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If you drive a Chrysler 300 and need more space for gear, a rooftop cargo box can free up interior room and make long trips more comfortable. Choosing the right cargo box matters because fit, mounting method, and usable volume affect everyday practicality and how you load items for travel. This guide shortlists top rooftop cargo boxes that fit the Chrysler 300 and focuses on capacity, mounting compatibility, and aerodynamic design. Read on to see our top picks and the criteria we used to evaluate them.
Looking for other parts? See all Chrysler 300 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 Carrier, 15.5 cu ft |  |
| Most Sold A high-volume bestseller chosen again and again | INNO 320 Rooftop Cargo Box — 9 cu ft Matte Black |  |
| Best Value for Money The sweet spot between price and what you get | GarveeTech 12 cu ft Hard-Shell Rooftop Cargo Box with Dual-Side Opening |  |
| Best Overall The best all-around choice for most situations | Perflex Exclusive Rooftop Cargo Box — 17.7 cu ft Hard-Shell Carrier |  |
1. Goplus 14 cu ft Hard-Shell Rooftop Cargo Box
| Volume | 14 Cubic Feet |
|---|---|
| Mounting Type | Roof Mount |
| Water Resistance Level | Waterproof |
| Shell Type | Hard |
| Compatible Crossbar Width | 17" to 22.8" |
This Goplus rooftop cargo box is a budget-friendly hard-shell carrier that increases trunk space by mounting to factory-style crossbars on a Chrysler 300. It holds everyday luggage and gear while keeping items dry thanks to a waterproof ABS/PC shell and metal lid stiffeners that add bottom rigidity. The box mounts with four quick-connect anchors and clamps to crossbars between 17 and 22.8 inches wide, and dual-side opening makes loading convenient from either side of the car. Practical benefits include a relatively light weight for one-person handling, a sleek aerodynamic shape that limits added wind noise, and a double-lock system for basic security. Limitations to consider are thin upper lid panels and plastic internal lock components that reviewers say feel less robust than higher-end boxes, plus mixed reports about customer support for replacement keys. Also the included mounting claws may need adjustment or aftermarket hardware to suit some bar profiles on the Chrysler 300.
Best for: Reliability-focused buyers who prioritize adding dependable, weatherproof cargo capacity to a Chrysler 300 without paying for premium brand pricing.
Less Ideal for: Drivers seeking the most durable, theft-resistant rooftop solution or those who want factory-level locking hardware and thicker lid construction should consider higher-end alternatives.
- Waterproof hard-shell construction protects cargo in rain and snow.
- Dual-side opening provides easier access to gear from either side of the car.
- Fits common crossbar widths used on many Chrysler 300 roof racks (17" to 22.8").
- Light enough for one person to lift and install without help.
- Top panel is relatively thin and can feel less impact-resistant than premium boxes.
- Locking components use plastic internals that reviewers found less durable.
- Manufacturer customer support has mixed reviews for replacement keys and service.
Verdict A practical, weatherproof 14 cu ft hard-shell box that adds reliable cargo space to a Chrysler 300 at a lower cost but with compromises in lid thickness and lock hardware.
2. VISRACK Hard-Shell Roof Cargo Box Carrier, 15.5 cu ft
| 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 is a large-capacity rooftop carrier designed to expand vehicle storage for long trips or gear-hauling. It mounts to crossbars and offers a 15.5 cubic foot interior with dual-side opening so you can load from either side of the car and reach bulky items more easily. The shell is weatherproof and uses keyed locks to secure contents, and reviewers report it resists heavy rain and stays closed in highway use. Installation uses the supplied tool-free mounting brackets and works with common roof bars, though first-time fitting can take longer until you learn the clamps. Practical benefits include a sleek aerodynamic profile that minimizes drag penalty compared with boxier solutions, anti-theft keyed closure, and wide interior clearance for bikes or luggage. Limitations are the need to remove the box for automatic car washes, the roughly 130 to 150 lb recommended load limit, and a mounting system that some users find less refined than premium-brand clamp systems.
Best for: Performance-oriented buyers who prioritize reliable, aerodynamic rooftop storage for long trips and regular gear-hauling on a Chrysler 300.
Less Ideal for: Drivers who need the fastest on-rack removal or the lightest possible mounting system, or who regularly carry exceptionally heavy loads.
- Waterproof hard-shell construction keeps gear dry during heavy rain
- Dual-side opening improves accessibility when parked on either side
- Keyed locking provides physical security for stored items
- Tool-free mounting brackets simplify installation on crossbars
- Aerodynamic shape reduces wind resistance compared with bulkier boxes
- Mounting hardware uses U-bolt style clamps that can be fiddly compared with premium quick-release systems
- Capacity and rated load (around 130–150 lb) limit very heavy cargo
- Must be removed before automatic car washes
Verdict A high-capacity, weatherproof hard-shell box that suits Chrysler 300 owners who want secure, aerodynamic extra storage for performance-minded road trips.
3. INNO 320 Rooftop Cargo Box — 9 cu ft Matte Black
| Mounting Type | Roof Mount |
|---|---|
| Item Volume | 9 Cubic Feet |
| Shell Type | Hard |
| Automotive Fit Type | Universal Fit |
| Included Components | BRM320MBK, Locks, Keys Incl |
The INNO 320 is a compact hard-shell cargo box designed to add 9 cubic feet of secure, weather-resistant storage to a vehicle’s roof. It installs with the Memory Mount clamp system that speeds attachment and removal from crossbars and lets you slide the box forward for better hatch clearance on sedans like the Chrysler 300. The dual-side opening and included locks let two people load from either side and secure gear during travel. Its low-profile matte finish reduces wind noise and minimizes fuel-economy impact compared with taller boxes, and reviewers report straightforward, tool-free installation. Limitations to consider are internal length for long items such as skis — very long gear may need to be angled or will not fit — and the compact volume means it is best for weekend luggage, groceries, or compact outdoor gear rather than full-family packing. If you plan to leave the box mounted year-round, expect slightly reduced garage clearance and take care measuring for your specific roof and garage.
Best for: A risk-averse mainstream buyer who prioritizes a discreet, factory-quality cargo solution for occasional trips and wants an easy, secure install that preserves the Chrysler 300’s appearance and drivability.
Less Ideal for: People who regularly carry long or bulky loads or need maximum roof capacity for family vacations should consider a larger or longer cargo box or a different cargo solution.
- Low-profile hard-shell design reduces wind noise and fuel drag compared with taller boxes.
- Memory Mount clamp system enables fast, tool-free installation and repeatable positioning.
- Dual-side opening with included locks allows convenient loading and added security.
- Compact 9 cu ft capacity is suitable for weekend luggage and small outdoor gear.
- Limited internal length can restrict very long items like full-size skis or long snowboards.
- 9 cu ft capacity may be too small for larger family trips or bulky equipment.
Verdict Choose the INNO 320 if you want a low-profile, easy-to-install 9 cu ft rooftop box that keeps wind noise and visual impact low on a Chrysler 300, but look elsewhere for long skis or big family loads.
4. GarveeTech 12 cu ft Hard-Shell Rooftop Cargo Box with Dual-Side Opening
| Volume | 12 Cubic Feet |
|---|---|
| Mounting Type | Roof Mount |
| Material Type | ABS |
| Water Resistance Level | Waterproof |
| Maximum Capacity | 165 lbs |
This GarveeTech hard-shell rooftop cargo box provides 12 cubic feet of additional storage and is built from ABS to resist water and UV exposure. It mounts to factory-style roof racks and is designed for travel use where extra luggage or gear is needed; the low, aerodynamic profile helps reduce wind noise and can improve highway stability compared with taller carriers. Key features are the dual-side opening for access from either side of the vehicle, a keyed lock system, and an integrated strap set for securing loads. Installation is straightforward on most crossbar systems and several buyers report quick single-person mounting. Limitations to note are mixed reports about the plastic lock components and occasional fitment issues on some factory crossbar designs, so you may need minor adjustments for perfect alignment. For Chrysler 300 owners verify your roof rack crossbar spacing and attachment method before purchase to ensure a clean fit.
Best for: Practical optimizers looking for a budget-friendly way to expand cargo capacity on a Chrysler 300 while keeping noise and drag low.
Less Ideal for: Drivers who need very large volume or heavy-duty locks and who prefer a premium branded carrier with metal hardware and guaranteed fitment without any adjustments.
- Hard ABS shell with waterproof and UV-resistant design protects gear in rain and sun.
- Dual-side opening makes loading and unloading easier from either side of the Chrysler 300.
- Low, aerodynamic profile reduces wind noise and helps highway stability compared with taller boxes.
- Quick-mount clamps fit standard crossbars for mostly tool-free installation and single-person handling.
- Some users report plastic lock hardware that can fail or feel less durable than metal locks.
- Pre-cut mounting points may not align with all factory crossbar layouts requiring minor modification.
Verdict A value-oriented, aerodynamic hard-shell box that gives Chrysler 300 owners practical extra storage and easy access, but check rack fitment and be aware the locks are plastic.
5. Perflex Exclusive Rooftop Cargo Box — 17.7 cu ft Hard-Shell Carrier
| Mounting Type | Roof Mount |
|---|---|
| Item Volume | 500 Liters |
| Shell Type | Hard |
| Automotive Fit Type | Universal Fit |
The Perflex Exclusive is a hard-shell rooftop cargo box that adds substantial weather-resistant storage for a Chrysler 300 equipped with roof crossbars. Its 17.7 cu ft (500 L) capacity and 130 lb load rating make it suitable for luggage, skis, or camping gear, and dual-side opening simplifies loading when the vehicle is parked on either side. The box arrives fully assembled and uses a claimed tool-free mounting system that attaches to factory-style crossbars, and the central lock prevents key removal until the lid is closed which helps keep contents secure. Construction uses UV- and impact-resistant ABS, which keeps the shell light yet stiff and helps resist fading. Practical benefits for Chrysler 300 owners include increased cargo space without sacrificing interior room and easier access to long items thanks to the side openings. Some buyers report occasional latch or one-side opening issues, so check closures carefully after installation and expect to rely on customer support if parts fail. The box does add height and some wind noise and will affect fuel economy at highway speeds.
Best for: Balanced buyers who want a roomy, secure rooftop box to expand cargo for weekend trips and seasonal gear without fuss or complex installation.
Less Ideal for: Those who need an ultra-low-profile carrier for tight clearances or buyers unwilling to monitor and occasionally service latches or locking hardware.
- Large 17.7 cu ft capacity accommodates skis, snowboards, and multiple suitcases
- Dual-side opening for convenient loading from either side of the car
- Central locking system with multiple keys for improved security
- Weather-resistant, UV-resistant ABS shell resists impact and fading
- Ships fully assembled and uses a tool-free universal mount for crossbar attachment
- Some users report latch or one-side opening failures requiring replacement parts
- Adds vehicle roof height and increases wind noise and fuel consumption
Verdict A roomy, weather-resistant hard-shell box that suits Chrysler 300 owners wanting reliable extra cargo space, though buyers should check latches and expect increased roof height and wind noise.
Choosing the Right Chrysler 300 Rooftop Cargo Box: Key Factors to Consider
Capacity and Interior Shape
Capacity determines how much you can pack and is often listed in liters, but shape matters just as much. Long, narrow items like skis or fishing rods need length, while bulky items require wide, tall cavities. Consider usable internal dimensions rather than only the stated capacity in liters because awkward internal contours or recessed walls can limit what actually fits.
Also think about how you will pack the box. Dividers or tie-down points help keep items organized and prevent shifting. For families or extended trips, choose a larger capacity and a shape that matches the items you carry most often.
Mounting Compatibility and Installation
Confirm the box’s mounting system works with the Chrysler 300’s available crossbars or roof rails. Some boxes clamp to crossbars, others use U-bolts or T-slot hardware. Ease of installation matters if you plan to mount and remove the box regularly; look for simple, tool-free or single-tool fastening and clear instructions.
Also verify the maximum crossbar spacing and width the box supports, and whether adapters are needed for thicker aero bars. A secure, easy-to-install system reduces the risk of improper fit and makes seasonal use more convenient.
Aerodynamics and Wind Noise
Aerodynamic design reduces drag and wind noise, which improves fuel efficiency and cabin comfort on highway drives. Low-profile, tapered boxes tend to produce less resistance, while blunt or boxy shapes create more turbulence. Consider the box’s profile height and nose/tail shaping when evaluating noise and efficiency tradeoffs.
Materials and surface finish can also influence airflow. If you do a lot of highway driving, prioritize a streamlined box to minimize added drag and annoying wind sounds during long trips.
Build Quality and Weather Protection
Durable materials and reliable seals keep contents dry and protect against UV damage and road debris. Hard-shell constructions typically offer better impact resistance and rigid support for heavier loads. Check for reinforced lids, corrosion-resistant hardware, and quality rubber gaskets that form a tight seal around the lid.
Also consider warranty coverage and how well the box resists scratches and dents. Solid build quality reduces maintenance and prolongs usable life, especially when you store the box on the roof for extended periods.
Access and Usability
Think about how you will load and unload the box. Dual-side opening or lid assist features make access easier from either side of the vehicle and reduce frustration when parked on one side of the road. Internal tie-downs, non-slip surfaces, and lid supports help keep the box usable and safe during packing.
Height of the mounted box affects reachability. If you are often loading solo, features that aid single-person operation and secure latching will make the whole process quicker and less awkward.
Weight, Load Limits, and Vehicle Handling
Every rooftop box adds weight up high, which can affect vehicle handling and roof load capacity. Check the combined weight of the box and packed contents against the Chrysler 300’s roof load rating. Overloading can strain crossbars and negatively affect stability.
Also consider the empty weight of the box when assessing ease of installation and storage. Lighter boxes are easier to install, but very light construction can compromise durability, so balance weight with build quality.
FAQ
Will any rooftop cargo box fit my Chrysler 300?
Not all boxes will fit without checking dimensions and mounting compatibility. You should confirm the box’s internal length, width, and height against common items you plan to carry, and verify the mounting hardware works with the Chrysler 300’s crossbars or roof rails. Check the box’s recommended crossbar spacing and clamp design before buying.
How much weight can I put in a rooftop cargo box?
The safe load depends on both the cargo box’s maximum load and the Chrysler 300’s roof load rating. Usually the vehicle roof rating is the limiting factor. Include the box’s own weight when calculating total load, and avoid exceeding manufacturer specifications to maintain safe handling and avoid damage.
Is a hard shell roof box better than a soft bag?
Hard shell boxes generally offer better weather protection, theft resistance, and easier loading for rigid items. Soft bags can be lighter and cheaper, and they may compress for storage, but they typically provide less protection from impact and moisture. The best choice depends on how you use the box and what you need to protect.
Will a rooftop box increase wind noise or reduce fuel economy?
Adding a roof box can increase wind noise and affect fuel economy, especially if it has a tall or boxy profile. Streamlined, low-profile boxes tend to produce less noise and lower aerodynamic penalty. Choosing a more aerodynamic shape can reduce the impact during highway driving.
How do I secure items inside the roof box?
Use internal tie-down points, straps, and padding to prevent items from shifting. Place heavier items low and centered and distribute weight evenly along the length of the box. Many boxes include anchor points or accessory straps; use those to stabilize loads and protect gear.
How We Chose the Best Chrysler 300 Rooftop Cargo Box
We started with boxes that meet common Chrysler 300 roof dimensions and crosschecked mounting systems to ensure secure attachment to factory or aftermarket crossbars. Key evaluation criteria included usable capacity in liters to reflect realistic packing space, mounting hardware and ease of installation, aerodynamic profile to reduce wind noise and drag, build materials and weather sealing for durability, and weight limits to keep handling safe. We prioritized boxes with clear dimensions and straightforward installation guidance so you can assess fit before buying. Exclusions: we excluded soft bags, items without verifiable capacity or mounting specs, and boxes that lack adequate weather protection or clear crossbar compatibility. The resulting list focuses on durable, reasonably aerodynamically shaped rooftop cargo boxes that offer reliable mounting options and practical interior volume for road use.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a rooftop cargo box for a Chrysler 300, prioritize fit, mounting compatibility, and usable interior volume. Balance capacity in liters with internal shape so the box accommodates the items you actually carry most often. Also weigh installation ease, aerodynamic profile, and build quality against how frequently you will use the box. Careful attention to these tradeoffs ensures a comfortable, secure way to expand storage for road trips and everyday hauling.
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