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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
Designed for riders who need extra storage on longer journeys, this large capacity bike top tube bag offers reliable waterproof protection and stable mounting. With its spacious interior and structured design, it is ideal for commuting, touring, and bikepacking.
The streamlined shape and secure fit ensure that even with increased capacity, your riding comfort and stability are maintained.
Built with seamless welding technology, this top tube bag provides excellent waterproof protection, keeping your belongings dry in rain and wet conditions.
With an extended 5L capacity, this bag offers significantly more space than standard top tube bags, making it ideal for commuting, long-distance rides, and carrying bulkier essentials.
Made from high-density composite fabric and reinforced with a PP base plate, the bag maintains its shape and protects contents from pressure and daily wear.
The zippered design allows quick and convenient access to your belongings, while the transparent window helps you locate items more easily.
Equipped with a knob tightening system and strong straps, the bag can be firmly secured to the frame for stable riding, even on uneven terrain.
High-visibility reflective elements improve safety during low-light and night rides.
| Brand | ROCKBROS |
|---|---|
| Material | 600D Polyester + TPU |
| Weight | about 100g |
| Capacity | about 1L |
| Size | 22.5 cm × 7 cm × 13 cm |
| Colour | Red, Black, Blue, Orange |


A journey through art and colour, the Road to Sky collection will accompany you as you etch memories into every endless cycling.


Quick release design
Knob fastening system with high-strength cord — secure with a simple twist

1L capacity
1L practical capacity with zip opening — ideal for both commuting and long-distance rides

Pull the knob outward to release the cord.

Extend the cord to fit around the stem or top tube.

Wrap the strap around the stem or top tube and fasten it into the buckle.

Press down the knob and rotate clockwise to tighten.
Details