Disclosure: This article contains affiliate links. I may earn a commission at no extra cost to you.
Many Crosstrek owners eventually run out of cargo space for road trips, camping gear, and family travel.
A cargo box is an easy way to add storage without moving to a larger vehicle. Fortunately, the Crosstrek works well with a wide range of box sizes.
The key is choosing a size that matches how you actually use your Subaru. In most cases, fitment and everyday usability matter more than maximum capacity.
Why Cargo Boxes Are So Popular On Crosstreks
The Crosstrek Has Less Cargo Space Than Larger Subarus
Compared to the Forester and Outback, the Crosstrek offers less interior cargo space.
For many owners, a cargo box provides valuable extra storage without requiring a larger vehicle.
Road Trips And Outdoor Gear Add Up Quickly
Luggage, camping gear, coolers, skis, and sports equipment can quickly fill the Crosstrek’s cargo area.
Even couples and small families often find themselves needing more space for longer trips and outdoor adventures.
Roof Storage Solves The Biggest Limitation
A cargo box adds carrying capacity while keeping the cabin comfortable and uncluttered.
Moving bulky items to the roof allows passengers and pets to enjoy more space inside, making the Crosstrek much more practical for travel.
Understanding Cargo Box Sizes
Small Cargo Boxes (10-14 Cubic Feet)
Small cargo boxes work well for couples, weekend trips, and overflow storage.
They provide extra room for luggage and outdoor gear while keeping the overall setup compact and easy to live with.
Medium Cargo Boxes (15-17 Cubic Feet)
Medium cargo boxes offer a balance between capacity and everyday usability.
For many Crosstrek owners, this size range provides enough space for vacations, camping gear, and seasonal equipment without becoming overly bulky.
Large Cargo Boxes (18-20 Cubic Feet)
Large cargo boxes are popular with families and frequent travelers.
They provide room for multiple suitcases, coolers, strollers, and bulky gear, making them well suited for longer trips and outdoor adventures.
XL Cargo Boxes (21+ Cubic Feet)
XL cargo boxes maximize storage capacity and are best suited for large families and extended travel.
While the Crosstrek can accommodate these larger boxes, fitment and hatch clearance become increasingly important as box size increases.
| Size Category | Typical Capacity | Best For |
| Small | 10–14 cu ft | Couples, weekend trips |
| Medium | 15–17 cu ft | Most owners |
| Large | 18–20 cu ft | Families, camping |
| XL | 21+ cu ft | Extended travel, maximum storage |
What Size Cargo Box Fits A Crosstrek Best?
Best Size For Most Owners
For most Crosstrek owners, a medium cargo box in the 15-17 cubic foot range offers the best balance of capacity and everyday usability.
It provides enough space for vacations, camping gear, and seasonal equipment without becoming overly bulky.
Best Size For Couples
Couples often find that small to medium cargo boxes provide all the extra storage they need.
A box in the 10-17 cubic foot range works well for weekend trips, luggage, and outdoor gear while keeping the setup compact.
Best Size For Families
Families typically benefit from larger boxes in the 18-20 cubic foot range.
The added capacity helps accommodate strollers, coolers, suitcases, and other bulky items that quickly fill the Crosstrek’s cargo area.
Best Size For Camping Trips
Camping gear can consume space quickly. Medium and large boxes usually provide enough room for tents, sleeping bags, chairs, and other equipment while preserving passenger comfort inside the vehicle.
When A Large Box Makes Sense
Large cargo boxes make sense for families, frequent travelers, and owners who regularly carry bulky gear.
With proper fitment, the Crosstrek can comfortably handle many 18-20 cubic foot boxes.
Why XL Boxes Are Usually Unnecessary
While XL boxes are possible, they often add size and complexity without providing meaningful benefits.
For most Crosstrek owners, medium and large boxes offer a better balance of storage capacity, fitment, and everyday usability.
| Use Case | Recommended Size |
| Daily Travel | Small-Medium |
| Couples | Small-Medium |
| Families | Large |
| Camping Trips | Medium-Large |
| Winter Sports | Medium-Large |
Bigger Isn’t Always Better
Weight And Loading Height
Larger cargo boxes offer more storage, but they are also heavier and harder to load.
For many Crosstrek owners, a slightly smaller box is easier to manage while still providing plenty of capacity.
Wind Noise And Fuel Economy
Larger boxes create more aerodynamic drag and can increase wind noise, especially at highway speeds.
While the impact varies, bigger boxes are generally more noticeable during daily driving and long trips.
Garage Clearance
As cargo boxes get larger, overall vehicle height becomes more important.
Owners who regularly use garages or parking decks should consider clearance before choosing the largest box available.
Daily Driving Practicality
Many owners leave their cargo boxes installed for extended periods, making everyday usability important.
A large box provides impressive storage, but it also adds height, weight, and bulk. For many Crosstrek owners, choosing a size that matches their typical travel needs results in a more practical setup.
Hatch Clearance Matters More Than Capacity
Why Box Length Matters
Cargo box length often has a bigger impact on usability than overall capacity.
Longer boxes can extend farther over the rear of the Crosstrek, increasing the chances of interfering with the rear hatch when opened.
Crossbar Positioning And Bar Spread
Proper crossbar placement plays a major role in maintaining hatch clearance.
Adjusting bar spread and box position can often solve clearance issues without requiring a smaller box. In many cases, setup flexibility matters more than box size.
Common Clearance Problems
One of the most common mistakes is focusing only on cubic feet and ignoring overall box dimensions.
A box that is too long or mounted too far back can prevent the hatch from fully opening and make loading less convenient.
Why Proper Fitment Matters More Than Cubic Feet
Two cargo boxes with similar capacities can have very different dimensions and fitment characteristics.
For most Crosstrek owners, proper fitment, box length, and crossbar positioning matter more than maximizing storage volume.
Cargo Box Size By Crosstrek Generation
2013-2017 Crosstrek
First-generation Crosstreks work well with small and medium cargo boxes.
Large boxes are possible, but proper fitment and hatch clearance become more important as box size increases.
2018-2023 Crosstrek
Second-generation Crosstreks offer improved roof rack systems and enough roof space for a wide range of cargo boxes.
Most owners find that medium and large boxes provide the best balance of capacity and usability.
2024-Present Crosstrek
Current-generation Crosstreks are well suited for medium and large cargo boxes.
With proper fitment, many owners comfortably use boxes in the 15-20 cubic foot range for road trips, camping, and family travel.
Crosstrek Wilderness Considerations
The Crosstrek Wilderness offers similar roof dimensions to the standard model, but owners should still verify crossbar compatibility and cargo box fitment.
Its additional ride height can make loading slightly more challenging, making ease of access just as important as storage capacity.
Crosstrek vs Forester Cargo Box Sizes
Why Foresters Can Support Larger Boxes More Easily
The Forester’s larger roof and taller body make it easier to accommodate larger and XL cargo boxes.
Additional roof space provides more flexibility for box placement and hatch clearance.
Why Most Crosstrek Owners Don’t Need XL Boxes
Most Crosstrek owners find that medium and large cargo boxes provide plenty of storage for vacations, camping gear, and family travel.
While XL boxes are possible, they often add size and complexity without providing meaningful benefits.
Similar Storage Goals, Different Roof Lengths
Both vehicles are commonly used for road trips and outdoor adventures, and both can accommodate a wide range of cargo boxes.
The difference is that the Forester offers more flexibility with larger boxes, while the Crosstrek benefits from choosing sizes that maximize storage without overwhelming the vehicle.
| Feature | Crosstrek | Forester |
| Roof Length | Shorter | Longer |
| Most Common Box Size | Medium | Medium-Large |
| Large Box Compatibility | Good | Excellent |
| XL Box Compatibility | Limited | Better |
| Best Overall Size | 15–17 cu ft | 15–20 cu ft |
What Actually Works (Based On Real Use)
Medium And Large Boxes Fit Most Needs
For most Crosstrek owners, medium and large cargo boxes provide the best balance of storage capacity and everyday usability.
They offer enough space for vacations, camping gear, and family travel without becoming unnecessarily bulky.
Most Owners Need More Storage, Not The Biggest Box
Many owners simply need extra room, not maximum capacity.
A properly sized box is usually easier to live with and provides all the storage needed for typical trips.
Families Quickly Outgrow Small Boxes
Small boxes work well for couples and weekend travel, but families often find themselves needing more space over time.
Strollers, coolers, and extra luggage can quickly make larger boxes the more practical choice.
Fitment Matters More Than Maximum Capacity
The best cargo box is one that fits the Crosstrek properly and works with your crossbar setup.
For most owners, hatch clearance, box length, and overall usability matter far more than squeezing out a few extra cubic feet of storage.
FAQs
What size cargo box fits a Subaru Crosstrek?
Most Crosstreks comfortably accommodate cargo boxes in the 15-20 cubic foot range. Proper fitment and hatch clearance matter more than capacity alone.
Is an 18 cubic foot cargo box too big for a Crosstrek?
No. An 18 cubic foot box is a popular size and works well for many families and road-trip setups.
Can a Crosstrek fit a 21 cubic foot cargo box?
Yes. Some Crosstreks can accommodate 21+ cubic foot boxes, but fitment and hatch clearance become more important.
Which size is best for a family of four?
For most families, an 18-20 cubic foot box provides a good balance of capacity and practicality.
Does the Crosstrek Wilderness fit larger cargo boxes?
Yes. The Crosstrek Wilderness can support larger boxes with the proper crossbar setup and fitment.
Will a larger cargo box affect gas mileage?
Yes. Larger boxes create more aerodynamic drag and may reduce fuel economy, especially at highway speeds.
Can you still open the rear hatch with a large box?
Usually yes, provided the box is properly sized and positioned. Hatch clearance should always be verified during installation.
Do I need aftermarket crossbars for larger cargo boxes?
Not always. Many factory crossbars work well, but larger boxes may benefit from aftermarket systems that offer greater adjustment and positioning flexibility.
Is a bigger cargo box harder to live with every day?
It can be. Larger boxes add height, weight, and bulk, making them more noticeable during daily driving and parking.
Final Thoughts
The best cargo box size depends on your travel habits and storage needs.
For most Crosstrek owners, medium and large boxes offer the best balance of capacity and usability. Fitment and hatch clearance usually matter more than maximum cubic feet.
The goal is choosing a setup that adds storage without adding unnecessary size or complexity.
Recommended products:
Related Guides
• What Size Cargo Box Fits a Forester?
Leave a Reply