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If you drive a Scion xD and need more space for luggage, sports gear, or weekend supplies, a rooftop cargo box can transform your vehicle into a more versatile hauler. Picking the right box matters because size, mounting system, and aerodynamics affect handling, fuel economy, and how much you can carry safely. This guide shortlists the top options suited to the Scion xD and explains the evaluation criteria we used, including capacity, mounting compatibility, durability, and user-friendly installation. Read on to see the top picks and practical buying considerations before you choose.
Looking for other parts? See all Scion xD parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Goplus 14 cu ft Hard-Shell Rooftop Cargo Box |  |
| Best Quality Built to a higher standard if you want something more solid | VISRACK Hard-Shell Roof Cargo Box, 15.5 cu ft, Dual-Side Opening |  |
| Best Budget The cheapest option that still gets the job done reliably | QUAWIP 13 cu ft Hard-Shell Rooftop Cargo Box (Tool-Free Install) |  |
| Most Sold A high-volume bestseller chosen again and again | Yakima SkyBox NX 18 Roof-Top Cargo Box |  |
| Best Value for Money The sweet spot between price and what you get | GarveeTech Hard-Shell Rooftop Cargo Box, Dual-Side Opening, 12 cu ft |  |
| Best Overall The best all-around choice for most situations | Perflex Exclusive 17.7 cu ft Hard-Shell Rooftop Cargo Box |  |
1. Goplus 14 cu ft Hard-Shell Rooftop Cargo Box
| Volume | 14 Cubic Feet |
|---|---|
| Load Capacity | 165 lbs |
| Material | ABS and PC |
| Mounting Type | Roof Mount |
| Water Resistance Level | Waterproof |
The Goplus 14 cu ft hard-shell rooftop cargo box gives a practical way to expand cargo space on a Scion xD by mounting to the vehicle’s crossbars. It mounts with four quick-connect anchors and fits crossbars 17 to 22.8 inches wide, providing a waterproof shell made from ABS and PC that resists rain and road spray. Dual-side opening makes loading and unloading easier depending on which side of the car you are working from, and the metal lid stiffeners and double-lock system aim to keep contents secure during long drives. In real-world use it is lightweight enough for one person to lift onto the roof and stores an extra set of luggage or soft gear without intruding on passenger space. Limitations to consider are the mostly plastic locking hardware and a relatively thin lid that reviewers say feels less robust than premium-brand boxes, plus mounting claws that may need adjustment for some bar profiles. If you prioritize straightforward, weatherproof cargo capacity for occasional trips on a Scion xD, this box performs well for the price but trades some long-term durability and lock refinement compared with higher-end options.
Best for: Reliability-focused buyers who want a straightforward, weatherproof way to increase cargo space on a Scion xD for road trips and weekend gear without complex installation or frequent tinkering.
Less Ideal for: Those who need the most rugged construction, heavy-duty metal locks, or a high-end box intended for daily heavy use should consider premium alternatives instead.
- Waterproof hard-shell construction protects gear from rain and road spray.
- Dual-side opening for convenient access from either side of the vehicle.
- Lightweight design that one person can lift and install onto crossbars.
- Fits common crossbar widths and uses quick-connect anchors for faster installation.
- Locking components and internal lock mechanisms are mostly plastic and feel less secure than metal alternatives.
- Top lid is relatively thin and can flex more than premium boxes under heavy pressure or heat.
- Mounting claws may not seat perfectly on every bar profile and can require modification for a tighter fit.
Verdict A cost-effective, weatherproof cargo box that adds usable storage to a Scion xD but sacrifices some lock and lid robustness compared with premium models.
2. VISRACK Hard-Shell Roof Cargo Box, 15.5 cu ft, Dual-Side Opening
| Water Resistance Level | Waterproof |
|---|---|
| Mounting Type | Roof Mount |
| Item Volume | 15.5 Cubic Feet |
| Shell Type | Hard |
| Automotive Fit Type | Universal Fit |
This VISRACK hard-shell roof cargo box provides 15.5 cubic feet of weatherproof rooftop storage and mounts to crossbars for secure transport on a vehicle roof. It is built from ABS/PMMA materials and includes a keyed lock, mounting brackets, and a tool-free style installation that fits most roof rails and crossbars. The dual-side opening makes loading bulky items easier from either side of the car, and the box stays locked until the cover is fully closed which reduces the chance of driving off with it open. Practical benefits for long trips include a sleek aerodynamic profile that minimizes extra wind noise and reports of reliable waterproofing during heavy rain. Limitations to consider are its need to be removed for some automatic car washes and the roughly 130 lb load limit, which constrains very heavy cargo; the mounting hardware uses U-bolt style fittings that some users find less refined than premium branded systems. For a performance-oriented buyer seeking quality storage without a large weight penalty, this box balances capacity, weather protection, and aerodynamic efficiency for road trips and gear-hauling on a Scion xD.
Best for: Performance-oriented buyers who prioritize aerodynamic efficiency and reliable weatherproof storage for frequent road trips and weekend gear hauling on a Scion xD.
Less Ideal for: Buyers who need to carry very heavy loads, want the fastest possible installation system, or who rely on automated roof-first car washes that cannot accommodate removable boxes.
- Large 15.5 cu ft capacity expands cargo space for long trips
- Waterproof hard-shell construction protects gear in heavy rain
- Dual-side opening for easier loading and unloading from either side
- Includes keyed security lock and mounting brackets for a complete kit
- Mounting uses U-bolt style hardware which can be more cumbersome than premium clamp systems
- 130 lb load capacity limits very heavy items and distributes load on the roof
Verdict Solid, aerodynamic 15.5 cu ft rooftop cargo box that adds weatherproof storage and dual-side access for performance-minded Scion xD drivers, at the cost of heavier-duty mounting hardware and a 130 lb limit.
3. QUAWIP 13 cu ft Hard-Shell Rooftop Cargo Box (Tool-Free Install)
| Mounting Type | Roof Mount |
|---|---|
| Item Volume | 13 Cubic Feet |
| Shell Type | Hard |
| Automotive Fit Type | Universal Fit |
This QUAWIP hard-shell rooftop cargo box adds about 13 cubic feet of secure, weather-resistant storage to a Scion xD using common crossbars. It mounts without tools to most roof racks and opens from the passenger side with a support arm that keeps the lid open while you load. Made from impact-resistant ABS, the box is designed to resist the elements and includes a locking mechanism with keys so luggage and gear stay secure on trips. Practical advantages for the Scion xD include light weight for easier installation and a compact footprint that still accommodates soft bags or a couple of medium suitcases without blocking the rear hatch or sunroof area on smaller wagons. Limitations to expect are modest internal volume compared with larger boxes and a listed 130 lb load limit that you should not exceed; tall or awkward items may be hard to fit through the side opening. Installation may require two people to position the box safely on the car and confirm clamp alignment.
Best for: Budget-conscious Scion xD owners who want an affordable, factory-quality replacement-style roof box for occasional road trips and weekend gear hauls.
Less Ideal for: Those who need maximum cargo volume, frequent heavy hauling, or transport of long awkward items should consider larger or specialized carriers instead.
- Tool-free installation hardware for quick mounting to standard crossbars
- Hard ABS shell and waterproof construction protect gear from weather and road debris
- Passenger-side opening with support arm makes loading and unloading easier
- Secure multi-point lock where key is removable only when fully closed
- 13 cu ft capacity is limited for larger families or long trips
- May require two people to lift and position safely onto the roof
- Not suitable for very long or oversized items due to side opening and internal shape
Verdict A cost-conscious, weather-resistant hard-shell box that gives the Scion xD useful extra storage without the complexity or cost of larger cargo systems.
4. Yakima SkyBox NX 18 Roof-Top Cargo Box
| Volume | 18 Cubic Feet |
|---|---|
| Mounting Type | Roof Mount |
| Shell Type | Hard |
| Water Resistance Level | Not Water Resistant |
The Yakima SkyBox NX 18 is a hard-shell rooftop cargo box designed to add substantial secure storage to a vehicle roof. It mounts to crossbars and provides 18 cubic feet of usable volume, making it suitable for skis, snowboards, luggage, or camping gear. Key user-facing features include dual-sided opening for easier loading from either side of the car and a full metal handle with integrated locking hardware to keep contents and the box secured to the vehicle. The box sits relatively low on crossbars to reduce wind noise and has a flattened interior floor for easier packing. In practical use it requires two people to lift and position on the roof, and the large footprint can limit rear hatch clearance on compact vehicles. The shell is plastic with Yakimaactory mounting clamps and is not rated as water resistant, so items should be packed in dry bags for extended wet exposure. For Scion xD owners with a proper roof rack and attention to rear clearance, this SkyBox offers roomy, secure hauling with premium fit-and-finish at the expense of added bulk on a small hatchback.
Best for: Risk-averse mainstream buyers who prioritize durable, factory-quality accessories and want a reliable, roomy rooftop solution for occasional family trips and weekend gear hauling.
Less Ideal for: Drivers who mainly need a compact or temporary cargo solution or those who cannot accommodate a long box without obstructing their rear hatch should consider smaller or soft-sided alternatives.
- Spacious 18 cubic-foot capacity fits skis and multiple suitcases
- Dual-sided opening makes loading and unloading easier on tight parking spaces
- Integrated metal handle and locking hardware secure gear and deter theft
- Low-profile mounting reduces wind noise compared with taller boxes
- Flattened interior floor simplifies packing and keeps items stable
- Large length may restrict rear hatch opening on small hatchbacks
- Not specified as water resistant so moisture protection depends on packing
- Requires two people to lift and install due to bulky size
Verdict A roomy, well-built rooftop box that delivers secure, low-noise storage for cautious buyers but may be too long for tight-hatch vehicles like the Scion xD.
5. GarveeTech Hard-Shell Rooftop Cargo Box, Dual-Side Opening, 12 cu ft
| Volume | 12 Cubic Feet |
|---|---|
| Material Type | ABS |
| Mounting Type | Roof Mount |
| Water Resistance Level | Waterproof |
| Maximum Load Capacity | 165 lbs |
The GarveeTech hard-shell rooftop cargo box adds a compact, aerodynamic luggage carrier to a Scion xD with factory crossbars. It mounts to roof rails and provides 12 cubic feet of sealed, weatherproof storage for weekend gear or grocery overflow. The dual-side opening and included keys make loading from either side convenient when parked curbside, and the quick clamp-style attachment is designed for fast installation and removal. The ABS shell is described as waterproof and UV resistant, which helps protect luggage and keeps wind noise low thanks to the low-profile shape. Practical buyers will appreciate the 165 lb capacity for bulky items and the factory-style appearance once installed. Limitations to note are mixed reports about latch and lock longevity and occasional fit issues where the pre-cut mounting slots may not align with every crossbar configuration, which could require minor modification or careful fit verification before purchase. Instruction clarity varies between units.
Best for: Practical optimizers looking to add reliable, cost-conscious cargo space to their Scion xD for weekend trips and daily hauling without paying for premium brand markup.
Less Ideal for: Buyers who need very large capacity or who want heavy-duty metal locks and guaranteed fit on nonstandard roof bars should consider other solutions or verify fitment carefully.
- Dual-side opening allows easy access from either side of the vehicle.
- Waterproof, UV-resistant ABS shell protects cargo in wet or sunny conditions.
- Low-profile aerodynamic design reduces wind noise and helps fuel efficiency.
- Quick clamp-style mount for faster install and removal without professional tools.
- Some users report plastic lock components that can fail or feel less durable than metal locks.
- Pre-cut mounting slots may not align with every crossbar layout, requiring verification or modification.
- Instructions are sometimes unclear which can complicate first-time installation.
Verdict A budget-friendly, low-profile hard-shell box that gives Scion xD owners useful extra storage with practical features, provided you confirm fit and accept some compromises on lock hardware.
6. Perflex Exclusive 17.7 cu ft Hard-Shell Rooftop Cargo Box
| Item Volume | 500 Liters |
|---|---|
| Mounting Type | Roof Mount |
| Shell Type | Hard |
| Water Resistance Level | Waterproof |
| Weight Capacity | 130 Lbs |
The Perflex Exclusive is a hard-shell rooftop cargo box designed to add substantial weather-resistant storage to a vehicle with roof crossbars. It holds roughly 17.7 cubic feet (500 L) and supports up to 130 pounds, making it suitable for skis, snowboards, duffel bags, and weekend luggage. Installation is tool-free and the universal mounting hardware fits standard roof racks, while the dual-side opening speeds loading and unloading without crawling around the car. The central locking system and included keys help keep contents secure, and the ABS shell is UV and impact resistant for long-term outdoor use. In practice you get a roomy, aerodynamic carrier that reduces wind noise compared with soft bags and keeps gear dry in rain. Limitations to note are that one side-opening mechanism has been reported to fail on some units and replacement parts or support may be required, and the box adds wind resistance and some weight on the roof which can affect handling and fuel economy. For a Scion xD the box delivers clear cargo capacity gains but you must confirm your roof rack crossbars can support the box weight and loading pattern before use.
Best for: Balanced, all-round buyers who want a reliable way to expand cargo space for occasional road trips and outdoor gear without specialized gear or installation hassle.
Less Ideal for: Not the best choice for drivers who need a permanent, ultra-low-drag solution or those without a rated roof rack and crossbars on their Scion xD.
- Large 17.7 cu ft (500 L) capacity accommodates skis, snowboards and multiple suitcases.
- Dual-side opening for easier loading and unloading from either side of the vehicle.
- Tool-free universal mounting system simplifies installation and removal on vehicles with roof crossbars.
- Weather-resistant, locking design with multiple keys improves security and protects contents from rain and UV exposure.
- Some users reported failure of one side opening mechanism requiring replacement parts or service.
- Adds roof-mounted weight and aerodynamic drag that can slightly affect handling and fuel economy.
Verdict A roomy, weather-resistant hard-shell box that adds practical cargo space for a Scion xD but requires a compatible roof rack and occasional attention to the opening hardware.
Choosing the Right Scion xD Rooftop Cargo Box: Key Factors to Consider
Capacity and Internal Volume
Capacity, usually given in liters, determines how much gear you can carry and whether the box will handle luggage for a weekend or extended trip. Consider not only the total liters but the usable internal shape, since tall seams or tapered ends can limit which items fit.
Think about how you pack: if you often transport bulky duffels or suitcases, prioritize boxes with a wider, flatter floor. Also check the stated weight limit that your vehicle roof and crossbars can handle, because a high-volume box filled to capacity can easily exceed safe load limits.
Mounting Compatibility and Fit
Mounting style matters for safety and convenience. Look for fixings that match standard crossbar profiles and clamp securely without requiring complex adapters. Quick-release mounts or tool-free tightening save time and reduce the chance of installation error.
Because the Scion xD is a compact hatchback, low-profile boxes that sit close to the roof reduce wind noise and visual bulk. Verify the box clamps clear your crossbar width and that there is adequate roof-to-box clearance for hatch operation when the car is loaded.
Aerodynamics and Fuel Efficiency
A box with a streamlined shape cuts wind resistance and helps limit the fuel penalty and wind noise during highway driving. Aerodynamic profiles are especially important for frequent long-distance trips where small differences in drag compound into higher fuel use.
Consider the tradeoff between a sleeker, lower-volume design and a taller, higher-capacity box. If you mostly carry light, bulky items, the more aerodynamic option may be preferable; if you need maximum volume occasionally, a higher, less-streamlined box could make sense.
Durability and Weather Resistance
Shell construction affects how well the box stands up to sun, rain, and road debris. Rigid, UV-stabilized plastics resist cracking and fading, while reinforced edges and rivet-free mounting points tend to last longer under repeated loading.
Check that seals and gaskets are continuous and compress well to keep out water and dust. Corrosion-resistant hardware and theft-deterrent locks also contribute to long-term reliability and security for stored gear.
Access, Loading, and Convenience
Ease of loading affects everyday usability. Dual-side opening makes it easier to load from either side of the car, while top-only lids can be awkward in tight parking spots. Consider lid assist features such as gas struts or counterbalances that hold the lid open while you stow items.
Internal organization options such as tie-down points, molded shapes, or removable dividers help keep cargo from shifting. Think about how often you will remove the box; lighter units and simple release mechanisms reduce the hassle of seasonal or occasional use.
Security and Locking
A reliable locking system discourages theft and prevents accidental opening while driving. Look for locks integrated into the lid and resistant to forced entry, with keys that are easy to manage and replace if needed.
Consider whether the lock is accessible when the box is mounted and whether replacement keys or rekeying options exist. Even the best locks are a deterrent rather than an absolute guarantee, so pairing good locking with cautious parking is wise.
FAQ
Will a rooftop cargo box affect my Scion xD’s fuel economy?
Yes, adding a rooftop cargo box usually increases aerodynamic drag and can reduce fuel efficiency somewhat, especially at highway speeds. Sleeker, lower-profile models tend to have a smaller impact. The overall effect depends on driving speed and how full the box is.
How do I know if a cargo box will fit my roof rack?
Check the box manufacturer’s specifications for compatible crossbar spacing and maximum bar width. Measure your crossbars and compare clamp range and clearance requirements. Many boxes list the required distance between bars and the clamp aperture, which helps confirm fit before purchase.
Can I leave a cargo box mounted year-round?
You can leave a box mounted for extended periods, but doing so may increase wind noise and fuel use. Exposure to sun and weather can also accelerate wear on seals and plastics. If you do keep it mounted, periodically inspect mounting hardware and seals for wear or loosening.
What weight limits should I watch for when loading the roof box?
Observe both the cargo box’s stated load limit and your vehicle’s roof and crossbar weight ratings. The lower of these limits is the safe maximum. Overloading can affect handling, strain the mounting points, and risk damage to the roof or crossbars.
Are hard shell boxes better than soft ones?
Hard shell boxes generally offer superior weather protection, security, and longevity compared with soft bags, and they resist compression and abrasion better. Soft options can be lighter and easier to store when not in use, so the best choice depends on your priorities for security versus convenience.
How We Chose the Best Scion xD Rooftop Cargo Box
We focused on products that fit compact hatchbacks like the Scion xD and prioritized attributes that matter in everyday use. Key criteria included mounting compatibility with low-profile crossbars, measured cargo capacity in liters, and secure clamping or quick-release systems that minimize installation time. We also evaluated shell construction for weather resistance and impact durability, plus aerodynamic profile and weight distribution to limit drag and preserve handling. Practical considerations such as ease of getting gear in and out, locking mechanisms for theft deterrence, and clear weight limits were also part of the decision process. We excluded inflatable and soft-sided solutions, rooftop tents, and carriers designed solely for specialty loads such as bikes or skis. Our shortlist emphasizes widely applicable roof boxes that work with typical crossbar setups and provide a balance of capacity, durability, and straightforward installation.
Our full evaluation process is outlined in our review methodology.
Conclusion
Choosing the right rooftop cargo box for a Scion xD means balancing capacity with fit and aerodynamics. Prioritize a box that matches your crossbar system, provides the usable internal volume you need, and has secure, easy-to-use mounting hardware. Remember the tradeoffs: larger boxes hold more but add drag and weight, while sleeker models minimize fuel impact but offer less space. Focus on installation clarity, weather resistance, and realistic weight limits to get the most reliable and practical solution for your trips.
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