* Product Name: “Big Sofa” Style Universal Motorcycle Top Case with Backrest
* Product Description: The “Big Sofa” Style Universal Motorcycle Top Case with Backrest is a 2-in-1 multifunctional riding upgrade component custom-tailored for all categories of scooters and standard motorcycles. It directly addresses two core pain points: passenger fatigue during long-distance rides and insufficient factory-provided storage space. By seamlessly integrating an ergonomically comfortable backrest with a high-capacity storage compartment, it comprehensively upgrades both riding comfort and cargo-carrying capability. This accessory serves as a universal modification solution suitable for all scenarios—from daily commuting and suburban leisure to inter-city motorcycle touring and long-distance expeditions.
Product Specifications
Dimensions: 647 × 526 × 458 mm
Rated Capacity: 40L
Material: Industrial-grade, high-strength PE
Unlocking Mechanism: Dual-mode (Anti-theft combination lock + Backup mechanical key)
Installation: Universal, non-destructive quick-mount system
The “Big Sofa” Style Universal Top Case features an integrated design combining a comfortable backrest with high-capacity storage. Its optimal 40L capacity easily accommodates various items—including full-size full-face helmets, riding gear, and personal luggage—effectively resolving the issue of limited factory storage space and meeting the storage needs for both daily commutes and long-distance travel. A key upgrade to the case body is the “Big Sofa” ergonomic backrest: filled with high-density memory foam and wrapped in waterproof, abrasion-resistant leather, its diamond-patterned breathable structure contours to the natural curves of the lower back. This design evenly distributes back pressure, alleviates fatigue during long rides, and significantly enhances rear-seat passenger comfort, allowing you to say goodbye to the discomfort of traditional top cases digging into your back. Constructed from industrial-grade, high-strength PE material using a one-piece molding process, the lightweight design offers excellent resistance to scratches, impacts, and extreme temperatures; it resists deformation and aging even after prolonged use. The entire case body is encircled by a waterproof sealing strip, creating an IP65-rated dustproof and waterproof structure that keeps internal contents dry even during heavy rain—making it perfectly suited for the rainy climates of Southeast Asia and complex outdoor road conditions. The universal quick-mount base is compatible with the rear cargo racks of the vast majority of scooters and standard motorcycles on the market, requiring no drilling or modification to the vehicle body. Installation and removal can be completed in just minutes without damaging the vehicle’s original aesthetics. Once mounted, the unit remains firmly secured—free of wobbling or rattling—and does not compromise the vehicle’s driving stability. The locking mechanism features a dual-mode design, combining an anti-theft combination lock with a backup mechanical key; this allows for effortless opening and closing without the need to carry a physical key, striking an ideal balance between user convenience and security. The trunk body is designed to integrate with the vehicle’s original turn signals, significantly enhancing visibility and recognition during night riding. Furthermore, its optimized structural design provides cushioning protection in the event of a side-fall, thereby minimizing damage to the vehicle body. Distinguished by its dual core strengths—a large, comfortable backrest and ample storage capacity—this tail trunk offers universal compatibility across vehicle models, exceptional durability, ease of installation, and robust protection. Covering the full spectrum of riding scenarios, it stands as a highly cost-effective and superior aftermarket upgrade for enhancing your riding experience and expanding your cargo-carrying capabilities.

* Product Specifications (Compatible Models: Universal fit for all motorcycle types, including mainstream scooters and standard motorcycles such as the Honda FORZA NSS350, XMAX300, ADV350, etc.)
・Overall Dimensions: 647 × 526 × 458 mm
・Rated Capacity: 40L
・Case Material: Industrial-grade, high-strength PE
・Locking Mechanism: Dual-mode system featuring a combination anti-theft lock plus a backup mechanical key
・Installation Method: Universal, non-destructive quick-mount system; requires no drilling or vehicle modification
・Safety Features: Supports synchronized turn signal integration; features side-impact cushioning protection
・Core Features: Ergonomic “sofa-style” large backrest; universal compatibility across all motorcycle models; waterproof and dustproof; impact-resistant and wear-resistant; stable and rattle-free operation
Detailed Product Description
This product is a universal motorcycle top case featuring an ergonomic, “sofa-style” backrest. It integrates a comfortable, ergonomically designed backrest with a spacious 40L storage compartment. The oversized backrest—padded with high-density memory foam—significantly enhances passenger comfort during long-distance rides, effectively resolving the common issue of seating discomfort associated with traditional motorcycle top cases. Constructed from industrial-grade, high-strength PE material via a seamless molding process, the case is rugged and durable. It features a fully sealed, IP65-rated design that is both waterproof and dustproof, ensuring reliable performance even in heavy rain or challenging outdoor environments. The universal quick-mount base is compatible with the vast majority of scooters and standard motorcycles currently on the market. It allows for a non-destructive, drill-free installation process that can be completed in just 10 minutes, ensuring a stable and noise-free ride. The dual-mode anti-theft locking system strikes an ideal balance between convenience and security, while the expandable turn signal integration feature further enhances riding safety. This top case is an excellent choice for motorcycle upgrades and modifications, offering versatile utility across all riding scenarios.