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Last Updated: September 2026
Two INNO cargo boxes, two different philosophies. One is an 11 cubic foot wedge. The other is a 9 cubic foot square. Both open from either side, both lock, and both mount to aero or square bars. The gap between them is smaller than the spec sheets first suggest, and bigger than the cubic-foot numbers alone imply.
Here is what the published listing data actually supports, and where it runs out.
Quick Answer
Buy the INNO BRM660BK Wedge Cargo Box - 11 Cubic FT (Gloss Black) if raw volume is the deciding factor and you want a box whose listing specifically claims compatibility with round bars and most factory racks in addition to aero and square [S3]. Its 11 cubic foot rating is the larger of the two, and its listing highlights a track design meant to be slid forward or back for hatch clearance plus a better weather seal [S3].
Buy the INNO ROOF Box 320 Matte Black 9cu ft if you want the smaller footprint and the mounting story matters more than the last two cubic feet. Its listing rates it at 9 cu ft, describes a square design intended to carry more within a compact shell, claims the widest range to slide front for minimal risk of hatch contact, and names a Memory Mount System [S4].
Where they genuinely tie: dual side opening and a locking key system appear on both listings [S3][S4].
Full Comparison Table
| Feature | INNO BRM660BK Wedge Cargo Box - 11 Cubic FT (Gloss Black) | INNO ROOF Box 320 Matte Black 9cu ft |
|---|---|---|
| Stated capacity | 11 cubic feet [S3] | 9 cu ft [S4] |
| Finish | Gloss black [S3] | Rugged matte black [S4] |
| Shape | Wedge [S3] | Square design [S4] |
| Bar compatibility (as listed) | Aero, square, round, and most factory racks [S3] | Aero and square bars [S4] |
| Opening | Dual side opening [S3] | Dual side opening [S4] |
| Hatch clearance approach | Track design adjusts forward or back for hatch clearance [S3] | Widest range to slide front for minimal risk of hatch contact [S4] |
| Mounting system named | Not named in the supplied listing | Memory Mount System [S4] |
| Weather sealing claim | Track design stated to provide a better seal against bad weather [S3] | Not stated in the supplied listing |
| Locking | Safety lock; keys removable only once the box is fully closed [S3] | Safety key lock system [S4] |
| Country of manufacture | Not stated in the supplied listing | Made in Japan [S4] |
| Warranty | Limited lifetime [S3] | Limited lifetime [S4] |
| Buy | Check Price on Amazon | Check Price on Amazon |
Design & Build Quality
The shapes are the headline difference. The 660 is a wedge; the 320 is described as a square design that the listing frames as compact while still carrying more [S3][S4]. A wedge tapers, which usually means the usable interior is not evenly distributed front to back — long items load fine, but bulk near the nose is harder to use. A squarer box trades that taper for more uniform packing space. That is an inference from the shape language in each listing, not a measured comparison; neither listing supplied here states interior length, width, or height.
Finish is a straight preference call. Gloss black on the 660 [S3], rugged matte black on the 320 [S4]. Matte hides swirl marks better in general use; gloss reads more like factory paint. Nothing in the supplied data establishes a durability difference between the two finishes.
One fact only the 320 listing states: it is made in Japan [S4]. The supplied 660 record does not state a country of manufacture — that is a gap in the listing information here, not evidence that INNO builds it somewhere else.
Both carry a limited lifetime warranty per their listings [S3][S4]. That is a genuine tie, and it is worth more than most spec-sheet ties on a product that lives outdoors at highway speed.
Features & Functionality
Dual side opening appears on both listings [S3][S4]. Here is the thing: on a tall SUV or a lifted wagon, being able to work from the curb side instead of the traffic side is a real safety and convenience feature. Neither box makes you choose here.
Locking is where the wording diverges slightly. The 660 listing describes a safety lock that only lets you pull the keys out once the box has been closed all the way [S3]. That is a specific anti-mistake design — you cannot walk away with the keys and an unlatched lid. The 320 listing states a safety key lock system [S4] but the supplied record does not spell out the same key-retention behavior. Absence of that wording is not proof the 320 lacks it; it just is not stated in the listing information supplied here.
Mounting is the 320's strongest documented feature. The listing names a Memory Mount System and describes it as the easiest installation and use of any cargo box on the market [S4] — that superlative is INNO's marketing claim, not an independent finding, and nothing supplied here verifies it against competing boxes. The supplied listing does not explain what the system remembers or how it works, so treat the name as marketing wording rather than a documented mechanism.
The 660's answer to installation is a new track design that the listing says makes it simple to adjust forward or back for hatch clearance and provides a better seal to keep out bad weather [S3]. Note that the seal claim only appears on the 660 record.
Performance
Both listings address the same real-world failure mode: the rear hatch striking the box when you open it. The 660 uses a fore-aft track adjustment [S3]; the 320 claims the widest range to slide front for minimal risk of contact with the hatch [S4]. The 320's phrasing is comparative, but the supplied data does not identify what it is being compared against, so treat it as INNO's claim rather than a measured range.
Practically, both are trying to solve hatch clearance through adjustability rather than by forcing you to buy a shorter box. If your vehicle has an aggressively rising rear hatch, that adjustment range is the spec that decides whether the box works at all — and it is the one you should verify against your specific vehicle before ordering either.
Capacity is the cleanest performance split: 11 cubic feet versus 9 cu ft [S3][S4]. Two cubic feet is roughly the difference between fitting a fourth duffel or not. But volume is not the only constraint on a roof — your crossbar load rating and your vehicle's dynamic roof capacity both cap what you can actually carry, and neither listing supplied here states a box weight or a load limit. Check your vehicle manual for that number rather than assuming the bigger box is automatically usable.
Aerodynamics: nothing in the supplied listing information states a drag coefficient, noise figure, or fuel-economy impact for either box, so any claim that the wedge is quieter would be invention. The wedge profile is a shape, not a published measurement.
Price & Value
Both are current INNO cargo boxes with limited lifetime warranties [S3][S4]. Check current price on Amazon for both — pricing on roof boxes moves seasonally, and the value question genuinely flips depending on the gap on the day you buy.
The value logic is simple. If the two land close in price, the 660's extra two cubic feet and its broader stated rack compatibility (aero, square, round, and most factory racks [S3]) make it the better dollar-per-volume proposition. If the 320 is meaningfully cheaper, or your rack is aero or square anyway, its Memory Mount System and Japanese manufacture [S4] are real value on their own terms.
Which Should You Buy?
- You have round bars or a factory rack. The 660. Its listing names aero, square, round, and most factory racks [S3]; the supplied 320 listing states compatibility with aero and square bars [S4]. Confirm fitment with INNO before ordering either way.
- You need maximum volume for family road trips. The 660, at 11 cubic feet versus 9 cu ft [S3][S4].
- A named mounting system matters to you. The 320 is the only one of the two whose supplied listing names one, the Memory Mount System [S4]; the listing does not describe how it works.
- You park in a tight garage or under a low carport. Lean 320 — the smaller 9 cu ft square [S4] is the more conservative choice, though neither supplied listing states exterior height, so measure your clearance and confirm dimensions with INNO first.
- Weather sealing is your top worry. The 660 is the only one of the two whose supplied listing makes a sealing claim, tied to its track design [S3].
- You want a finish that hides scuffs. The 320's rugged matte black [S4] versus the 660's gloss [S3] — preference, not performance.
How We Research
This website does not perform hands-on testing. For this comparison, we pulled the Amazon Creators API verified product record for each ASIN on September 6, 2026, then read every published listing feature bullet for both boxes line by line and compared them field against field.
Where one listing states something the other does not — country of manufacture, a weather-seal claim, a named mount system — we say so and flag it as a gap in the supplied listing information rather than assuming the feature is absent. Marketing superlatives are attributed to INNO, not repeated as verified fact.
Final Verdict
More volume and fewer fitment questions is a strong default.
The INNO ROOF Box 320 Matte Black 9cu ft earns the pick for a narrower buyer: someone on aero or square bars whose listing-named Memory Mount System appeals, or who simply wants the smaller square shell and matte finish [S4]. The supplied listing calls the Memory Mount System "the easiest installation and use of any cargo box on the market" but does not describe what it remembers or how it behaves across repeated removal and refitting.
Honestly, neither is a mistake. They share dual side opening, key locks, and limited lifetime warranties [S3][S4]. The decision is volume and rack type versus footprint and mounting convenience.
Check Price on Amazon | Check Price on Amazon
Frequently Asked Questions
Two cubic feet. Neither supplied listing states exterior or interior dimensions, so the volume figures are the only size comparison the published data supports.
Do both INNO boxes open from both sides?
Yes. Dual side opening is listed for both the Wedge 660 and the Box 320 [S3][S4].
Will either box fit my factory roof rails?
The 660 listing states it fits aero, square, round, and most factory racks [S3]. The supplied 320 listing states compatibility with aero and square bars [S4]. "Most factory racks" is not "all," so verify your specific vehicle and bar type with INNO before purchasing.
Which box is less likely to hit my rear hatch?
Both address it, differently. The 660 uses a track design that slides forward or back for hatch clearance [S3]; the 320 claims the widest range to slide front for minimal risk of hatch contact [S4]. The supplied data does not state the actual adjustment range in inches for either, so this cannot be settled on published numbers.
What is the Memory Mount System on the INNO Box 320?
INNO's listing names it and describes it as the easiest installation and use of any cargo box on the market [S4]. That is the manufacturer's claim. The supplied listing information does not explain the mechanism in detail, and nothing here independently verifies the comparison to other brands.
Are these boxes lockable, and can you remove the key while unlocked?
Both list locks [S3][S4]. The 660 listing specifies a safety lock that only allows the keys to be pulled out once the box has been closed all the way [S3]. The 320 listing states a safety key lock system [S4] without describing that same key-retention behavior in the supplied record.
What warranty do these INNO cargo boxes carry?
Both listings state a limited lifetime warranty [S3][S4]. Warranty terms and claim procedures are set by INNO; check the current terms before buying.
Sources & Methodology
Nobody here bolted either of these boxes to a car. There is no lab behind this page, no highway loop, no stopwatch — what we did was pull the Amazon Creators API verified product record for ASIN B06VX9L59C and ASIN B084BJSXQ1 on September 6, 2026 and read every published listing feature bullet for both, then set the two feature sets side by side to find where they overlap, where they diverge, and where one listing simply says nothing.
For roof boxes, that kind of reading gets you further than it would for, say, a blender: capacity, bar compatibility, opening style, mounting hardware, locking behavior and warranty are all published specifications, and they cover most of what actually determines whether a box suits your vehicle. What it cannot tell you is noise at speed, real-world durability, or whether the lid clears your particular hatch — for those, check INNO's fitment guidance and your vehicle's roof load rating. General consumer safety and recall information for products sold in the US is published by the CPSC and consumer protection guidance by USA.gov.