or irregular items away from the front edge, which disturbs airflow and adds wind noise. Softer, flatter items go up front.
• Use soft bags to fill gaps so nothing shifts at speed.
• Leave a little empty space at the very front when you can.

Smart loading will not make a tall, wide box quiet, but it prevents the avoidable noise and instability. For noise fixes see How to Stop Roof Rack and Cargo Box Wind Noise.

When to Use Two People

• The box is an XL or XXL (about 85 in or longer, 50 lb or more).
• You are loading a Forester and are not tall.
• You have back or shoulder problems. A second person is not optional here.
• You are installing in wind, rain, or on a slope.
• You swap the box on and off often. A hoist or two people makes it routine.

Make Storage Easier on Yourself

The best solo setup starts in the garage. A box stored at waist height is far easier to lift than one stored overhead. A ceiling hoist like the StoreYourBoard Cargo Box Ceiling Storage Hoist lowers the box to you and raises it out of the way. Removing the box between trips also helps your fuel economy and wind noise. See Do Cargo Boxes Affect MPG? and How to Stop Roof Rack and Cargo Box Wind Noise.

Gear That Helps

• Cosco Folding Step Stool: a stable step for reaching the roof on a Forester or Outback
• StoreYourBoard Cargo Box Ceiling Storage Hoist: lowers the box from the garage ceiling to waist height
• Thule Motion 3: the L size is about 44 lb, lighter than the Yakima NX 16 at 48 lb

FAQs

Can one person install a cargo box?

Often yes, for a box under about 50 lb and 80 in, with a step stool on taller models. Larger boxes are easier with two people.

How much does an empty cargo box weigh?

Popular 16 to 21 cu ft boxes weigh roughly 44 to 60 lb empty. The Thule Motion 3 L is about 44 lb, the Yakima SkyBox NX 16 is 48 lb.

Which Subaru is easiest to load alone?

The Crosstrek, at about 63 in to the top of the rails. The Outback is about 66 in, and the Forester about 68 in.

Should the box be empty when I lift it?

Yes, always. Load it after it is mounted.

How do I avoid scratching my Subaru?

Put a towel on the roof edge and hatch area, keep the box level, and rest it on the bars instead of dragging it across the paint.

How tight is tight enough?

The box should not shift when you push it firmly by hand, but overtightening can damage the mounting hardware or rails. Tighten until secure, then recheck after your first drive.

Should the box be centered on the roof?

Mostly yes. Centered boxes balance better and make less noise. A slight offset is sometimes needed for hatch clearance, but uneven placement can add wind noise.

Do I need to measure my roof first?

Measuring helps, but a dry fit matters more. Roof length, crossbar spacing, and the box’s mounting slot range interact in ways measurements alone do not predict. Dry-fit before you tighten everything.

Do factory roof rails limit my options?

They work for most setups but offer less adjustment than aftermarket bars. Very long or heavy boxes may need the extra range to sit correctly.

Final Thoughts

A 44 to 50 lb box on a Crosstrek or Outback is a solo job with a little technique. An XL on a Forester is easier with help. Check the box weight, know your roof height, and use a step stool before you try to be strong.

Related Guides

• Best Cargo Box for Subaru Outback
• Best Cargo Box for Subaru Forester
• Best Cargo Box for Subaru Crosstrek
• What Size Cargo Box Fits an Outback?
• What Size Cargo Box Fits a Forester?
• What Size Cargo Box Fits a Crosstrek?
• Cargo Box Garage Clearance for Subarus
• Subaru Roof Weight Limits by Model and Year

Disclosure: This article contains affiliate links. I may earn a commission at no extra cost to you.

Adding a cargo box gives Crosstrek, Forester, and Outback owners more storage, but packing strategy matters just as much as box size.

A well-packed setup makes road trips, camping weekends, and family travel easier and more comfortable.

For most owners, the goal isn’t simply carrying more gear, it’s maximizing space while keeping important items easy to access.

Why Packing Strategy Matters

More Space Doesn’t Automatically Mean Better Organization

Adding cargo capacity does not automatically make packing easier. Without a plan, gear can become difficult to find and the interior can quickly become cluttered.

For many Crosstrek, Forester, and Outback owners, organizing items by frequency of use is more important than simply maximizing available space.

Accessibility Matters During Long Trips

Items needed throughout the day should be easy to reach without unloading half the vehicle. Snacks, jackets, pet supplies, and emergency gear are often better kept inside the cabin or near the rear hatch.

Thoughtful placement becomes especially important during family vacations, camping trips, and multi-day travel.

Proper Packing Improves Convenience

A well-packed Subaru is easier to live with on the road. Keeping heavier items secure and placing frequently used gear in accessible locations helps reduce frustration during stops.

For most owners, convenience comes from balancing cargo capacity with organization rather than trying to fill every available inch of space.

What Should Go In A Cargo Box?

Luggage

Luggage is one of the best uses for a cargo box. Suitcases and duffel bags are bulky but relatively lightweight, making them ideal for freeing up cabin space during family trips and vacations.

Camping Gear

Camping chairs, tents, sleeping pads, and other bulky gear fit well in a cargo box. Moving these items to the roof helps keep the interior organized and leaves more room for passengers and pets.

Sleeping Bags And Pillows

Sleeping bags, blankets, and pillows take up a surprising amount of space but weigh very little. Many Crosstrek, Forester, and Outback owners use their cargo box primarily for these soft items.

Strollers And Bulky Family Items

Strollers, pack-and-plays, and other family gear can quickly fill the cargo area. A roof box provides extra room without overcrowding the cabin, making longer trips more comfortable.

Sports Equipment

Skis, snowboards, fishing gear, and other outdoor equipment are common cargo box items. Keeping dirty or bulky gear outside the cabin helps protect interior space and improve passenger comfort.

What Should Stay Inside The Vehicle

Frequently used items, valuables, electronics, medications, snacks, and emergency supplies are usually better kept inside the vehicle. Easy access becomes especially important during long drives and road trips.

For most owners, the cargo box works best for bulky, lightweight items, while everyday essentials remain within reach inside the cabin.

Item Type	Cargo Box	Cabin
Suitcases	✓
Sleeping Bags	✓
Camping Chairs	✓
Coolers	✓
Electronics		✓
Pets		✓
Valuables		✓

Pack Heavy Items First

Keep Weight Low And Centered

Heavier items should be placed near the center of the cargo box and positioned as low as possible. This helps maintain vehicle stability and reduces unnecessary stress on the roof rack system.

Avoid Loading Everything To One Side

Uneven loading can affect balance and make the vehicle feel less stable. Distributing weight evenly across the cargo box helps improve handling and keeps the load more secure.

Follow Roof Weight Limits

Every Crosstrek, Forester, and Outback has roof load limits that include the weight of the crossbars, cargo box, and gear. Staying within those limits is more important than maximizing every inch of storage space.

Balance Matters More Than Maximum Capacity

Filling a cargo box to its maximum capacity is not always the best approach. A balanced load is usually easier to live with and can improve handling, stability, and overall driving comfort.

For most owners, proper weight distribution matters more than carrying the largest possible load.

Organize By Frequency Of Use

Items Needed Every Day

Snacks, water bottles, chargers, jackets, and other frequently used items are usually best kept inside the vehicle. Easy access reduces the need to open the cargo box during short stops and rest breaks.

Items Needed At Your Destination

Camping gear, luggage, extra clothing, and sports equipment are often only needed once you arrive. These items are good candidates for the cargo box because they free up interior space without sacrificing convenience.

Emergency Supplies

First-aid kits, flashlights, jumper cables, medications, and roadside equipment should remain easy to reach. Keeping emergency items inside the cabin or rear cargo area is usually more practical than storing them on the roof.

Why Accessibility Matters

A well-organized setup makes travel easier. Separating frequently used items from destination gear reduces unnecessary unpacking and helps keep the vehicle more comfortable and organized.

For most Crosstrek, Forester, and Outback owners, packing by frequency of use is just as important as maximizing storage space.

Packing For Different Types Of Trips

Weekend Trips

For short trips, many Crosstrek, Forester, and Outback owners only need a few bags and basic gear. Keeping frequently used items inside the vehicle and placing luggage in the cargo box helps maximize passenger comfort.

Family Vacations

Family travel often involves strollers, toys, coolers, and extra luggage. A cargo box can free up valuable cabin space, making long drives more comfortable for both adults and children.

Camping Trips

Camping gear tends to be bulky rather than heavy. Tents, sleeping bags, chairs, and pads are ideal cargo box items, while food, cooking supplies, and frequently used gear are often easier to access inside the vehicle.

Winter Travel

Winter trips usually require bulky jackets, boots, and snow gear. Keeping wet or dirty equipment outside the cabin helps preserve interior space and makes cleanup easier after the trip.

Road Trips With Pets

Traveling with dogs often means carrying crates, beds, food, and other supplies. Moving luggage and bulky gear to the roof creates more room inside the cabin and helps pets travel more comfortably.

Different trips require different packing strategies, but the goal is usually the same: maximize usable space while keeping important items easy to reach.

Trip Type	Common Cargo Box Items
Weekend Trips	Duffel bags, luggage
Family Vacation	Strollers, toys, luggage
Camping	Tents, chairs, sleeping bags
Winter Travel	Boots, jackets, snow gear
Road Trip With Pets	Beds, crates, pet supplies

Common Packing Mistakes

Overloading The Box

Trying to maximize every inch of space can lead to excessive weight and unnecessary stress on the roof rack system. Staying within the vehicle and cargo box weight limits is more important than filling the box completely.

Putting Frequently Used Items At The Bottom

Burying snacks, jackets, or other commonly used items beneath luggage and gear can make travel frustrating. Keeping frequently needed items accessible helps avoid constant unpacking during stops.

Carrying Too Much Weight Up High

Heavy gear placed on the roof raises the vehicle’s center of gravity and can affect handling. Many owners reserve the cargo box for bulky, lightweight items and keep heavier items inside the vehicle whenever possible.

Ignoring Weight Distribution

Loading one side more heavily than the other can affect balance and stability. Distributing weight evenly across the cargo box helps improve driving comfort and keeps the load secure.

Wasting Space

Poor organization can leave empty gaps while making the cargo box harder to use. Grouping similar items and packing efficiently often creates more usable space without adding extra gear.

For most Crosstrek, Forester, and Outback owners, thoughtful packing matters more than simply carrying the maximum amount of cargo.

Crosstrek vs Forester vs Outback

Crosstrek Considerations

The Crosstrek has the smallest cargo area of the three models, so owners often see the biggest improvement from adding a cargo box. Extra roof storage can make weekend trips and family travel much easier without sacrificing passenger space.

Forester Considerations

The Forester already offers generous interior room, but a cargo box provides additional flexibility for camping gear, sports equipment, and family vacations. The taller roof also makes loading and unloading relatively easy.

Outback Considerations

The Outback combines a spacious interior with a long roof, making it especially well suited for larger cargo boxes. Many owners use the extra space to keep the cabin comfortable during longer trips.

Which Subaru Benefits Most From A Cargo Box?

All three models benefit from additional roof storage, but the greatest advantage often goes to the Crosstrek because of its smaller cargo area. The Forester and Outback already provide more interior space, though both become even more versatile with a well-packed cargo box.

Ultimately, the biggest benefit depends less on the vehicle and more on how often you travel and how much gear you typically carry.

What Actually Works (Based On Real Use)

Soft Bags Usually Use Space More Efficiently

Soft duffel bags and flexible storage bags conform to the shape of the cargo box better than rigid suitcases. Many Crosstrek, Forester, and Outback owners find they can fit more gear without increasing box size.

Frequently Used Items Should Be Easy To Reach

Items needed during the trip are best kept inside the vehicle or near the top of the load. Easy access reduces the need to unpack the cargo box during fuel stops and rest breaks.

Heavy Gear Should Stay Low And Centered

Keeping heavier items low and evenly distributed helps maintain stability and improves overall driving comfort. Bulky, lightweight gear is usually better suited for the roof.

Packing Smart Matters More Than Having A Bigger Box

A larger cargo box does not automatically make travel easier. Thoughtful organization and efficient packing often provide more usable space than simply choosing the biggest box available.

For most owners, how you pack matters more than how much space you have.

FAQs

What should I put in a cargo box?

Bulky, lightweight items like luggage, camping gear, sleeping bags, strollers, and sports equipment.

What should not go in a cargo box?

Valuables, electronics, medications, and frequently used items are usually better kept inside the vehicle.

How much weight can I put in a cargo box?

Follow the cargo box and vehicle roof weight limits. Capacity varies by setup.

Should heavy items go in the cargo box?

Generally no. Heavy gear is usually better kept low inside the vehicle.

Can I put a cooler in a cargo box?

Yes, as long as it fits and stays within weight limits.

Should electronics stay inside the vehicle?

Yes. Electronics are easier to access and better protected inside the cabin.

How do I maximize cargo box space?

Use soft bags, pack efficiently, and avoid wasting space.

How do I organize luggage in a cargo box?

Place less frequently used items at the bottom and keep similar items grouped together.

Can I overload a cargo box?

Yes. Exceeding weight limits can affect safety and vehicle handling.

Which Subaru benefits most from a cargo box?

The Crosstrek typically sees the biggest benefit because of its smaller cargo area.

Final Thoughts

For most Crosstrek, Forester, and Outback owners, smart packing matters more than having a bigger cargo box.

The right setup depends on your gear and how you travel. As your needs change, factors like box size, weight distribution, and roof rack setup become just as important as storage space.

Recommended product:

• Thule Motion 3
• duffel bags

Related Guides

• Best cargo box for Subaru outback?

• Subaru Roof Weight Limits by Model and Year

• How Far Forward Should a Cargo Box Sit?

• Subaru Dog Setup

• Subaru Outback Car Camping Setup

• Do Cargo Boxes Affect MPG?

Disclosure: This article contains affiliate links. I may earn a commission at no extra cost to you.

Adding a cargo box is an easy way to gain storage, but many Crosstrek, Forester, and Outback owners wonder how much it affects fuel economy. Cargo boxes can reduce MPG, and the impact depends more on speed and aerodynamics than weight — highway driving typically shows the biggest difference. For most owners, the tradeoff is worth it: extra storage makes road trips and everyday travel more comfortable and practical.

Why Cargo Boxes Reduce MPG

Aerodynamic drag has a bigger effect on fuel economy than the weight of the box itself — even an empty box changes airflow and adds resistance, and box shape and overall height usually matter more than how much gear is inside. Losses are most noticeable at highway speed, where the vehicle works harder to overcome the added drag; many owners barely notice a difference around town but see a real impact on long highway trips. Some reduction in MPG is a normal tradeoff for the extra storage, not a sign something’s wrong with your setup.

How Much MPG Loss Is Typical

City driving usually shows little change — lower speeds mean less aerodynamic drag, so the impact stays modest. Highway driving produces the largest reduction, since higher speeds increase resistance more noticeably. Extended road trips show a measurable decrease compared to driving without a box, with the exact amount depending on speed, weather, and how heavily it’s loaded. Results vary setup to setup — vehicle speed, box shape, crossbar design, wind conditions, and total load all play a role.

Driving Situation	Typical MPG Impact
City Driving	Minimal
Mixed Driving	Small
Highway Driving	Moderate
Long Road Trips	Most Noticeable

What Affects Fuel Economy Most

Vehicle speed matters most — aerodynamic drag rises sharply as highway speeds increase, which is why a cargo box’s MPG impact is so speed-dependent. Larger boxes generally create more drag than smaller ones, but shape often matters more than size: lower-profile, streamlined boxes disturb airflow less than taller, boxier designs. Crossbars play a role too — lower-profile aerodynamic bars create less drag than wider, less streamlined designs. Weight still matters, but for most owners aerodynamic drag has the bigger effect on the final MPG number.

Does Box Size Matter?

Small and medium cargo boxes generally have less impact thanks to their lower profile and smaller surface area. Large boxes typically create more drag and bigger MPG losses at highway speed, though the difference isn’t always dramatic and depends heavily on the specific design. Two boxes with similar capacity can affect fuel economy differently — a taller box usually creates more resistance than a longer, lower-profile one, which is why overall shape matters more than the cubic-foot rating on the box. Choosing a size that matches your typical needs, rather than the largest one available, gives the best balance of cargo space and efficiency.

Crosstrek vs Forester vs Outback

The Crosstrek’s smaller size and lower profile help minimize drag, but a cargo box also represents a larger share of its total frontal area, so losses can still be noticeable on the highway. The Forester’s taller shape gives it excellent interior space but exposes the box to more airflow, so fuel economy losses tend to be more apparent, especially with larger or taller boxes. The Outback’s longer, lower-profile roof generally works well with cargo boxes, letting longer, lower-profile boxes sit more effectively. No model consistently loses the least MPG — box shape and driving speed matter more than which Subaru you drive, and a streamlined setup keeps the impact reasonable across all three.

Should You Remove It When Not in Use?

Many owners leave the box installed year-round for convenience, but it affects fuel economy, wind noise, garage clearance, and overall height every day it’s on, not just on trips. Others remove it when not needed to cut wind noise, improve efficiency, and simplify parking and garage access. The right call usually comes down to how often you actually use the extra space — and whether you have somewhere practical to store it (garage space, wall mounts, or a ceiling system) when it’s off the car.

Common Mistakes

• Driving faster than necessary. Higher speeds magnify a cargo box’s drag more than the weight inside it ever will.
• Using a larger box than needed. Oversized boxes add drag you don’t need — size to your typical trips, not the occasional one.
• Carrying unnecessary weight. Extra gear still makes the vehicle work harder — keep only what you actually need inside.
• Leaving unused accessories installed. Empty bike racks and kayak carriers still create drag — remove what you’re not using.

Is the Tradeoff Worth It?

Most families accept some MPG loss in exchange for storage that makes it easier to bring strollers, luggage, and outdoor gear without overcrowding the cabin. A cargo box frees up interior space so you don’t have to pack as tightly, and moving bulky items to the roof gives passengers more legroom and a less cluttered cabin — a real comfort upgrade on long drives. For most Crosstrek, Forester, and Outback owners, that added versatility is worth more than squeezing out a few extra MPG. Speed matters more than weight, a properly sized box keeps the penalty modest, and for most owners, convenience simply outweighs the cost.

FAQs

How much MPG does a cargo box reduce?

Most owners see a small reduction, with highway driving showing the biggest impact.

Does highway speed affect fuel economy more than city driving?

Yes — higher speeds have a much greater effect on MPG than city driving does.

Do larger cargo boxes reduce MPG more?

Generally yes, though box shape and height often matter more than raw capacity.

Does weight or aerodynamics matter more?

Aerodynamics usually has the bigger impact.

Should I remove my cargo box when not using it?

For many owners, yes — removing it improves MPG and reduces wind noise.

Which Subaru loses the most MPG with a cargo box?

There’s no consistent answer — box design and driving speed matter more than the vehicle itself.

Are cargo boxes worth the fuel economy penalty?

For most owners, yes — the added storage and passenger comfort usually outweigh a modest MPG hit.

Do crossbars affect MPG too?

Yes — crossbar shape and exposed overhang both contribute to additional drag.

Final Thoughts

Cargo boxes do affect MPG, but for most Crosstrek, Forester, and Outback owners, the tradeoff is worth it. The best setup depends on how you use your Subaru — choosing the right box size and shape usually matters more than chasing maximum fuel economy.

Related Guides

• How to Stop Roof Rack and Cargo Box Wind Noise on a Subaru

• How Far Forward Should a Cargo Box Sit?

• Cargo Box Garage Clearance for Subarus: Real Heights and Slim Box Picks

• Best Cargo Box for Subaru Outback

• Best Cargo Box for Subaru Forester

• Best Cargo Box for Subaru Crosstrek