---
product_id: 229322391
title: "ROCKBROS Bike Trunk Bag 17L-45L Rear Rack Bags for Bicycles Waterproof | Include Rain Cover,Ideal MTB & Road Bike,Compatible with Taillight & Water Bottle"
brand: "rockbros"
price: "$204.12"
currency: USD
in_stock: true
category: "Rockbros"
url: https://www.desertcart.us/products/229322391-rockbros-bike-trunk-bag-17l-45l-rear-rack-bags-bicycles
store_origin: US
region: United States of America
---

# 45L expandable capacity Waterproof & weatherproof Secure rack mounting straps ROCKBROS Bike Trunk Bag 17L-45L Rear Rack Bags for Bicycles Waterproof | Include Rain Cover,Ideal MTB & Road Bike,Compatible with Taillight & Water Bottle

**Brand:** rockbros
**Price:** $204.12
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Ride Ready, Rain or Shine – Carry More, Worry Less!

## Quick Answers

- **What is this?** ROCKBROS Bike Trunk Bag 17L-45L Rear Rack Bags for Bicycles Waterproof | Include Rain Cover,Ideal MTB & Road Bike,Compatible with Taillight & Water Bottle by rockbros
- **How much does it cost?** $204.12 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/229322391-rockbros-bike-trunk-bag-17l-45l-rear-rack-bags-bicycles)

## Best For

- rockbros enthusiasts

## Why This Product

- Trusted rockbros brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Durable polyester with smooth zippers and reinforced stitching for daily commutes and rugged adventures.
- • **Versatile Carry Options:** Hidden panniers plus shoulder and hand straps let you switch from bike to street style effortlessly.
- • **Safety Meets Convenience:** Integrated taillight mount, reflective strips, and a bright rain cover keep you visible and dry on every ride.
- • **Rock-Solid Rack Attachment:** Crisscross adjustable straps keep your bag locked in place on any bike type, no wobble guaranteed.
- • **Massive 45L Expandable Storage:** Roomy interior with adjustable dividers fits everything from bike tools to cameras and clothes.

## Overview

The ROCKBROS Bike Trunk Bag offers a versatile 17L to 45L expandable capacity with waterproof polyester construction, secure rack mounting, and multiple carrying options. Designed for commuters and adventure cyclists alike, it features adjustable dividers, hidden panniers, reflective safety elements, and a rain cover, making it the ultimate rear rack companion for all weather and terrain.

## Description

desertcart.com : ROCKBROS Bike Trunk Bag 17L-45L Bike Rear Rack Bag Bike Bags for Bicycles Rear Rack Waterproof Bike Rack Bag : Sports & Outdoors

## Features

- Max 45L Large Capacity: ROCKRBOS trunk bag has roomy cushioned interior can hold a lot of stuff, such as bike tools, shoes and extra clothing. Adjustable dividers making it conceivable to carry large cameras. 16L-45L capacity, many options for expansion.
- Versatile & Portable: Expandable double side bike panniers are hided by zippers and available when needed. You can unzip the expansion and fit clothes and shoes in the trunk bag. There are also shoulder and hand straps for carrying the rockbros bike bag with you.
- Sturdy Construction & Durbale: Well made and compact, strong material, good stitching and zippers function smoothly. Hold plenty for daily commuting and a day trip, handy for shopping at the store.
- Easy To Install & Stay In Place: Go straight across or crisscross the solid straps make the bike trunk to fix your bike rack firmly. Suitable trunk bag for mountain bikes, road bikes, leisure bikes, ebikes, etc.
- Compatible with Taillights & Water Bottle Holder: A spot in the rear bike rack bag to attach an tail light and high visibility stripes on the side, increase safety at night. Outside water bottle pocket with a cord to tighten which is helpful over rough roads. Come with a bright and reflective rain cover to throw over the whole bike bag.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08GKB2NJ8 |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #42,548 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #29 in Bike Panniers & Rack Trunks |
| Brand Name | ROCKBROS |
| Capacity | 45 Liters |
| Closure Type | Zipper |
| Color | Black Grey |
| Compatible with Vehicle Type | Bicycle |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,630) |
| Handle Type | Shoulder Strap |
| Item Dimensions L x W x H | 12.99"L x 9.45"W x 8.66"H |
| Item Weight | 893 Grams |
| Manufacturer | ROCK BROS |
| Manufacturer Part Number | A6-03BK-6/US |
| Material Type | Polyester |
| Model Number | A6-03BK-6/US |
| Mounting Type | Rack Mount |
| Number of Compartments | 2 |
| Pattern | Solid |
| Pocket Description | Cargo Pocket |
| Shell Type | Soft |
| Size | 17-45L |
| Strap Type | Adjustable |
| Style Name | Travel |
| UPC | 791966419127 |
| Unit Count | 1 Count |
| Wheel Type | Universal |

## Product Details

- **Brand:** ROCKBROS
- **Color:** Black Grey
- **Material:** Polyester
- **Size:** 17-45L
- **Vehicle Service Type:** Bicycle

## Images

![ROCKBROS Bike Trunk Bag 17L-45L Rear Rack Bags for Bicycles Waterproof | Include Rain Cover,Ideal MTB & Road Bike,Compatible with Taillight & Water Bottle - Image 1](https://m.media-amazon.com/images/I/81MVlbWgcRL.jpg)

## Available Options

This product comes in different **Color** options.

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**Shop now:** [https://www.desertcart.us/products/229322391-rockbros-bike-trunk-bag-17l-45l-rear-rack-bags-bicycles](https://www.desertcart.us/products/229322391-rockbros-bike-trunk-bag-17l-45l-rear-rack-bags-bicycles)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-22*