Here’s an overview of the Best Bike Trunk that we’ll explore today:
Bike trunk bags are essential for riders who want to extend their capability beyond a hydration pack or saddlebag—whether commuting, touring, or bikepacking. A reliable trunk bag increases payload flexibility, keeps tools and spares organized, and, with reflective elements and rain protection, enhances safety in everyday riding. In this review, I test five popular rear-rack bags across a pricing spectrum from budget to premium, focusing on waterproofing, load organization, attachment security, and everyday usability. Methodology: I evaluate each bag for fit on common rack dimensions, security of mounting straps, ease of access, weather protection, interior organization, and the practicality of converting the bag into a shoulder or crossbody carry when off the bike. I also consider real-world use cases (commuting, shopping, bike touring, and weekend trips) to gauge versatility and value.
1. JXFUKAL Bike Bags for Bicycle Rear rack – 9.5L/17L/40L Hard Shell Waterproof Bike Ebike Trunk Pannier Saddle Seat Bag Carrier with Reflector
- Brand: JXFUKAL
- Manufacturer: JXFUKAL
Experience JXFUKAL Bike Bags for Bicycle Rear rack – 9.5L/17L/40L Hard Shell Waterproof Bike Ebike Trunk Pannier Saddle Seat Bag Carrier with Reflector. 🚴WATERPROOF HARD SHELL DESIGN: The bike rack bag is made of EVA, coated with PU. It features water resistant, sturdy, lightweight, and easy to clean. Solid shapes make it not deform and look stylish. The bike bag also comes with a rain cover, so no worry about cycling on a rainy day. 🚴9.5L CAPACITY: Our bike trunk bag includes a 9.5L main compartment, 3 inner mesh pockets, an extra top pocket, and an adjustable elastic cord. This help keep your riding essentials well organized. Dimension of 15.35 x 6.89 x 7.87 inches(L x W x H), large enough to store bike tool kit, pump, wallets, phones, power banks, small speakers, towels, clothes, food, drinks, bike locks, sunglasses, etc.
Pros
- 🚴WATERPROOF HARD SHELL DESIGN: The bike rack bag is made of EVA, coated with PU. It features water resistant, sturdy, lightweight, and easy to clean. Solid shapes make it not deform and look stylish. The bike bag also comes with a rain cover, so no worry about cycling on a rainy day.
- 🚴9.5L CAPACITY: Our bike trunk bag includes a 9.5L main compartment, 3 inner mesh pockets, an extra top pocket, and an adjustable elastic cord. This help keep your riding essentials well organized. Dimension of 15.35 x 6.89 x 7.87 inches(L x W x H), large enough to store bike tool kit, pump, wallets, phones, power banks, small speakers, towels, clothes, food, drinks, bike locks, sunglasses, etc.
- 🚴REFLECTIVE: The reflective design on four sides increases nighttime visibility, and the taillights (not included) are hung on the rear strap making your cycling safer.
Cons
- May not be suitable for all product users.
- Some users might prefer different features.
2. KEMIMOTO Rear Bike Rack Bag – 8L PVC Water Resistant Ebike Bags for Bicycle Rear Rack
- Brand: KEMIMOTO
- Manufacturer: KEMIMOTO
Experience KEMIMOTO Rear Bike Rack Bag – 8L PVC Water Resistant Ebike Bags for Bicycle Rear Rack. 3-in-1 Bike Rack Bag: The bike rear rack bag comes with hand straps and a simple shoulder strap, allowing it to transform into a crossbody bag, handbag, or ebike bag for various situations. Its portable design makes carrying easy when you’re not riding. Beyond cycling, this versatile pannier bag is perfect for travel, camping, picnics, and other outdoor activities, making it an essential companion for all your adventures Safe Night Riding: Enhance your night riding safety with our bike bag, featuring white patterned PVC reflective strips on the back and sides for improved visibility. It also includes a convenient strap for easy taillight installation (taillight not included), ensuring an extra layer of protection
Pros
- Beyond cycling, this versatile pannier bag is perfect for travel, camping, picnics, and other outdoor activities, making it an essential companion for all your adventures Safe Night Riding: Enhance your night riding safety with our bike bag, featuring white patterned PVC reflective strips on the back and sides for improved visibility.
Cons
- May not be suitable for all product users.
- Some users might prefer different features.
3. West Biking Bike Rear Seat Bag
- Brand: West Biking
- Manufacturer: West Biking
Experience West Biking Bike Rear Seat Bag. 8.6L Large Capacity – Dimension of 15 x 6.7 x 6.7inch (L x W x H), large enough to store bike tools, bike tire pump, cable lock, clothes, wallet, phones, power bank, towels, water bottles, maps, food, etc. This under seat storage bag includes a 8.6L main compartment, with 3 inner mesh pocket, help to get your essentials well organized. The top elastic drawstring can also help you tie a lot of items,like bike pump, umbrella, clothes,etc High Quality & Waterproof Material – The bike rack bag is made of 600D Oxford fabric coated with PU, design with EVA material, which is water resistant, durable and lightweight, easy to clean. Water resistant material & fully waterproof double zipper to help you keep your belongings dry,it also come with a rain cover, so do not worry about cycling in rainy day. (The waterproof zipper may require a little effort to pull, and requires a little attention during use)
Pros
- The top elastic drawstring can also help you tie a lot of items,like bike pump, umbrella, clothes,etc High Quality & Waterproof Material – The bike rack bag is made of 600D Oxford fabric coated with PU, design with EVA material, which is water resistant, durable and lightweight, easy to clean.
Cons
- May not be suitable for all product users.
- Some users might prefer different features.
4. JXFUKAL Bike Bags for Bicycle Rear rack – 9.5L/17L/40L Hard Shell Waterproof Bike Ebike Trunk Pannier Saddle Seat Bag Carrier with Reflector
- Brand: JXFUKAL
- Manufacturer: JXFUKAL
Experience JXFUKAL Bike Bags for Bicycle Rear rack – 9.5L/17L/40L Hard Shell Waterproof Bike Ebike Trunk Pannier Saddle Seat Bag Carrier with Reflector. 🚴17L CAPACITY: Our bike rack bag includes a 9.5L main compartment, 2 added side bags, 5 inner mesh pockets, an extra top pocket, and an adjustable elastic cord. Dimension of 15.35 x 10.25 x 7.87 inches(L x W x H), it’s up to 17L, large enough to store and keep riding essentials organized, such as bike tool kit, pump, wallets, phones, power banks, small speakers, towels, clothes, food, drinks, bike locks, sunglasses, etc. 🚴WATERPROOF HARD SHELL DESIGN: The bike trunk bag is made of EVA, coated with PU. It features water resistant, sturdy, lightweight, and easy to clean. Solid shapes make it not deform and look stylish. The bike bag also comes with a rain cover, so no worry about cycling on a rainy day.
Pros
- 🚴17L CAPACITY: Our bike rack bag includes a 9.5L main compartment, 2 added side bags, 5 inner mesh pockets, an extra top pocket, and an adjustable elastic cord. Dimension of 15.35 x 10.25 x 7.87 inches(L x W x H), it’s up to 17L, large enough to store and keep riding essentials organized, such as bike tool kit, pump, wallets, phones, power banks, small speakers, towels, clothes, food, drinks, bike locks, sunglasses, etc.
- 🚴WATERPROOF HARD SHELL DESIGN: The bike trunk bag is made of EVA, coated with PU. It features water resistant, sturdy, lightweight, and easy to clean. Solid shapes make it not deform and look stylish. The bike bag also comes with a rain cover, so no worry about cycling on a rainy day.
- 🚴REFLECTIVE: The reflective design on four sides increases nighttime visibility, and the taillights (not included) are hung on the rear strap making your cycling safer.
Cons
- May not be suitable for all product users.
- Some users might prefer different features.
5. JXFUKAL Rear Bike Rack Bag with Rain Cover
- Brand: JXFUKAL
- Manufacturer: JXFUKAL
Experience JXFUKAL Rear Bike Rack Bag with Rain Cover.
Pros
Cons
- May not be suitable for all product users.
- Some users might prefer different features.
Frequently Asked Questions
We’ve compiled answers to the most common questions about bike trunks to help you make an informed decision.
Conclusion
Final thoughts: For riders who prioritize max protection and capacity, the JXFUKAL hard-shell line (0) stands out with its expandable capacity and comprehensive weather protection.
The KEMIMOTO (1) and West Biking (2) models offer a compelling mix of price, safety, and practical organization, especially for commuters.
If you want the most budget-friendly path without sacrificing basic water resistance and rain protection, the 16.99 JXFUKAL option (4) is a strong starter choice. In short: choose premium for rugged durability and expansion (Product 0), mid-range for balanced features (Products 1–2), or budget for essential daily use (Product 4)..