Motorcycle Top Case 45L Motorcycle Tail Box Bag - Lightweight Aluminum

In this review of the 45L Motorcycle Top Case, the bottom line is simple: this aluminum top trunk is for riders who need a roomy, durable tail box that keeps gear dry and mounts without fuss. The case's single biggest selling point is its combination of a true 45 liter capacity and a lightweight, rustproof aluminum shell, which lets a daily commuter or weekend rider carry a helmet, gloves and personal items while keeping weight low and balance predictable.

Key Features

• 45L capacity: Provides generous storage that fits a full helmet plus gloves and small personal items for daily rides or short trips.
• Strong, lightweight aluminum: The heavy duty aluminum construction keeps the case durable and corrosion resistant without adding excessive weight to the bike.
• Patented design: A distinctive, sport-inspired shape improves looks and adds structural rigidity for long-term use.
• Waterproof and dustproof: Silicone-sealed construction prevents water and dust ingress, keeping electronics and clothing protected in wet conditions.
• Universal bracket and easy installation: A removable base bracket and included screws make mounting straightforward on most tail racks with a simple slide-and-lock routine.
• Anti-theft lock system: Built-in locks secure contents and provide confidence when leaving the bike unattended.

Who It's For

The top case is ideal for commuters and recreational riders who want a reliable, weatherproof storage solution that carries a helmet and daily essentials without dramatically changing handling. It suits riders who value a metal exterior that resists rust and prefers a clean, engineered appearance over soft luggage.

Riders who need ultra-light touring luggage, integrated mounting systems specific to a motorcycle model, or very large expedition capacity should look elsewhere; this trunk is optimized for everyday use, short trips and those prioritizing durability and theft deterrence over expedition-scale volume.

Pros & Cons

Pros

• Durable aluminum shell that resists rust and corrosion for long service life.
• Roomy 45L interior that comfortably stores a helmet and other daily items.
• Waterproof silicone seal keeps contents dry and clean in rain and dusty conditions.
• Universal bracket and clear install steps make mounting quick and accessible.

Cons

• Aluminum construction is heavier and less flexible than textile luggage, which can affect packing shape.
• Universal bracket fits most racks but may require minor adjustment for some bike models.

Specifications

Capacity	45L
Exterior material	Aluminum alloy
Dimensions	16.5in x 13in x 13in
Seal type	Silicone waterproof and dustproof seal
Mounting	Universal base bracket with included screws
Lock	Anti-theft lock system

Our Verdict

The 45L Motorcycle Top Case is a solid choice for riders who want a weatherproof, secure and attractive aluminum trunk for daily commuting and short trips. It balances capacity and weight well, mounts easily with its universal bracket and offers long-term durability that represents good value for riders seeking a metal top box.

Frequently Asked Questions

Will this fit my helmet?
Yes, the 45L interior is designed to accommodate most full-face helmets along with gloves and small accessories.

Is the case really waterproof?
Yes, the silicone-sealed construction is intended to keep water and dust out in normal riding conditions.

How difficult is installation?
Installation is straightforward: unlock and remove the base, screw the bracket to the tail rack, then slide and lock the top case in place.