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Expandable Bike Trunk Bag | Waterproof Rear Rack Carrier Bag & Cycling Pannier Shoulder Pack

Expandable Bike Trunk Bag | Waterproof Rear Rack Carrier Bag & Cycling Pannier Shoulder Pack

Engineered directly in our manufacturing facility, this 27L Expandable Bicycle Rear Rack Bag is crafted for long-distance touring, outdoor cycling, and daily urban commuting. Constructed from heavy-duty 600D waterproof Oxford fabric, it features foldable multi-compartment side panniers, top loading space, integrated reflective strips for night safety, and an included rain cover. Designed for cycling gear brands and e-commerce sellers, we provide complete OEM/ODM custom production—including custom logo application, material upgrades, Pantone color matching, and private-label packaging.

  • 27L Expandable Capacity: Main compartment plus side zipper drop-down panniers for flexible storage on long-distance trips.

  • Heavy-Duty 600D Oxford Fabric: Scratch-resistant, tear-resistant, and splash-proof fabric with an included waterproof rain cover for extreme weather.

  • Versatile Carrying Modes: Functions as a bike rear rack trunk bag, handbag, or shoulder crossbody bag via the included quick-release shoulder strap.

  • Comprehensive OEM/ODM Support: Full custom options for rubber patches, screen printing, reflective logos, custom colorways, and retail-ready packaging.

Item No.
SWMB-002
Material
600D High-Density Waterproof Oxford Fabric
Size
27L Large Capacity (Expandable Side Compartments)
Color
Black, Blue, Red (Custom Colors & Camo Patterns Available)
MOQ
50
Sample Time
5 - 7 Days
Bulk Lead Time
20 - 40 Days
OEM/ODM
Logo Printing/Patches, Fabric Material, Color Schemes, Zipper Pulls & Retail Packaging

Factory-Direct OEM/ODM Expandable Bicycle Trunk Bag & Rear Rack Pannier

Expand your bike luggage product line with our 27L high-capacity rear rack carrier bag, manufactured directly in our production facility. Constructed with wear-resistant 600D Oxford fabric and engineered for touring cyclists, mountain bikers, and daily commuters, this expandable trunk bag offers high utility, water resistance, and multi-functional versatility for private-label distributors and e-commerce brands.

Key Features & Specifications

  • Expandable 27L Storage Capacity: Main top compartment expands, while hidden side zip pockets unfold into full panniers to hold helmets, clothing, repair kits, and camping gear.
  • Durable & Weatherproof Construction: Built with high-density 600D Oxford fabric to resist abrasions, paired with a fitted high-visibility rain cover to keep interior contents completely dry.
  • 3-in-1 Versatile Design: Easily converts from a rear seat rack bag to a portable handbag or a shoulder sling pack with the included detachable padded shoulder strap.
  • Safe & Secure Mounting: Heavy-duty velcro straps mount firmly onto standard rear bike racks without swaying, complimented by high-reflectivity safety strips for night visibility.

Complete OEM/ODM & Private Label Manufacturing

As a professional bag factory, we provide end-to-end custom production to help you build your brand’s unique outdoor line:

  • Custom Branding Options: Molded rubber/PVC patches, high-density embroidery, silk-screen printing, or reflective brand logos.
  • Custom Materials & Colors: Classic Black, Royal Blue, Vibrant Red, or custom Pantone color dyes and tactical camouflage fabrics.
  • Retail-Ready Packaging: Custom polybags, branded hangtags, instruction cards, barcode labels, and FBA master carton packaging.

Why Work With Our Factory?

  • Fast Prototype Sampling: Custom OEM samples produced in 3–5 business days to accelerate your product launch.
  • Low MOQ for Trial Orders: Flexible trial production starting at 50 pcs to support new market entries.
  • Rigorous Quality Control: Inline fabric testing, seam-reinforcement checks, and zipper endurance testing for zero-defect shipments.

Technical Specifications

Model Number SWMB-002
Capacity Up to 27 Liters (Expandable Side Panniers)
Material 600D High-Density Waterproof Oxford Fabric
Included Accessories Waterproof Rain Cover, Detachable Shoulder Strap
Service Model OEM / ODM / Private Label Manufacturing
Sample Lead Time 3 – 5 Business Days
Customization Options Logo, Color, Fabric, Dimensions, Packaging
 

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OEM & ODM Backpack Manufacturing Solutions

We help brands, importers, wholesalers, and Amazon sellers build custom backpack products from concept to production.

Customization options include:

• Custom logo (embroidery, printing, embossing, rubber patch…)
• Material selection (Oxford, Polyester, Nylon, RPET, PU leather…)
• Color customization based on Pantone matching system
• Structural customization (compartments, size, pockets, functions…)
• Packaging customization for retail or e-commerce branding

Whether you are launching a new brand or expanding your product line, we provide full OEM/ODM support from sampling to mass production.

Strict Quality Control Process

Every order is carefully inspected to ensure product consistency and durability.

• Raw material inspection before production
• In-line production quality monitoring
• Final inspection before packaging
• Functional and durability testing based on product type

We ensure every backpack meets export-quality standards before shipment.

Production & Order Information

• MOQ: 50–500 pcs (varies by model and customization)
• Sample lead time: 3–7 days
• Bulk production time: 20–40 days
• Flexible OEM & ODM support for different business scales

We support both small trial orders and large-scale production.

Request Pricing & Samples

Contact us for pricing, MOQ, samples, and customization options. Our backpack manufacturing specialists will provide a tailored solution based on your project requirements.

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