--- product_id: 229322391 title: "Bike Trunk Bag 17L-45L Expandable Waterproof Rear Rack Bags" brand: "rockbros" price: "143010CFA" currency: XOF in_stock: true reviews_count: 13 category: "Rockbros" url: https://www.desertcart.sn/products/229322391-bike-trunk-bag-17l-45l-expandable-waterproof-rear-rack-bags store_origin: SN region: Senegal --- # 45L expandable capacity secure adjustable straps waterproof with rain cover Bike Trunk Bag 17L-45L Expandable Waterproof Rear Rack Bags **Brand:** rockbros **Price:** 143010CFA **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?** 143010CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/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 Review: Fits our XP4 Lectric Bikes perfectly - After lots of research and asking others opinions, we purchased the RockBros Trunk Bag 17L-45L rear bike bag. We put then on our XP4 Lectric brand bikes and the fit perfectly. We wanted a bag that would expand but not have the constant side saddle bags. I was concerned since other reviews said the water bottle holder was tight. We fit a large 24 oz bottle, 18 oz and a plastic 16 oz bottle in the holder. Pictures provided. I was pleased. The bag is roomy with different options to configure to store items. The large shoulder strap feeling sturdy for portability of the bag. The bag come with a brightly colored rain cover for easy visibility in the rain. Review: Like the Bag, but not the Attachment System - This is a well constructed trunk bag, with ample storage. I like such features as the hidden pannier bags and included shoulder strap, so you can easily take it with you. However, it was nearly impossible for me to secure the bag to my MIK-compatible rack using the bag’s Velcro straps. My e-bike has a fender, leaving little space between the fender and the rack. You have to snake the Velcro strap under the rack, through the buckle on the bottom of the bike bag, and then back underneath again to secure it. My bike probably offered an inch of space between the fender and the rack, making it very difficult to tighten the Velcro enough to secure the bag. I bought an MIK base plate and just attached it today. If you’re buying this bag and think you’ll want to detach the bag from your bike regularly, get the adapter plate. However, those Velcro straps are now in the way. If I fasten them over the base plate, I can’t snap the plate onto my rack. I hate to cut them off, because as soon as I do, I’ll realize they might come in handy for something else. I haven’t spent much time using the bag yet, but I’m not impressed with the Velcro attachment system. But, now that my Rockbros trunk bag is securely attached to my bike, I look forward to putting several miles on it. ## 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 | #53,078 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #33 in Bike Panniers & Rack Trunks | | Brand | ROCKBROS | | Brand Name | ROCKBROS | | Capacity | 45 liters | | Closure Type | Zipper | | Color | Black Grey | | Compatible with Vehicle Type | Bicycle | | Customer Reviews | 4.7 out of 5 stars 1,665 Reviews | | 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 | Polyester | | 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 | | Product Dimensions | 12.99"L x 9.45"W x 8.66"H | | Shell Type | Soft | | Size | 17-45L | | Strap Type | Adjustable | | Style Name | Travel | | UPC | 791966419127 | | Unit Count | 1 Count | | Vehicle Service Type | Bicycle | | Wheel Type | Universal | ## Product Details - **Brand:** ROCKBROS - **Color:** Black Grey - **Material:** 100% 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fits our XP4 Lectric Bikes perfectly *by B***. on July 12, 2026* After lots of research and asking others opinions, we purchased the RockBros Trunk Bag 17L-45L rear bike bag. We put then on our XP4 Lectric brand bikes and the fit perfectly. We wanted a bag that would expand but not have the constant side saddle bags. I was concerned since other reviews said the water bottle holder was tight. We fit a large 24 oz bottle, 18 oz and a plastic 16 oz bottle in the holder. Pictures provided. I was pleased. The bag is roomy with different options to configure to store items. The large shoulder strap feeling sturdy for portability of the bag. The bag come with a brightly colored rain cover for easy visibility in the rain. ### ⭐⭐⭐⭐⭐ Like the Bag, but not the Attachment System *by B***H on January 2, 2025* This is a well constructed trunk bag, with ample storage. I like such features as the hidden pannier bags and included shoulder strap, so you can easily take it with you. However, it was nearly impossible for me to secure the bag to my MIK-compatible rack using the bag’s Velcro straps. My e-bike has a fender, leaving little space between the fender and the rack. You have to snake the Velcro strap under the rack, through the buckle on the bottom of the bike bag, and then back underneath again to secure it. My bike probably offered an inch of space between the fender and the rack, making it very difficult to tighten the Velcro enough to secure the bag. I bought an MIK base plate and just attached it today. If you’re buying this bag and think you’ll want to detach the bag from your bike regularly, get the adapter plate. However, those Velcro straps are now in the way. If I fasten them over the base plate, I can’t snap the plate onto my rack. I hate to cut them off, because as soon as I do, I’ll realize they might come in handy for something else. I haven’t spent much time using the bag yet, but I’m not impressed with the Velcro attachment system. But, now that my Rockbros trunk bag is securely attached to my bike, I look forward to putting several miles on it. ### ⭐⭐⭐⭐⭐ Worth it... I've been pleasantly surprised by all of The RockBros offerings. *by Z***S on June 30, 2026* I wish it was made out of leather but I've got really nothing to complain about. it's well made. the panniers are easy to get open and it stays in place so no worrying about an odd strap etc. ending up in the spokes. The only thing wrong with it is that it encourages you to carry around a lot of junk. The storage capacity is great. the zipper quality is okay. not the best but certainly not the worst. --- ## 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.sn/products/229322391-bike-trunk-bag-17l-45l-expandable-waterproof-rear-rack-bags](https://www.desertcart.sn/products/229322391-bike-trunk-bag-17l-45l-expandable-waterproof-rear-rack-bags) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-10-24*