If you ride long trips or simply need substantial storage, an extra large motorcycle trunk can be a game changer. These cargo boxes provide high capacity, weather resistance, and security to keep tools, gear, and belongings safe on the road. This guide highlights five top picks that suit riders seeking big storage, universal compatibility, and durable construction. It also helps identify who benefits most from each option—whether you’re a touring rider, a commuter, or a sport-bike enthusiast.
Overview at a glance: the following table summarizes five popular extra large trunks, their approximate capacity, and standout features. This quick reference helps you compare at a glance before diving into full product details.
| Product | Approx. Capacity | Key Benefit |
|---|---|---|
| ECOTRIC 50L Motorcycle Trunk | 50L | Solid everyday use; good for bikes with backrest compatibility |
| Letusto GRUNT SPORTS 65L | 65L | Large capacity with weather-resistant aluminum and back cushion |
| Rhinowalk 80L Tail Bag | 80L | Expandable, all-weather with helmet rain cover |
| Motorcycle Top Box 100L | 100L | Highest capacity in this list; multiple sizes available |
| KUAFU 50L Trunk with Backrest | 50L | Strong mounting hardware; backrest and tail light |
ECOTRIC 50L Motorcycle Trunk With Top Rack
This 50L trunk targets riders who want solid storage without excessive bulk. The 50L capacity is ample for essential gear, tools, or a change of clothes, and the top rack adds versatility for securing additional items. It’s a practical choice for daily commuters and weekend riders who need reliable protection and a straightforward mounting process.
Best for: daily commuters and riders who value a balance between capacity and ease of installation. It’s a solid option when you want a universal fit with a backrest-ready design.
Limitation: The 50L size may feel cramped for very long tours requiring bulkier gear. Verify your mounting hardware compatibility with your motorcycle model before purchase.
Letusto GRUNT SPORTS 65L Tail Box
This 65L trunk is ideal for riders who regularly carry extra gear, helmets, and clothing on longer trips. The aluminum construction offers durability with weather resistance. The included back cushion supports rider comfort when using the tail box as a backrest or when loading heavy items.
Best for: touring riders and those who need more than 50L but still want a compact footprint compared to largest capacity trunks. It’s a middle-ground choice that emphasizes security and weather sealing.
Limitation: Aluminum construction requires periodic checks for any mounting looseness after rough roads. Ensure the securing hardware remains tight after long rides.
Rhinowalk Expandable 80L Tail Bag
The Rhinowalk 80L trunk is designed for riders who require the most capacity without switching to a top-case style box. It’s expandable to accommodate large loads and includes weatherproofing features like an all-weather shell and a helmet rain cover. The bag connects with sissy bar straps for secure mounting.
Best for: riders who prioritize maximum capacity and flexible loading, such as long-haul travelers or those who trailer additional gear on a supported trip. Choose this if you want a trunk that can grow with your luggage needs.
Limitation: As a soft bag, it may not offer the same rigid protection as hard-shell trunks under heavy impacts. Check your mounting setup and strap tension on rough roads.
Motorcycle Top Box 100L (Hard Shell)
This 100L hard-shell top box emphasizes maximum capacity and robust protection. The aluminum alloy outer shell is described as shatterproof and wear-resistant with reliable sealing. It also features a reflective warning sticker to enhance night visibility and a multi-level water and dust protection system for harsh environments.
Best for: riders who need the highest storage capacity and a protective, rugged casing for luggage in dusty or wet conditions. It’s a strong choice for extended tours or trips with substantial gear and equipment.
Limitation: The larger size may require more clearance and could be less maneuverable in tight spaces. Confirm mounting compatibility and space requirements with your bike before purchasing.
KUAFU 50L Trunk With Backrest
The KUAFU 50L trunk pairs a compact 50L capacity with a built-in backrest and tail light. The hard shell is designed for secure storage and improved rider visibility at night. It includes mounting hardware to facilitate quick installation on compatible motorcycles.
Best for: riders who want a lighter, easier-to-manage trunk with comfort features and integrated lighting. It’s a good pick for day trips or moderate touring where space matters but comfort is a priority.
Limitation: 50L may not satisfy very gear-heavy trips; consider larger options if you plan frequent full-load journeys or bulky equipment.
Buying Guide: Key Purchase Considerations
What size fits your riding style? If you frequently carry bulky items or multiple days of gear, prioritize trunks in the 65–100L range. For daily commuting, a 50L trunk can be sufficient while keeping weight and wind resistance manageable.
Hard shell vs. soft bag—what suits your needs? Rigid hard-shell trunks offer superior protection and security and are easier to load on rocky terrain. Soft bags can be lighter, flexible, and expandable, but may provide less protection in a tip-over or heavy impact.
Mounting compatibility and security matter. Check whether the trunk includes mounting hardware and whether it suits your bike model. Look for anti-theft features and weather sealing to protect luggage in rain or dust.
Weather resistance and visibility. Trunks with weather seals, reflective stickers, and sealed latches reduce water ingress and improve rider visibility at night. Consider whether your typical routes involve dusty deserts or frequent rain.
One or multiple features. Decide if you need a backrest, integrated lighting, or a rack for extra items. A backrest can improve comfort on longer rides, while built-in lights boost safety during night travel.
Frequently Asked Questions
- What size trunk should I choose for weekend trips? A trunk in the 50–65L range often balances capacity and handling for weekend trips, while larger 80–100L trunks suit longer tours with more gear.
- Are hard-shell trunks safer than soft bags? Yes, hard-shell trunks provide rigid protection against impacts and weather, whereas soft bags are more flexible and may be lighter.
- Do trunks require special mounting hardware? Many trunks include mounting hardware designed for universal fit, but always verify compatibility with your motorcycle model and mounting rack.
- Can trunks be used with backrests? Some models include backrests or are compatible with backrest accessories; check product descriptions for compatibility with your seating setup.
- Is a trunk suitable for rain and dust? Look for multi-level waterproof seals and dustproof ratings to ensure protection in dusty or rainy environments.
- How do I secure a trunk on a bike with limited space? Choose a compact or mid-range trunk and use proper mounting brackets, straps, and alignment to prevent interference with exhausts, signals, or rider movement.