ROCKBROS Bike Trunk Bag 17L-45L Bike Rear Rack Bag Bike Bags for Bicycles Rear Rack Waterproof Bike Rack Bag Review

The ROCKBROS Bike Trunk Bag is a game-changer for cyclists who need a reliable and spacious solution for carrying their essentials on the go. With a capacity ranging from 17L to 45L, this waterproof bike rack bag offers ample space for storing everything from clothing to tools to snacks. Its durable construction and secure mounting system make it the perfect companion for long rides or daily commutes.

One of the key features of the ROCKBROS Bike Trunk Bag is its versatility, as it can easily be attached to most bike rear racks. This eliminates the hassle of carrying a backpack or having to settle for smaller, less efficient storage options. Additionally, the waterproof design ensures that your belongings stay dry and protected in all weather conditions. Say goodbye to bulky, uncomfortable bags that hinder your cycling experience, and make the switch to the ROCKBROS Bike Trunk Bag for a more convenient and enjoyable ride.


The ROCKBROS Bike Trunk Bag is designed to provide cyclists with a convenient and secure way to carry their belongings while on the go. With a capacity ranging from 17L to 45L, this bag offers ample storage space for essentials such as clothing, snacks, tools, and more. The bag features multiple compartments and pockets, allowing users to organize their items efficiently. Additionally, the bag is equipped with reflective strips for enhanced visibility in low light conditions, enhancing safety.


The ROCKBROS Bike Trunk Bag is perfect for long-distance rides, commuting, or bike touring adventures. It can easily be attached to the rear rack of most bicycles, providing a stable and secure storage solution. Cyclists can use this bag to transport groceries, camping gear, or any other necessities while on the road. The waterproof design ensures that belongings stay dry even in rainy conditions, making it ideal for all types of weather conditions.


Constructed from durable and water-resistant materials, the ROCKBROS Bike Trunk Bag is built to withstand the rigors of daily use. The bag features a sleek and aerodynamic design that minimizes wind resistance while riding. The adjustable straps and buckles make it easy to securely attach the bag to the bike’s rear rack, preventing it from shifting or bouncing during rides. The bag also has a convenient carry handle for easy transport off the bike.

Build Quality:

ROCKBROS is known for producing high-quality cycling accessories, and the Bike Trunk Bag is no exception. The bag is made with durable and tear-resistant materials that can withstand the demands of frequent use. The stitching is reinforced for added strength, ensuring that the bag holds up well over time. The zippers are robust and reliable, providing easy access to the contents of the bag without the risk of snagging or breaking.

Primary Features:

Some of the standout features of the ROCKBROS Bike Trunk Bag include its expandable capacity, adjustable straps, reflective elements, and waterproof construction. The expandable design allows cyclists to customize the bag’s storage capacity based on their needs, while the adjustable straps ensure a secure and snug fit on the bike. The reflective elements enhance visibility and safety, particularly during nighttime rides. Overall, the ROCKBROS Bike Trunk Bag is a versatile and reliable accessory for cyclists of all levels.

Pros Cons
– Waterproof design
– Spacious storage capacity
– Easy installation and removal
– Reflective strips for added visibility
– May not fit all bike models
– Limited color options
– May require additional support for heavy loads

Key Features

The ROCKBROS Bike Trunk Bag is a versatile and durable option for cyclists looking to transport their belongings safely and securely. With a capacity ranging from 17L to 45L, this rear rack bag offers ample storage space for all your essentials. The waterproof design ensures your items stay dry even in rainy conditions, making it perfect for long rides or daily commutes.


Before making a purchase, it is important to ensure that the ROCKBROS Bike Trunk Bag is compatible with your bicycle’s rear rack. Check the dimensions and mounting system to make sure it will fit securely on your bike. Some bags may be adjustable to fit different rack sizes, so be sure to double-check before buying.


When evaluating similar products, consider the materials and construction of the bike trunk bag. Look for durable and water-resistant materials that can withstand regular use and varying weather conditions. Reinforced stitching and sturdy zippers are also important factors to consider to ensure your belongings stay safe and secure while riding.

Storage Capacity

The storage capacity of the ROCKBROS Bike Trunk Bag is another important factor to consider. Think about what items you need to transport on your rides and choose a size that fits your needs. If you often carry bulky items or need extra space for long rides, opt for a larger capacity bag. On the other hand, if you only need to carry a few essentials, a smaller bag may be sufficient.

Organizational Features

Look for bike trunk bags with multiple compartments and pockets to help you stay organized while on the go. Internal pockets can help separate and secure smaller items, while external pockets are convenient for easy access to frequently used items. Consider your storage needs and how you prefer to organize your belongings when evaluating different bags.

Visibility and Safety

Ensure that the ROCKBROS Bike Trunk Bag has reflective elements or additional safety features to make you more visible to other motorists while riding. Reflective strips or bright colors can help increase your visibility, especially in low light conditions. Safety should always be a top priority when choosing a bike trunk bag for your rides.

Easy Installation

Consider the ease of installation when evaluating bike trunk bags. Look for bags with simple and secure mounting systems that can be easily attached and removed from your bike. Some bags may require additional tools or hardware for installation, so be sure to check the requirements before making a purchase. A quick and hassle-free installation process can save you time and frustration in the long run.

Related Amazon Products

  • Search for the Product

    To find the ROCKBROS Bike Trunk Bag on Amazon, go to the Amazon website and use the search bar to enter the keywords “ROCKBROS Bike Trunk Bag.” You can also browse through the Sports & Outdoors category and look for bike bags or trunk bags.

  • Read Product Descriptions and Reviews

    Once you find the ROCKBROS Bike Trunk Bag, make sure to read the product descriptions carefully. Look for important details such as the bag’s capacity, dimensions, materials, and features. Also, check out customer reviews to see what other buyers have to say about the product.

  • Check Specifications and Compatibility

    Before making a purchase, check the specifications of the ROCKBROS Bike Trunk Bag to ensure that it fits your bike’s rear rack. Make sure to measure your bike’s rear rack and compare it with the bag’s dimensions to ensure a proper fit. Also, check if the bag’s capacity meets your storage needs.

  • Compare Prices and Offers

    Compare prices of the ROCKBROS Bike Trunk Bag from different sellers on Amazon. Look for any discounts, deals, or offers that may be available. Consider factors such as shipping costs, delivery time, and seller ratings when making a decision.

  • Make a Purchase

    Once you have found the right ROCKBROS Bike Trunk Bag for your needs, add it to your cart and proceed to checkout. Make sure to select a shipping option that works best for you and provide accurate shipping and payment information. Complete your purchase and wait for your new bike trunk bag to arrive!

## FAQ

### Is the ROCKBROS Bike Trunk Bag waterproof?

Yes, the ROCKBROS Bike Trunk Bag is made with waterproof materials to keep your belongings dry even in wet weather conditions.

### How much storage capacity does the bag have?

The bag is available in sizes ranging from 17L to 45L, providing ample storage space for your cycling essentials and personal belongings.

### Is the bag easy to install on a bike rear rack?

Yes, the ROCKBROS Bike Trunk Bag is designed to easily attach to most standard bike rear racks, making it a convenient option for cyclists.

### Can the bag withstand rough terrain and bumpy rides?

Yes, the bag is constructed with durable materials and secure fastenings to ensure that it stays in place even during rough rides on uneven terrain.

### Does the bag come with reflective elements for added visibility?

Yes, the ROCKBROS Bike Trunk Bag features reflective strips and accents to increase visibility and safety when cycling in low light conditions.

In conclusion, the ROCKBROS Bike Trunk Bag is a highly valuable choice for cyclists looking for a reliable and versatile bag to enhance their biking experience. With its spacious storage capacity of 17-45L, waterproof design, and easy installation on the rear rack of bicycles, this bag offers convenience and functionality for all types of riders. Additionally, the durable materials and thoughtful design details make it a long-lasting investment. Whether you are commuting to work, embarking on a long-distance ride, or simply running errands around town, the ROCKBROS Bike Trunk Bag is a must-have accessory for any biking enthusiast.

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