A volume in litres, and a plate that is sold separately
A top box is bought on a number of litres and lives or dies on what holds it to the machine. That is the first thing to settle: a mounting plate is almost always a separate purchase, it is specific to the box maker, and the plate then needs a rack or a fitting kit specific to the machine. Three parts, three references, and a listing that quotes only the box has quoted about half the price. Two systems dominate and are not interchangeable, so the plate decides which boxes can ever be fitted afterwards. Then the published figures, which are unusually honest in this family because they are structural. Capacity in litres, which is measured differently enough between makers that the useful test is the one people actually apply: whether a full-face helmet fits, and which one, since a large adventure helmet is a very different object from a compact jet. Maximum load is genuinely limiting — a top box sits at the end of a lever behind the rear axle — and it is the figure this family withholds: every box on this page leaves its load limit blank, and every one leaves its own weight blank too. The opening direction, top-hinged or side-hinged, which decides whether the box can be opened with a pillion in place. Locking, and whether the box lock can be keyed to the ignition, which most makers offer and few listings mention. And the backrest, a common accessory that changes how a pillion sits. We compare capacity, mounting system and plate, helmet fit, opening direction, locking and keying, and backrest availability.
45 L · ABS+PP · lockable with 2 keys · integrated brake light
A 45-litre lockable top case in reinforced ABS+PP, supplied with a universal mounting plate, two keys and an integrated brake light.
Best for: A commuter who needs a helmet to live on the bike rather than in an office.
≈ €33
48 L · ABS · two helmets · extra-large reflector · lock with 2 keys
A 48-litre lockable ABS top case published to take two helmets, with an extra-large reflector for low light and a matt black surface described as easy to clean.
Best for: A scooter or moped commuter who wants a box that also suits a quad.
≈ £42 / €45
52 L · ABS · four-season construction · secure storage for helmets
A 52-litre ABS top case published for helmets and gear across all four seasons, with the listing describing quality and compatibility in general terms rather than by figure.
Best for: A buyer who wants volume and a named material and will discover the rest on arrival.
≈ €84
52 L · fits two helmets · quick-mount system · 60 cm integrated reflector
A 52-litre top case published to take two motorcycle helmets, with a quick-mount system, anti-theft locking and a 60 cm integrated reflector.
Best for: A rider who carries a pillion and wants both helmets to stay with the bike.
≈ €45
65 L · 1.5 mm aluminium alloy · 565 × 500 × 380 mm · 25 mounting holes · backrest pad
A 65-litre aluminium alloy top case with a 1.5 mm wall, published dimensions of 565 × 500 × 380 mm, leather lining, a base with 25 mounting holes and a backrest pad.
Best for: Touring with luggage that has to survive being strapped down and rained on.
≈ $138 / €132
Only the specifications at least four models out of five state. A column that is more empty than full compares nothing.
| Model | Price | Amazon reference | Capacity | Load limit | Material |
|---|---|---|---|---|---|
| GarveeMore 45L Universal | 33 € | B0H6PTP94Z (one reference across 4 Amazon marketplaces) | 45 litres — stated to hold a full-face helmet, rain gear, gloves and tools (maker’s bullet) | The maker puts nothing in writing on this. | Reinforced ABS+PP, described as impact-resistant and weather-resistant (maker’s bullet) |
| tectake 401481 | 42 € | B00ZRSBALS (one reference across 5 Amazon marketplaces) | 48 litres, stated to take two helmets (from the title) | The maker puts nothing in writing on this. | ABS, matt black, described as stable and durable (maker’s bullet) |
| Götz Topcase XXL | 45 € | B0CM1GGPJP (one reference across 5 Amazon marketplaces) | 52 litres — stated to take two motorcycle helmets plus rain gear and shopping (maker’s bullet) | The maker puts nothing in writing on this. | Matt black plastic, described as easy to care for (maker’s bullet) |
| BREMER SITZBEZÜGE Top Case 52 L | 84 € | B0DHPF54NH (one reference across 6 Amazon marketplaces) | 52 litres (from the title) | The maker puts nothing in writing on this. | ABS, described as high quality and durable (maker’s bullet) |
| VEVOR Top Case 65L | 138 € | B0DSDCR16Z (one reference across 6 Amazon marketplaces) | 65 litres — stated to take two full-face helmets, a complete riding suit and several days’ luggage (maker’s bullet) | The maker puts nothing in writing on this. | 1.5 mm aluminium alloy, described as wear- and fall-resistant, with shock absorbers at each corner (maker’s bullet) |
Specifications: manufacturer sheets and Amazon product pages. Prices and availability: Keepa. No product on this site has been physically tested.
Most recent revision in this category: September 18, 2026.
Nothing written into the text below is a current price. Where an amount appears in a sentence, it is the reading taken on the day that sentence was written; what a shop is asking at this moment loads beside the product itself, and that is the figure to go by.
