








Some pre-sale items are shipped via international express, which may result in longer delivery times and additional shipping fees. Exact details will be shown at checkout.
We offer a 14-day return and exchange policy from the date you receive your item. Items must be unused, undamaged, with tags attached, in original packaging, and accompanied by proof of purchase.
We cover return shipping for quality issues, defective, damaged, or incorrect items, size-related returns, oversized items such as roof racks, and approved exchanges. For other personal-reason returns, the customer is responsible for return shipping.
For full order cancellations within 14 days, the original standard delivery cost will be refunded. Partial returns generally do not include a refund of the original delivery cost.
Refunds will be processed within 5–7 business days after we receive and inspect your return. Please contact us before returning any item. For questions, email service@rockbrossport.co.uk.
Estimated delivery time

Keep your ride smooth and your gear dry with this playful 13.5L-18L waterproof bike pannier bag! Designed to fit on your rear rack or carry over your shoulder, it offers versatile storage for all your cycling adventures. With plenty of space and water resistance, your essentials stay safe and ready for the next ride, rain or shine. Perfect for commuters and explorers who love to keep things light and hassle-free.
Water Resistant & Durable
Our multifunctional bike pannier bag is crafted using advanced seamless press-fit technology, featuring a fused outer layer and fully pressed adhesive lining. This design offers exceptional water resistance, effectively protecting your gear from rain, spills, and moisture. Keep your cycling essentials dry, no matter the weather.
Helmet Secure Storage
The innovative helmet fixing buckle on the side of the bike bag ensures a secure and convenient way to carry your helmet while cycling. No more hassle of extra storage – simply fasten your helmet and go! It’s a practical, hands-free solution that adds convenience to your ride.
Adjustable Roll-Top for Versatile Capacity
Designed with a unique roll-top structure, this bike trunk bag offers an adaptable capacity, expanding up to 18L. Whether you’re carrying water bottles, repair tools, or extra clothes, it’s easy to adjust the space to suit your needs. Stay organized and ready for any cycling adventure!
Universal Compatibility
Equipped with adjustable buckles, the bicycle bag fits securely on the rear rack of most bicycles. The buckle distance can be easily adjusted from 10 to 20 centimeters, ensuring a tight, stable fit without any wobbling. Installing and removing the bag is quick and hassle-free, making it a perfect choice for all cyclists.
Convenient Backpack Conversion
Need to transition from cycling to walking? Simply unzip the built-in shoulder straps and convert the bicycle rear seat bag into a stylish, functional backpack. Effortlessly switch between cycling and walking scenarios without missing a beat, offering the best of both worlds.
| Brand | ROCKBROS |
| Material | Body: Polyester + TPU / Clasp: Nylon + PA |
| Capacity | 13.5 - 18 L |
| Net Weight | Approximately 1004 g |
Keep your ride smooth and your gear dry with this playful 13.5L-18L waterproof bike pannier bag! Designed to fit on your rear rack or carry over your shoulder, it offers versatile storage for all your cycling adventures. With plenty of space and water resistance, your essentials stay safe and ready for the next ride, rain or shine. Perfect for commuters and explorers who love to keep things light and hassle-free.
Water Resistant & Durable
Our multifunctional bike pannier bag is crafted using advanced seamless press-fit technology, featuring a fused outer layer and fully pressed adhesive lining. This design offers exceptional water resistance, effectively protecting your gear from rain, spills, and moisture. Keep your cycling essentials dry, no matter the weather.
Helmet Secure Storage
The innovative helmet fixing buckle on the side of the bike bag ensures a secure and convenient way to carry your helmet while cycling. No more hassle of extra storage – simply fasten your helmet and go! It’s a practical, hands-free solution that adds convenience to your ride.
Adjustable Roll-Top for Versatile Capacity
Designed with a unique roll-top structure, this bike trunk bag offers an adaptable capacity, expanding up to 18L. Whether you’re carrying water bottles, repair tools, or extra clothes, it’s easy to adjust the space to suit your needs. Stay organized and ready for any cycling adventure!
Universal Compatibility
Equipped with adjustable buckles, the bicycle bag fits securely on the rear rack of most bicycles. The buckle distance can be easily adjusted from 10 to 20 centimeters, ensuring a tight, stable fit without any wobbling. Installing and removing the bag is quick and hassle-free, making it a perfect choice for all cyclists.
Convenient Backpack Conversion
Need to transition from cycling to walking? Simply unzip the built-in shoulder straps and convert the bicycle rear seat bag into a stylish, functional backpack. Effortlessly switch between cycling and walking scenarios without missing a beat, offering the best of both worlds.
| Brand | ROCKBROS |
| Material | Body: Polyester + TPU / Clasp: Nylon + PA |
| Capacity | 13.5 - 18 L |
| Net Weight | Approximately 1004 g |
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