7 Best Trunk Bags for Motorcycle (Researched and Compared)

We researched and compared the top trunk bags for motorcycles using manufacturer specifications, industry safety standards, and aggregated owner feedback. Our evaluation focuses on real-world performance, durability, and ease of use to help you choose the right bag for your rides.

1. GIVI EA101B Monokey Trunk: Best Overall

🛒  Check Price on Amazon →

The GIVI EA101B is a top-tier trunk bag that excels in durability and security. Its Monokey system allows quick on/off while maintaining a rock-solid connection to the bike. Based on owner feedback, the 42-liter capacity is generous enough for touring essentials, and the integrated lock adds peace of mind. However, the need for a separate mounting plate increases initial investment and may not fit all motorcycle models.

This bag is ideal for riders who prioritize security and are willing to invest in a dedicated mounting system. Skip it if you prefer universal solutions or have a bike incompatible with Monokey plates.

• Spacious 42 liters fits two helmets
• Tool-free mounting with secure Monokey system
• Integrated lock for theft deterrence

Pros: Excellent build quality and weather sealing; Very secure attachment, minimal wobble
Cons: Requires specific GIVI mounting plate (sold separately)

2. SHAD SH29 Trunk Bag: Runner Up

🛒  Check Price on Amazon →

The SHAD SH29 offers a balance of capacity and portability. Its expandable design is convenient for varying loads, and the included rain cover ensures weather protection. Based on owner reports, the mounting straps work well on most motorcycles but may need periodic tightening. The reflective details improve night visibility, though some users noted the bag can shift slightly on rough roads.

This is a strong choice for riders who want a universal bag that can double as a carry-on. Skip it if you need a fully rigid, lockable trunk.

• Expandable from 29L to 36L
• Includes rain cover and shoulder strap
• Reflective elements for visibility

Pros: Versatile mounting with included straps; Good value for expandable storage
Cons: Straps may require adjustment for a snug fit

3. Nelson-Rigg CL-8550 Deluxe Trunk Bag: Best Value

🛒  Check Price on Amazon →

The Nelson-Rigg CL-8550 stands out for its waterproof build and low cost. The RF-welded seams keep contents dry even in heavy rain, a feature praised by owners. Its magnetic mount is convenient for steel tanks but limits compatibility with non-ferrous surfaces. The 21-liter capacity is modest, suitable for day trips rather than extended tours.

This bag is perfect for budget-conscious riders with steel tanks who need reliable waterproofing. Skip it if you require a larger trunk or have a non-magnetic tank.

• Waterproof construction with RF-welded seams
• Magnetic base for easy tank attachment
• Three external pockets for organization

Pros: Fully waterproof without needing a rain cover; Affordable price point
Cons: Magnetic mount may not suit aluminum or plastic tanks

4. Kappa KZ423 Trunk Bag: Compact Choice

🛒  Check Price on Amazon →

The Kappa KZ423 is a no-frills trunk bag designed for daily use. Its padded interior offers decent protection for electronics or fragile items, and the universal straps are simple to attach. Owner feedback indicates it holds up well over time, but the lack of a rain cover is a drawback in wet climates. At 23 liters, it is best for essentials.

This is a solid pick for commuters with small bikes who want a lightweight, affordable bag. Skip it if you need weather protection or larger storage.

• Compact size fits smaller motorcycles
• Padded interior protects cargo
• Universal strap system fits most tail racks

Pros: Lightweight and easy to install; Good for short commutes
Cons: Limited capacity for long trips; No rain cover included

5. Viking Bags Trunk Bag: Classic Style

🛒  Check Price on Amazon →

The Viking Bags Trunk Bag appeals to riders seeking a classic look. Its faux leather and studded design complement cruiser and bobber styles. However, based on owner reviews, the 18-liter capacity is tight for even a jacket and gloves. The magnetic closure is convenient but not fully secure on bumpy roads. Weather resistance is minimal without the optional cover.

This bag is best for short, dry rides where style matters more than utility. Skip it if you need practical, all-weather storage.

• Retro faux leather with chrome studs
• Magnetic closure with strap
• Detachable shoulder strap

Pros: Unique vintage aesthetic; Good quality faux leather
Cons: Small capacity limits use; Not waterproof; rain cover sold separately

6. Dowco Fastrax 2.0 Trunk Bag: Modular Option

🛒  Check Price on Amazon →

The Dowco Fastrax 2.0 offers modularity with its included dry bag, allowing separation of wet and dry items. The 28-liter capacity is decent for day trips, and reflective piping aids visibility. However, owner feedback points to strap durability issues after extended use, and the mounting system can be time-consuming to adjust. The dry bag is a nice addition but adds bulk.

This bag suits riders who want a flexible setup for variable weather. Skip it if you prefer a simpler, more durable design.

• Expandable main compartment
• Includes waterproof dry bag
• Reflective piping

Pros: Versatile with included dry bag; Good for wet conditions
Cons: Mounting straps can be fiddly; Build quality concerns over time

7. Oxford Aqua T20 Trunk Bag: Budget Pick

🛒  Check Price on Amazon →

The Oxford Aqua T20 is a simple, budget-friendly trunk bag that focuses on waterproofing. Its roll-top closure keeps contents dry, but the lack of internal organization or padding means fragile items need careful packing. Based on owner reports, the straps are adequate but can loosen over time. At 20 liters, it is best for light loads.

This bag is ideal for riders on a tight budget who prioritize waterproofing over features. Skip it if you need structured protection or multiple compartments.

• Roll-top waterproof closure
• Lightweight at 1.2 lbs
• Universal strap mounting

Pros: Very affordable; Fully waterproof design
Cons: Limited organization pockets; No padding for electronics

Frequently Asked Questions

How do I choose the right trunk bag size for my motorcycle?

Consider your typical cargo needs: 20-30 liters is fine for daily commutes, while 35+ liters suits touring. Also check your motorcycle’s rear rack dimensions and weight capacity to ensure compatibility.

Are trunk bags easy to install on any motorcycle?

Most universal trunk bags come with adjustable straps that fit various racks. However, some bags require specific mounting plates (e.g., GIVI Monokey) which may not be compatible with all bikes. Always verify before purchase.

Can I use a trunk bag as a backpack or carry-on?

Many trunk bags include detachable shoulder straps, making them portable off the bike. However, they are often bulkier than standard backpacks. Check the bag’s specs for carry-on dimensions if you plan to fly.

How important is waterproofing for a trunk bag?

If you ride in rain or live in a wet climate, waterproofing is crucial. Look for bags with welded seams or included rain covers. Even water-resistant bags can leak under heavy rain, so consider a dry bag liner for sensitive items.

Do trunk bags affect motorcycle handling or safety?

A properly mounted trunk bag should not significantly affect handling, but avoid overloading as it can shift weight. Ensure the bag does not obstruct taillights or turn signals. Reflective elements improve visibility at night.

Our Verdict

After evaluating specs, safety features, and owner feedback, the GIVI EA101B Monokey Trunk is our top pick for its superior build, security, and ease of use. For a more affordable yet capable option, the SHAD SH29 Trunk Bag is an excellent runner-up with versatile expandability.