---
product_id: 47142777
title: "Bike Seat Bag, Bicycle Saddle Bag Under Seat 3D Shell Cycling Seat Pack for Mountain Road Bikes Black"
brand: "rockbros"
price: "A$72"
currency: AUD
in_stock: true
reviews_count: 8
category: "Rockbros"
url: https://www.desertcart.com.au/products/47142777-bike-seat-bag-bicycle-saddle-bag-under-seat-3d-shell
store_origin: AU
region: Australia
---

# Reflective strap for night visibility Waterproof fabric with taped zipper 3D shock-resistant shell Bike Seat Bag, Bicycle Saddle Bag Under Seat 3D Shell Cycling Seat Pack for Mountain Road Bikes Black

**Brand:** rockbros
**Price:** A$72
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Gear Up, Stand Out — The Ultimate Saddle Companion

## Quick Answers

- **What is this?** Bike Seat Bag, Bicycle Saddle Bag Under Seat 3D Shell Cycling Seat Pack for Mountain Road Bikes Black by rockbros
- **How much does it cost?** A$72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/47142777-bike-seat-bag-bicycle-saddle-bag-under-seat-3d-shell)

## 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

- • **Mount & Go:** Quick-install straps and rubber buckle ensure a secure, hassle-free fit under your saddle.
- • **Night Rider’s Ally:** Reflective strap and taillight hook boost your visibility and safety after dark.
- • **Weatherproof Warrior:** Durable waterproof fabric and taped zipper shield your gear from unexpected downpours.
- • **Organized On-the-Move:** Structured interior with mesh pockets fits keys, snacks, and repair tools neatly.
- • **Ride Protected, Always:** 3D shell with wave cushion absorbs shocks to keep your essentials safe on every trail.

## Overview

The ROCKBROS Bike Seat Bag is a sleek, 1.5L capacity saddle pack designed for mountain and road cyclists seeking durable, weather-resistant storage. Featuring a 3D shock-absorbing shell, waterproof fabric with taped zippers, and reflective safety straps, it offers secure mounting and organized space for essentials like keys and snacks. Lightweight at 135g and backed by a 1-year warranty, it’s a top-rated accessory (#1 in Bike Seat Packs) trusted by over 5,000 riders.

## Description

Buy ROCKBROS Bike Seat Bag, Bicycle Saddle Bag Under Seat 3D Shell Cycling Seat Pack for Mountain Road Bikes Black: Seat Packs - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good storage option - Great item. I use it on my morning bike rides. Easily fits my cellphone and keys. Built sturdy. Mounting on the bike is easy.
Review: Great product - I'm liking this very much. Look and works great

## Features

- SPECIAL SHAPE and UPGRADE STRAPS:3D shell saddle bag with wave cushion provides inside shock resistant protection if fell out.Upgrade straps make up for the deflective old ones and support lifetime warranty
- RAINPROOF:Waterproof fabric with taped zipper for rain.Do not soak this seat bag in the water for a long time( stitches are not waterproof )
- EASY TO INSTALL:2 stickup straps and a rubber buckle simplify mount system.Moreover , it keeps bag securely attach to seat post
- NIGHT VISIBILITY:Reflective strap around the seat bag to increase night visibility while night cycling.Taillight hook compact space on the seat post ( Taillight doesn't include in the package )
- QUALITY GUARANRTEE and friendly customer service. Any questions during using contract RockBros Bicycle with pictures.ARTISTIC:Delicate details- mesh pockets , structured inside can hold cashes ,keys , snack bars and other small repair tools (W 3.22 * L 9 * H 3.93 inches)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075CZ1JVR |
| Best Sellers Rank | #5,381 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1 in Bike Seat Packs |
| Brand | ROCKBROS |
| Brand Name | ROCKBROS |
| Capacity | 1.5 Liters |
| Closure Type | Zipper |
| Color | Black |
| Compatible with Vehicle Type | Bicycle |
| Customer Reviews | 4.6 out of 5 stars 5,127 Reviews |
| Global Trade Identification Number | 00783057062732 |
| Handle Type | Web Handle |
| Item Dimensions L x W x H | 9"L x 3.22"W x 3.93"H |
| Item Weight | 135 Grams |
| Manufacturer | ROCKBROS |
| Manufacturer Warranty Description | 1 Year |
| Material | Polyester |
| Material Type | Polyester |
| Mounting Type | Seat Mount |
| Number of Compartments | 1 |
| Pattern | Solid |
| Product Dimensions | 9"L x 3.22"W x 3.93"H |
| Shell Type | Soft |
| Size | 9 Inch L x 3.22 Inch W x 3.93 Inch H |
| Strap Type | Removable |
| Style Name | Bike Saddle Bag |
| UPC | 783057062732 |
| Unit Count | 1 Count |
| Vehicle Service Type | Bicycle |

## Product Details

- **Brand:** ROCKBROS
- **Color:** Black
- **Material:** Polyester
- **Size:** 9 Inch L x 3.22 Inch W x 3.93 Inch H
- **Vehicle Service Type:** Bicycle

## Images

![Bike Seat Bag, Bicycle Saddle Bag Under Seat 3D Shell Cycling Seat Pack for Mountain Road Bikes Black - Image 1](https://m.media-amazon.com/images/I/61e5CdQvLIL.jpg)

## Available Options

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

## Questions & Answers

**Q: There's no listed volume like some other bags, but my road kit is 2 co2 cannisters w/valve , tire levers and an extra tube. Will it hold all of that?**
A: Yes it will.  I have 2 CO2 cannisters, 2 tubes, levers, mini toolkit and room to spare for something like a garage door opener.

**Q: Will this bag hold a Samsung S9 phone?**
A: I have a Samsung Note 9, with a water proof case which measures 7" x 3 1/2" and it would note fit in the bike bag.

**Q: Bike tools, pump, tube, and a heavy chain lock will this all fit?**
A: It will be tight. I fit a 29er tube a c02 and the tool and a chain tool couple zip ties and some allen wrenches. Been working good for this race season in Arizona.

**Q: Si tengo que estacionar lo puedo llevar como un pequeño maletin**
A: Si puedes hacerlo, ponerlo solo consta en 2 velcros laterales y un seguro plástico que va alrededor del poste del asiento

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good storage option
*by R***B on December 10, 2025*

Great item. I use it on my morning bike rides. Easily fits my cellphone and keys. Built sturdy. Mounting on the bike is easy.

### ⭐⭐⭐⭐⭐ Great product
*by M***L on January 31, 2026*

I'm liking this very much. Look and works great

### ⭐⭐⭐⭐ Almost perfect, slightly bigger and lighter would be better.
*by M***O on January 14, 2026*

This is extremely sturdy with excellent shape and very good zippers. It seems a bit smaller than the claimed 1.5 liter size, and the velcro, while super secure when perfectly aligned, is unnecessarily stiff and makes fitment a bit fussy when the seat is set fully forward. 10-15% more interior space, less dense materials, and some mounting refinements would earn my fifth star.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.com.au/products/47142777-bike-seat-bag-bicycle-saddle-bag-under-seat-3d-shell](https://www.desertcart.com.au/products/47142777-bike-seat-bag-bicycle-saddle-bag-under-seat-3d-shell)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-08*