Premium Waterproof Expandable Motorcycle Luggage Bag

Engineered for unpredictable road conditions, this expandable motorcycle luggage bag delivers reliable rain protection and instant packing flexibility through a dedicated PVC fabric shell.

The weather-resistant outer layer coats the entire main compartment, keeping internal gear completely dry during sudden precipitation or wet highway runs. Instead of hauling multiple containers for different trip lengths, riders simply extend the side panels to unlock extra storage depth without altering the mounting footprint or center of gravity.

Measured Dimensions by Model

• M (MT4026) weighs 2000g and expands from 32×30×22 cm to 40×30×22 cm
• L (MTR4045) weighs 2530g and expands from 40×30×27 cm to 55×31×27 cm
• XL (MT4060) weighs 2840g and expands from 44×31.5×31.5 cm to 62×31.5×31.5 cm
• XXL (MTR4080) weighs 3480g and expands from 50×33×36 cm to 68×33×36 cm

Each frame measures to exact millimeter tolerances, enabling precise rack clearance checks before installation. The base configuration stays compact enough for tight city weaving, while the fully deployed state accommodates large helmets, tool rolls, or overnight camping kits. Because the coated PVC construction resists cracking and water absorption across temperature extremes, the bag maintains its structural alignment whether loaded near capacity or stored empty during off-season periods.

Check your vehicle’s rear suspension stroke, exhaust routing, and fender geometry against these specified dimensions to guarantee adequate ground clearance and airflow. Choose the weight class and dimension profile that aligns with your standard packing routine, then secure riding essentials without worrying about shifting loads or weather damage.