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 17L-45L is a game-changer for cyclists looking to maximize their storage capacity without sacrificing durability or waterproofing. This rear rack bag boasts an impressive 17 to 45 liters of storage space, making it perfect for long-distance rides or daily commuting. Say goodbye to cumbersome backpacks or bulky panniers and hello to a sleek, streamlined solution for carrying all your essentials on the go.

Whether you’re storing snacks for a weekend adventure or packing a change of clothes for your daily commute, the ROCKBROS Bike Trunk Bag has got you covered. Its waterproof construction ensures your belongings stay dry in any weather conditions, while the easy-to-install design ensures quick and secure attachment to your bike’s rear rack. With multiple compartments and pockets, organizing your gear has never been easier, allowing you to focus on the road ahead without worrying about your belongings. Say goodbye to cluttered handlebars and heavy backpacks, and say hello to the convenience and reliability of the ROCKBROS Bike Trunk Bag.

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

$79.99  in stock
as of April 20, 2024 3:15 pm


The ROCKBROS Bike Trunk Bag 17L-45L Bike Rear Rack Bag is designed to provide cyclists with a convenient and secure way to carry their essentials while on the go. With a capacity ranging from 17 to 45 liters, this bag offers plenty of space for storing items such as clothing, tools, and snacks. It features multiple compartments and pockets for easy organization, as well as reflective elements for added visibility during night rides. The bag attaches securely to the rear rack of a bicycle, ensuring stability and safety while riding.


Cyclists can use the ROCKBROS Bike Trunk Bag for various purposes, such as commuting to work, running errands, or embarking on long-distance bike tours. The bag can easily accommodate clothing changes, lunch boxes, water bottles, and other essentials needed for a day out on the road. Its waterproof construction ensures that items remain dry even in wet weather conditions, making it a reliable choice for all kinds of cycling adventures.


The ROCKBROS Bike Trunk Bag boasts a sleek and durable design that is built to withstand the rigors of regular use. Made from high-quality materials, such as waterproof polyester and sturdy zippers, this bag is designed to last for many years. It features a simple yet functional design with adjustable straps and buckles for easy installation and removal. The bag is also lightweight and compact, making it easy to carry off the bike when needed.

Build Quality

When it comes to build quality, the ROCKBROS Bike Trunk Bag excels in terms of durability and reliability. The materials used in its construction are of top-notch quality, ensuring that the bag can withstand daily wear and tear. The seams are well-stitched, and the zippers glide smoothly, enhancing the overall user experience. Additionally, the bag is designed to resist water and dust, keeping belongings safe and secure in any weather conditions.

Primary Features

Some of the standout features of the ROCKBROS Bike Trunk Bag include its adjustable capacity, reflective elements, and easy installation. The bag can be expanded or collapsed depending on the amount of gear being carried, providing versatility for different types of rides. The reflective elements enhance visibility and safety, especially when cycling at night. Installation is a breeze, thanks to the adjustable straps and buckles that secure the bag to the rear rack with ease. Overall, the primary features of this bag make it a practical and reliable choice for cyclists of all levels.

Pros Cons
– Large storage capacity (17L-45L) – May be too bulky for some riders
– Waterproof material to protect belongings – Limited organization pockets or compartments
– Easy to install on bike rear rack – May not fit all types of bike racks
– Reflective strips for added visibility – May not be as durable as some higher-end bike bags

Factors to Consider

When choosing a bike trunk bag for your bicycle, there are several factors to consider to ensure you make the right purchase decision. Here are some key points to keep in mind:

Capacity and Size

One of the most important considerations when selecting a bike trunk bag is the capacity and size. The ROCKBROS Bike Trunk Bag comes in 17L-45L options, so you can choose the size that best fits your needs. Consider how much gear you typically carry on your rides and choose a bag with adequate space to accommodate all your essentials.

Waterproof Design

Another crucial feature to look for in a bike trunk bag is its waterproof design. The ROCKBROS Bike Trunk Bag is made with a waterproof material to keep your belongings dry and protected from the elements. This is especially important if you plan on riding in rainy conditions or storing electronic devices in your bag.


Make sure the bike trunk bag you choose is compatible with your bicycle’s rear rack. The ROCKBROS Bike Trunk Bag is designed to easily attach to most rear racks, providing a secure and stable fit. Double-check the measurements of your bike rack before making a purchase to ensure a proper fit.


Look for a bike trunk bag that is durable and built to last. The ROCKBROS Bike Trunk Bag is constructed with high-quality materials that are resistant to wear and tear, making it a reliable option for long-term use. Consider the quality of the zippers, seams, and overall construction of the bag to ensure it can withstand frequent use.

Reflective Accents

Safety is paramount when riding a bike, especially in low-light conditions. Choose a bike trunk bag that features reflective accents to enhance visibility on the road. The ROCKBROS Bike Trunk Bag includes reflective details that help increase your visibility to other motorists, enhancing your safety during night rides.

Additional Features

Consider any additional features that may enhance the functionality of the bike trunk bag. The ROCKBROS Bike Trunk Bag comes with multiple compartments for organized storage, as well as a detachable shoulder strap for easy carrying off the bike. Think about what features are important to you and choose a bag that meets your specific needs.


When it comes to selecting a bike trunk bag for your bicycle, the ROCKBROS Bike Trunk Bag offers a combination of capacity, durability, and functionality to meet your riding needs. By considering factors such as size, waterproof design, compatibility, durability, reflective accents, and additional features, you can make an informed decision that enhances your cycling experience. Choose the ROCKBROS Bike Trunk Bag for a reliable and versatile option that will streamline your rides and keep your gear secure on the road.

Related Amazon Products

Finding the Right ROCKBROS Bike Trunk Bag on Amazon

To find the right ROCKBROS Bike Trunk Bag on Amazon, follow these steps:

1. Visit the Amazon Website

Go to the Amazon website and search for “ROCKBROS Bike Trunk Bag” in the search bar.

2. Filter the Search Results

Use the filter options on the left side of the screen to narrow down your search by selecting specific features such as capacity (17L-45L), material, color, and price range.

3. Read Customer Reviews

Read through customer reviews and ratings to get an idea of the bag’s quality, durability, and performance from real users.

Choosing the Right ROCKBROS Bike Trunk Bag

1. Determine Your Needs

Consider what you will be using the bag for – commuting, long-distance touring, or recreational rides – and choose a size and style that fits your specific needs.

2. Check the Features

Look for features such as waterproof material, reflective strips for visibility, multiple compartments for organization, and easy installation on the bike’s rear rack.

3. Compare Prices

Compare prices of different ROCKBROS Bike Trunk Bags on Amazon to ensure you are getting the best value for your money.

Common Issues with ROCKBROS Bike Trunk Bags

One common issue with ROCKBROS Bike Trunk Bags is that they may not fit all bike models, so make sure to double-check compatibility with your bike’s rear rack before purchasing. Additionally, some users have reported that the zippers on the bags can be a bit flimsy, so handle them with care to avoid damage.


Is the ROCKBROS Bike Trunk Bag waterproof?

Yes, the ROCKBROS Bike Trunk Bag is made of waterproof material, keeping your belongings safe and dry during wet weather conditions.

How much storage capacity does the bag have?

The bag has a storage capacity of 17L-45L, providing you with ample space to store your essentials during your bike rides.

Does the bag come with a rear rack for installation?

No, the ROCKBROS Bike Trunk Bag does not come with a rear rack. It is designed to be attached to your existing bike rear rack for easy installation.

Can I easily attach and detach the bag from my bike?

Yes, the ROCKBROS Bike Trunk Bag features quick-release straps for easy attachment and detachment from your bike’s rear rack.

Is the bag suitable for long-distance rides?

Yes, the ROCKBROS Bike Trunk Bag is suitable for long-distance rides, providing you with a convenient way to carry your items while cycling for extended periods of time.

In conclusion, the ROCKBROS Bike Trunk Bag is a top choice for cyclists looking for a reliable and versatile storage solution for their outdoor adventures. With its spacious 17L-45L capacity, waterproof design, and easy installation on bike rear racks, this bag provides ample space for all your essentials while keeping them safe and dry. Whether you’re commuting to work, going on a long road trip, or hitting the trails, the ROCKBROS Bike Trunk Bag offers convenience and peace of mind. Upgrade your biking experience today with this durable and practical bike bag.

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