Top 9 Expandable Bike Bag – Bike Panniers & Rack Trunks

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1. Lixada

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Lixada Bike Rear Bag Bicycle Pannier Bag Saddle Bag 25L Bicycle Rear Seat Bag Bike Carrier Trunk Bag Expandable Waterproof MTB Bike Rack Bag with Rain Cover

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Lixada #ad - If not needed, close the zipper. Side pocket extensionthe lixada bicycle bag supports extended functions on both sides to meet more capacity needs. At the top of the bicycle trunk is a mesh bag with a shrink strap that secures the bicycle accessory, such as a mini pump.

The rider can safely put clothes, mobile phones, shoes, cameras, kettles into the bicycle bag. Easy installationthe kettle compartment rope buckle is designed for easy removal and fixing of the kettle. The kettle compartment is equipped with wide-brimmed lights and reflective strips, unique silver rain cover helps for safe night riding. Multiple functionsthis bicycle rear seat bag features two side quality buckles and a strong shoulder strap. Excellent waterproofmade of high-quality waterproof fabric, the bag is soft and comfortable, and its fabric is clean and flat and has good wear resistance.

Double protectionthe four sides of the bicycle trunk are thickened to provide cushioning and reduce vibration when driving on uneven roads. The bag is also equipped with a rain cover to keep the items dry at all times. Fastener strap for easy and quick installation on all types of bicycles with a rear seat, such as mountain bike, road bike, etc.
BrandLixada #ad
ManufacturerLixada #ad
Part NumberWQU7042815276663XP

2. Lumintrail

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Expandable Rear Trunk Bicycle Carrier Commuter Pannier Handbag with a Waterproof Rain Cover, Lumintrail Bike Rack Bag

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Lumintrail #ad - The secondary bottle holder on top with adjustable bungee cord provides an additional way to store your water bottle. Portable design: a great travel companion this bag has an adjustable padded shoulder strap that is easily removable to go from biking to walking. Padded sides with adjustable bungee cord: this cycling pack has padded sides keeping your items secure while on the road and will keep its shape no matter how full the bag is.

Easy to attach: mount to any rear bike rack with 2 long velcro straps that go across the rack with 2 additional straps that will prevent the bag from shifting while riding. Multiple storage options: the main compartment has plenty of storage space, for your everyday items and can be expanded to carry tools, lunch, and more. In addition, totaling 13l, there is a water bottle pocket and fold-out pockets on each side for even more storage for items such as laptops up to 13” and tablets.

Use this bike pannier bag on any bike with racks such as commuter, cruiser, fat tire, and e-bikes. Safe & secure: reflective strips provide peace of mind when riding at night and a strap on the back allows for the attachment of a rear light for even more safety. There is a double carry strap making it easy to grab and go. Included is a bright removable rain cover that keeps your bag protected during the rain and provides extra visibility while riding.
BrandLumintrail #ad
ManufacturerLumintrail #ad
Height7 Inches
Length12 Inches
Width9 Inches
Part NumberBB-6030

3. LOCALLION

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LOCALLION 15L Bike Trunk Bag Expandable Bicycle Rack Bag Bike Rear Seat Cargo Bag Bicycle Rack Trunk Panniers Bicycle Rear Rack Storage Luggage

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LOCALLION #ad - Nylon anti-slip strap, the whole bike bag is waterproof, durable and non-slip. Easy installationthere are many Velcro straps at the bottom of the bag, which make the installation more convenient and the adhesion more firm.

Better serviceif you have any questions about our products or services, please feel free to contact us and we will handle them properly for you. The tail lamp can be hung at the back of the bag to ensure your riding safety at night. Press glue zipper to make a good touch feeling and more durable. Large capacitythe bicycle bag has large capacity to meet your daily travel needs, and the pockets on both sides of the bag can be expanded to provide more storage space.

Unique designthere is a special adjustable water bottle bag at the back of the bicycle bag. High quality materialmade of high density waterproof fabric, not easy to seep, no need to worry about sudden rain. At the same time, it is equipped with an adjustable shoulder strap, which can be buckled on both sides of the bike bag to used as a satchel.
BrandLOCALLION #ad
ManufacturerLOCALLION #ad
Height7.87 Inches
Length14.17 Inches
Weight1.48 Pounds
Width12.2 Inches
Part NumberBFZ00051

4. Roswheel

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Roswheel ATTACK Series 121371 Waterproof Expandable Capacity Bike Frame Triangle Bag for Bicycle Cycling Accessories

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Roswheel #ad - Well-structred design: 3l spacious main compartment with movable divider and 1L expandable extra storage. Better safety: Reflective logos enhance visibility.

Multpurpose: exit port in main compartment routes a hydration tube or battery wire accessories not included. One zippered outside pocket and two mesh pouches. Sturdy construction and waterproof: 210d diamond lattice nylon shell, waterproof double wall TPU lining, and waterproof zippers offer a total protection for your belongings. Easy & firm installation: all around Hypalon-reinforced Velcro straps adjust to accommodate most bikes and guarantee easy installation and release.
BrandRoswheel #ad
ManufacturerRoswheel Bike Co., Ltd. #ad
Height6 Inches
Length15 Inches
Weight0.7 Pounds
Width3 Inches
Part Number121371
Model121371
WarrantyOur goal is making every customer 100% satisfaction. We offer a limited one-year product warranty on every item we sold. Please contact us directly for the extended warranty information.

5. Serfas

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Serfas Ark Expandable Half-Frame Bicycle Bag Black

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Serfas #ad - 5 adjustable hook & Loop Frame Mounting Straps. Hydration port for water Bladder Compatibility Bladder & Hose Not Included. Water Resistant Materials. Multiple bag Exterior Attachment Points. Expandable storage 3L to 5L Expanded.
BrandSerfas #ad
ManufacturerSerfas #ad
Weight0.22 Pounds
Part NumberLT-FR1BK

6. Delta Cycle & Home

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Delta Top Trunk Bicycle Bag

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Delta Cycle & Home #ad - Easily attachable trunk bag. Weight: 417 grams. Inches. Heavy duty 600 D woven polyester. Secure velcro fastening to the bike rack. Not expanded: 12" x 5" x 7" | volume 6. 8 liters 420 cu. Measures 13 by 5 by 7 inches; 7. 5-liter volume. Expandable main compartment, internal zipper pocket. Bike bag attaches securely to bike rack; includes removable shoulder strap. Expanded: 12" x 5" x 8. 5" | volume 7. 5 liters 458 cu inches. Internal zip pocket, size 13 x 5 x 7", volume 7. 5 liters 458 cubic inches.
BrandDelta Cycle & Home #ad
ManufacturerAztec / Delta #ad
Height8.5 Inches
Length12 Inches
Weight0.25 Pounds
Width5 Inches
Part NumberMS2000
ModelTop Trunk Bike Bag
WarrantyOne Year Warranty

7. Ibera

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Clip On Quick Release Design and Detachable Shoulder Strap, Ibera 2 in 1 PakRak Commuter Bicycle Trunk Bag with Expandable Panniers

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Ibera #ad - Smart quick release/clip-on system - just simply attach and detach bags within few seconds - no straps required! Easy and time saving! Built-in foldaway panniers – This bike bag can be trunk bag and pannier at the same time. Hard base, reinforced, padded main body - A durable carbon-patterned ABS base allows the bag to be set down on wet surfaces, protecting the cargo within. Ideal for weekend bike touring. Night riding safety - 360 Degree Reflective trim/ Taillight hanger design. Carry school books, a change of clothes, bike gear, groceries, and all your small stuff.
BrandIbera #ad
ManufacturerBV USA Enterprises #ad
Height11.4 Inches
Length15 Inches
Width8.9 Inches
Part NumberIB-BA14
ModelIB-BA14

8. Lixada

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Lixada Bike Rear Bag Bicycle Pannier Bag Saddle Bag 25L Bicycle Rear Seat Bag Bike Carrier Trunk Bag Expandable Waterproof MTB Bike Rack Bag with Rain Cover

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Lixada #ad - Male and female riders can also use the bicycle bag as a handbag or shoulder bag. At the top of the bicycle trunk is a mesh bag with a shrink strap that secures the bicycle accessory, such as a mini pump. Excellent waterproofmade of high-quality waterproof fabric, shoes, cameras, the bag is soft and comfortable, and its fabric is clean and flat and has good wear resistance.

Fastener strap for easy and quick installation on all types of bicycles with a rear seat, road bike, such as mountain bike, etc. Easy installationthe kettle compartment rope buckle is designed for easy removal and fixing of the kettle. Double protectionthe four sides of the bicycle trunk are thickened to provide cushioning and reduce vibration when driving on uneven roads. The rider can safely put clothes, mobile phones, kettles into the bicycle bag.

The kettle compartment is equipped with wide-brimmed lights and reflective strips, unique silver rain cover helps for safe night riding. If not needed, close the zipper. Multiple functionsthis bicycle rear seat bag features two side quality buckles and a strong shoulder strap. The bag is also equipped with a rain cover to keep the items dry at all times. Side pocket extensionthe lixada bicycle bag supports extended functions on both sides to meet more capacity needs.
BrandLixada #ad
ManufacturerLixada #ad
Part NumberIQX8711077415235XV

9. ZTZ

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ZTZ Bike Rack Bag, Bike Rear Seat Cargo Bag Expandable Rear Trunk Bicycle Carrier Commuter Pannier Handbag with a Waterproof Rain Cover

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ZTZ #ad - There is a double carry strap making it easy to grab and go. Portable design: a great travel companion this bag has an adjustable padded shoulder strap that is easily removable to go from biking to walking. Padded sides with adjustable bungee cord: this cycling pack has padded sides keeping your items secure while on the road and will keep its shape no matter how full the bag is.

This bag fit most of road or mountain bikes' racks. Safety design:this bicycle rear seat bag is designed with two side reflective logos, all-around reflective pipeline and back reflective strip with taillight loop not included taillight, which provide bikers a safer night riding. In addition, totaling 13L, there is a water bottle pocket and fold-out pockets on each side.

Easy tool free installation:2 adjustable velcro straps and 2 fixed buckles ensure stability, also make it easy to be installed and unloaded in seconds. Multiple storage options: the main compartment has plenty of storage space, lunch, for your everyday items and can be expanded to carry tools, and more. The secondary bottle holder on top with adjustable bungee cord provides an additional way to store your water bottle.
BrandZTZ #ad
ManufacturerZTZ #ad
Height1.97 Inches
Length11.81 Inches
Width15.75 Inches
Part NumberZFWEF4568SD41E