--- product_id: 229322391 title: "Bike Trunk Bag 17L-45L Expandable Waterproof Rear Rack Bags" brand: "rockbros" price: "791.91 DT" currency: TND in_stock: true category: "Rockbros" url: https://www.desertcart.tn/products/229322391-bike-trunk-bag-17l-45l-expandable-waterproof-rear-rack-bags store_origin: TN region: Tunisia --- # 45L expandable capacity secure adjustable straps waterproof with rain cover Bike Trunk Bag 17L-45L Expandable Waterproof Rear Rack Bags **Brand:** rockbros **Price:** 791.91 DT **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Ride Ready, Pack Smart – Never Leave Essentials Behind! ## Quick Answers - **What is this?** Bike Trunk Bag 17L-45L Expandable Waterproof Rear Rack Bags by rockbros - **How much does it cost?** 791.91 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/229322391-bike-trunk-bag-17l-45l-expandable-waterproof-rear-rack-bags) ## 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 Last:** Durable polyester and smooth zippers for daily commutes and rugged rides. - • **Stay Safe & Seen:** Reflective strips and taillight compatibility keep you visible after dark. - • **Roomy & Expandable:** From 17L to 45L, pack everything from tools to shoes with ease. - • **Quick & Secure Mounting:** Adjustable straps ensure a rock-solid fit on any bike rack. - • **Versatile Carry Options:** Shoulder and hand straps let you take your gear off-bike in style. ## Overview The ROCKBROS Bike Trunk Bag offers a versatile 17L to 45L expandable capacity with durable, waterproof polyester construction. Designed for professional cyclists and commuters, it features adjustable straps for secure rack mounting, reflective safety elements, and convenient shoulder and hand straps for off-bike carrying. Ideal for daily use and longer trips, it keeps your gear organized, protected, and visible. ## Description desertcart.com: ROCKBROS Bike Trunk Bag 17L-45L Bike Rear Rack Bag with Rain Cover | Expandable Max 45L Large Capacity,Compatible with Taillights & Water Bottle Holder,Night Reflective Design 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 convenient to carry large cameras. 17L-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 & Enduring: 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 rear rack bag 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 a 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.Includes a bright reflective rain cover that fits over the entire bag to help protect belongings in wet conditions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08GKB2NJ8 | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #49,880 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #22 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 (1,670) | | Handle Type | Shoulder Strap | | Item Dimensions L x W x H | 12.99"L x 9.45"W x 8.66"H | | Item Highlight | Expandable Max 45L Large Capacity,Compatible with Taillights & Water Bottle Holder,Night Reflective Design Bike Rack Bag | | Item Weight | 893 g | | 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 | | Number of Items | 1 | | Number of Packs | 1 | | 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 ![Bike Trunk Bag 17L-45L Expandable Waterproof Rear Rack Bags - Image 1](https://m.media-amazon.com/images/I/81MVlbWgcRL.jpg) ## Available Options This product comes in different **Color** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/229322391-bike-trunk-bag-17l-45l-expandable-waterproof-rear-rack-bags](https://www.desertcart.tn/products/229322391-bike-trunk-bag-17l-45l-expandable-waterproof-rear-rack-bags) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-11-04*