Upgrade your daily commute or weekend touring adventures with the highly adaptable Basil Sport Design Trunk Bag. Finished in a sophisticated graphite grey, this premium rack pack is specifically engineered for cyclists who want to keep their essential gear organised and accessible without enduring a sweaty back. Constructed from high-grade, water-repellent polyester, it protects your valuables—such as tablets, smartphones, and spare layers—from unexpected road spray and light downpours.
The true highlight of this trunk bag is its clever, variable capacity. While maintaining a compact 7-litre footprint for streamlined daily rides, the top compartment unzips and expands upward, while the sides fold out into secondary pannier pockets to offer up to 15 litres of total storage. Equipped with the Universal Bridge system, it can be mounted using the included Velcro straps or easily integrated with popular modular adapter systems. Transitioning effortlessly from bike to foot, it features an ergonomic carry handle and a comfortable, detachable shoulder strap.
7 to 15-Litre Expanding Volume: Features a variable main compartment and zipped side wings that deploy instantly when you need extra cargo room.
Water-Repellent Polyester: Built from tough, weather-resistant fabric paired with a protective inner lining to keep road grit and drizzle away from electronics.
Universal Bridge Mounting: Designed with a versatile base layout that fastens securely using heavy-duty Velcro or works in conjunction with MIK/Racktime adapter plates.
Multi-Compartment Organisation: Equipped with targeted internal mesh dividers and specialized pockets to keep tools, snacks, and tech items neatly separated.
Commuter Safety Accents: Enhanced with highly reflective piping and trims on all outer panels to increase your visibility to motorists in low-light conditions.
Position on Bicycle: Rear
Installation: Luggage carrier rack
Material: Water-repellent polyester
Volume: 7 litres (expands to 15 litres)
Dimensions: 36cm x 26cm x 18cm
Weight: 1kg
Maximum Carrying Capacity: 5kg
Removable: Yes
Included Accessories: Detachable shoulder strap
Variable Cargo Demands: Perfect if you want a compact, aerodynamic bag for your morning commute that can expand to hold extra groceries or a jacket on the way home.
E-Bike and Commuter Riders: Ideal for cyclists looking for a streamlined, centered rear bag that won't create heavy aerodynamic drag or unbalance the bike.
Multi-Use Portability: Great for riders who park in public areas and need a bag that unclips quickly to function as a comfortable over-the-shoulder bag.
Heavy Downpour Commuting: While the polyester fabric is highly water-repellent against showers, it is not 100% fully waterproof and may let moisture in during prolonged, torrential rain.
No Existing Rear Rack: This bag is strictly designed to sit flat on top of a rear luggage carrier; it cannot be mounted directly to your seatpost or frame tubes.
When deploying the fold-out side pockets to their maximum 15-litre capacity, always place your densest, heaviest items (like a bike lock or tool kit) into the main center compartment rather than the side wings. Keeping the weight centered directly over your rear tyre ensures your bike maintains smooth, predictable handling and prevents the bag from leaning or sagging into your wheel spokes!
