A Modern Classic, Reimagined
The Ortlieb Trunk-Bag RC takes everything we love about Ortlieb’s proven waterproof pannier construction and applies it to a 12-litre rack-top format. It’s a sturdy, roll-closure trunk bag that’s equally suited to commuters, touring cyclists, and anyone who wants quick-access storage with full waterproof protection.
Designed to mount to nearly any rear rack using Ortlieb’s award-winning Rack-Lock Adapter system, the Trunk-Bag RC hits a sweet spot between capacity, versatility, and weatherproofing. Whether you’re picking up groceries, commuting with a laptop, or packing for a multi-day ride, this bag claims to keep your gear protected and your ride streamlined.
So how does it hold up in real-world conditions? We loaded it up, hit the road, and here’s what we found.
Key Specifications
| Feature | Detail |
|---|---|
| Volume | 12 litres |
| Dimensions | 30 x 38 x 20 cm (H x W x D) |
| Weight | 800g |
| Waterproof | Yes (IP64 roll-top) |
| Closure | Hook and loop roll-closure |
| Mounting | Ortlieb Rack-Lock Adapter |
| Rack Fit | Widths from 80–160 mm |
| Extras | Shoulder strap, carry handle, interior pocket, carabiner |
| Made In | Germany |
| Price | £110 (Ortlieb UK official) |
Design and Build Quality
At first glance, the Trunk-Bag RC looks like a mash-up between a dry bag and a toolbox—and that’s a good thing. It’s built with Ortlieb’s signature PU-laminated polyester fabric, heat-welded for seamless waterproofing and exceptional durability. The feel is immediately rugged and purposeful, and the muted black aesthetic fits discreetly on touring or commuter bikes.
Roll-Top Closure
The standout feature is the new roll-closure system, which replaces zippers or flaps with a hook-and-loop roll seal. This provides:
- Fast, easy access
- Full waterproof protection (IP64 rating)
- Added top carry handle (the rolled fabric becomes the grip)
This closure is much faster and more secure than older zip-lid rack bags and won’t wear out over time or fail when wet, muddy, or frozen.
Storage and Internal Features
With 12 litres of internal volume, the Trunk-Bag RC is spacious enough for:
- A large waterproof jacket
- D-lock + cable
- Packed lunch or groceries
- Tools and spares
- A change of clothes
It works beautifully as a replacement for a small backpack or messenger bag. The bright interior lining improves visibility inside the bag—ideal when searching for a multitool at dusk.
Internal Pocket + Carabiner
Inside the main compartment is a small zipped pocket and a built-in carabiner loop—great for keys, wallet, or a mini pump. These prevent your essentials from being buried under bulkier items.
External Non-Waterproof Pocket
There’s also a small exterior pouch stitched onto the back panel. This isn’t waterproof, so it’s best reserved for receipts, wrappers, or other low-value items you may want to access quickly at a stoplight or campsite.
Mounting System: Rack-Lock Adapter
One of the best things about this bag is its universal compatibility with standard rear racks. The Ortlieb Rack-Lock Adapter fits racks between 80–160 mm wide (tube diameter up to 16 mm) and allows:
- Tool-free mounting and removal
- Full adjustability
- Secure snap-lock retention
Once set up, it takes less than five seconds to attach or detach the bag with a satisfying click. The baseplate remains flush to the bag’s underside and doesn’t protrude awkwardly like some bolt-on basket systems.
Compatibility
Works with:
- Ortlieb Quick Rack / Rack Three
- Tubus Logo and Vega racks
- Topeak, Axiom, Blackburn, and other common alloy racks
- Flat-top or round-top rack platforms
Doesn’t work with:
- Non-standard widths outside 80–160 mm
- Full-suspension bikes without racks
- Racks without cross-platform support (you need a “deck”)
Real-World Use and Ride Feel
We tested the Trunk-Bag RC across city commutes, overnight bikepacking trips, and weekend countryside loops. It performed flawlessly in the following areas:
Waterproofing
Ortlieb’s heritage shines here: After several rainy commutes, contents stayed bone dry. The roll-top seals tightly, and no water leaked in—even during extended downpours. This is a huge upgrade over zipper-based trunk bags that tend to seep around seams.
Convenience
Being top-mounted, the bag is easily accessible even when panniers are mounted. You don’t need to dismount to grab your gloves, map, or snack bar. Packing and unpacking is intuitive—especially for items too bulky or odd-shaped for side panniers.
Portability
The detachable shoulder strap is a quiet winner. Unclip the bag at your destination and carry it like a messenger bag. The roll-top handle also works nicely for lifting the bag in and out of a train carriage or carrying it through a shop.
Stability
On rough roads and mild gravel, the bag stayed firmly in place without any movement or rattle. Even when only partially filled, there was no sway or flap. This inspires confidence when descending or riding out of the saddle.
Pros and Cons
Pros
- Completely waterproof: roll-closure + welded seams
- Universal fit with adjustable Rack-Lock Adapter
- Quick to clip on/off without tools
- Top access is perfect for on-the-go retrieval
- Internal pocket + carabiner for valuables
- Low-profile and highly durable
- Shoulder strap + handle for off-bike portability
- Made in Germany with 5-year warranty
Cons
- External pocket is not waterproof
- Pricey compared to generic rack-top bags
- Doesn’t work on non-standard or minimal racks
- No reflective elements or light loop
Ideal Use Cases
The Ortlieb Trunk-Bag RC is a stellar choice for riders who:
- Commute daily and want to ditch the backpack
- Ride in wet, muddy, or unpredictable weather
- Mix public transport and cycling
- Need mid-volume storage for errands, shopping, or touring
- Want a rack-top bag that’s easy to remove and carry
It’s less suitable for:
- Riders with minimalist or unsupported racks
- Those seeking maximum capacity (look to panniers or rack-top boxes)
- Mountain bikers without rear racks
Comparison: Trunk-Bag RC vs Ortlieb Trunk-Bag Top-Lock
| Feature | Trunk-Bag RC | Trunk-Bag Top-Lock |
|---|---|---|
| Closure | Roll-top (hook + loop) | Lid with magnetic closure |
| Mounting | Rack-Lock Adapter | Top-Lock quick clip |
| Weight | 800g | 1100g |
| Waterproof | Yes | Yes |
| Portability | Shoulder strap + handle | Handle only |
| Price (UK) | £110 | £130 |
The RC version is lighter, simpler, and less expensive, with a more rugged closure. The Top-Lock offers one-handed mounting for fast removals but is heavier and less compact.
Final Verdict
The Ortlieb Trunk-Bag RC is a class-leading rack-top bag that delivers unmatched waterproofing, quick-mount convenience, and the trusted build quality Ortlieb is known for.
Whether you’re commuting through a British winter, heading out on a credit-card tour, or just need reliable dry storage on your errands, this bag just works. Its elegant roll-top design, universal fit, and clean aesthetics make it a compelling upgrade for any rider who wants rack-top utility without compromise.
It may cost more than your average trunk bag, but it’s built to last and backed by Ortlieb’s industry-best support.
Rating: 9.5/10 Best for: Year-round commuters, touring cyclists, and anyone who values dry gear on a rack-top platform
