---
product_id: 61678587
title: "Bike Trunk Bag"
brand: "rockbros"
price: "€ 183.89"
currency: EUR
in_stock: null
reviews_count: 8
url: https://www.desertcart.de/products/61678587-bike-trunk-bag
store_origin: DE
region: Germany
---

# Expandable 34L capacity Water-resistant carbon leather Shock-absorbing padded interior Bike Trunk Bag

**Brand:** rockbros
**Price:** € 183.89
**Availability:** ❌ Out of Stock

## Summary

> 🚴‍♂️ Elevate your commute with the ultimate waterproof, expandable bike bag!

## Quick Answers

- **What is this?** Bike Trunk Bag by rockbros
- **How much does it cost?** € 183.89 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/61678587-bike-trunk-bag)

## 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

- • **Rock-Solid Frame:** Integrated body frame resists deformation, securing your valuables with confidence on every ride.
- • **Ride Rain or Shine:** Premium carbon composite leather keeps your gear dry and durable no matter the weather.
- • **Cushioned Protection:** Thick padded interior and detachable partitions safeguard your essentials from bumps and shocks.
- • **Pack More, Stress Less:** Expandable 34L capacity with easy zipper fold-out transforms your bag into a spacious pannier on demand.
- • **Versatile Carry, Anywhere:** Dual shoulder straps convert the bike bag into a sleek messenger bag for seamless off-bike style.

## Overview

The ROCKBROS Bike Rack Bag is a 34L waterproof, foldable rear seat cargo pack crafted from durable carbon composite leather. Featuring an expandable design, padded shock protection, and a rigid frame, it offers versatile carrying options with adjustable straps and multiple compartments—perfect for the modern cyclist seeking style, capacity, and reliability.

## Description

ROCKBROS Bike Rack Bag Trunk Waterproof Carbon Leather Bicycle Rear Seat Cargo Pack Pannier Handbag

## Features

- WATER RESISTANT: RockBros bike trunk bag made of carbon composite leather which is strong water resistant and durable.
- FOLDABLE CAPACITY: 34L Large capacity bicycle bags rear rack can be unfolded with zippers to a bike pannier when you need more capacity.
- MULTIFUNCTION: Delicate bike bags comes with 2 shoulder straps can use as messenger bag. Portable design convenience your travel life.
- THICKEN PAD REDUCING SHOCK: Padded inside reducing shock while cycling. Detachable partition for usage flexibility.
- INTERATED BODY FRAME: Hard to deflective during using.Protect clothes, shoes, phone, clothes, shoes, phone, cameras, kettle and other belongs into the bike trunk bag confidently.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Color | Black |
| Size | 34L |
| Brand | ROCKBROS |
| Material | Composite Carbon Leather |
| Vehicle Service Type | bike　rear　rack |
| Pattern | Solid |
| Mounting Type | Velcro |
| Strap Type | Adjustable |
| Capacity | 34 Liters |
| Closure Type | Zipper |
| Handle Type | Web Handle |
| Number of Compartments | 5 |
| Shell Type | Soft |
| Manufacturer | ROCKBROS |
| UPC | 658126868853 |
| Model | A6-6 |
| Item Weight | 3.44 pounds |
| Product Dimensions | 14.96 x 10.63 x 7.87 inches |
| Item model number | A6-6 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | A6-6 |
| Special Features | Expandable, Waterproof |

## Product Details

- **Color:** Black
- **Size:** 34L
- **Brand:** ROCKBROS
- **Material:** Composite Carbon Leather
- **Vehicle Service Type:** bike　rear　rack

## Images

![Bike Trunk Bag - Image 1](https://m.media-amazon.com/images/I/71pVoaazEvL.jpg)

## Available Options

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

## Questions & Answers

**Q: how easy are the rear side bags to take in and out?**
A: They are extremely easy to take out and put back in.. 
I own two of these bags.

**Q: Will this work on foldable ebike (EG 250)- will unfolded panniers be too long? Rack long enough?**
A: I'm not familiar with the EG 250 foldable ebike, but I'll give you the dimensions of the truck bag.The main truck bag compartment measures 12"×6"×6" inside. The expandable panniers measures 15"×10"×2" when open. The panniers hang down 11" from the of the top base plate of the carrier rack. 
The bag is well made, spacious, and extremely water resistant when all compartments are closed up. I have three of these bags. The other two of these bags have different brand names and use nylon canvas outer shells with ordinary sippers construction and materials. Those other bags are not as water resistant as this RockBros version. 

I'm pleased with not only the RockBros poly outer, but I'm equally pleased with the materials and construction of the moisture repellent sippers RockBros truck bag.
 
I highly recommend this trunk bag, it is worth extra expense over all of the others for the ability to shed rain water.
I hope this helps.

**Q: Is the bottom hard?  i want to attach a mik adapter plate to use with my mik rack.**
A: It’s stiff… but I don’t know that I would call it “hard” it flexes and it’s not rigid. It would probably work ok with a Rack mount system, although I am not familiar with Mik’s set up.

**Q: Reviewers indicate some received a rain cover. does this come bag come w rain cover?**
A: Yes it did come with a rain cover

## Customer Reviews

### ⭐⭐⭐⭐⭐ Cool bag
*by D***N on May 18, 2025*

So far it is a pretty cool bag. Can be used on just about any bike or motorcycle that has a flat rack over back wheel. If it proves to be durable over time it is a good product.

### ⭐⭐⭐⭐⭐ Great product!
*by F***D on May 23, 2025*

Quality product! Amazing company with excellent customer service and product support.

### ⭐⭐⭐⭐⭐ Holds all my crap
*by D***N on May 27, 2025*

love it !

## Frequently Bought Together

- ROCKBROS Bike Rack Bag Trunk Waterproof Carbon Leather Bicycle Rear Seat Cargo Pack Pannier Handbag
- Lamicall Bike Phone Holder, Motorcycle Phone Mount - Motorcycle Handlebar Cell Phone Clamp, Scooter Phone Clip for iPhone 15 Pro Max/Plus, 14 Pro Max, S9, S10 and More 4.7" to 6.8" Smartphones
- ROCKBROS Bike/Bicycle Phone Front Frame Bag, Waterproof, Tube Bag,Cycling Pouch, Bike Accessories for Men Compatible Phone Under 6.5”

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**Shop now:** [https://www.desertcart.de/products/61678587-bike-trunk-bag](https://www.desertcart.de/products/61678587-bike-trunk-bag)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-04*