A compact, clever frame triangle organizer
The Zipper Delta bikepacking bag is the perfect solution for riders who need handy storage space but don’t want to sacrifice carrying a water bottle in the main frame triangle.
Thanks to its clever shape, the Delta fills the space under the top tube and along the seat tube, leaving the down tube completely free for a standard-sized water bottle cage. It works brilliantly as an everyday “smart tool pack” or as a dedicated storage pouch for essentials on longer expeditions.
Organization
The bag features two pockets for small accessories:
✅ External mesh pocket:
Located on the other side – perfect for grabbing a quick snack while riding.
✅ Internal pocket:
Tucked away just under the main zipper – ideal for small items like loose change, keys, earphones, etc.
What fits inside?
Although smaller than the Tangent model, the Zipper Delta surprises with its capacity. You can easily pack a power bank, cables, a spare inner tube, tire levers, a mini pump, a multi-tool, energy bars, a wallet, and keys. Everything stays right at your fingertips without having to reach for a saddle bag or jersey pockets.
Just like our larger models, the Delta is crafted from highly abrasion-resistant Cordura® TPU fabric. The TPU coating ensures the material is fully and permanently waterproof.
The Delta can be mounted either at the back, between the top tube and seat tube, or at the front by the steerer tube.
The section of the daisy chain webbing that doesn’t press against the frame can be used to lash extra gear outwardly, such as a spare inner tube or a lightweight jacket.
Mounting system
We have equipped the entire contact edge with a daisy-chain loop system, allowing you to position the Velcro straps precisely to best fit your bike’s geometry.
The kit includes four mounting straps lined with a soft material that won’t scratch your frame.
Water resistance
The bag closes with a durable, splashproof zipper, making it easy to access the contents even while wearing cycling gloves.
Reflective Crosso logos on both sides provide enhanced visibility and rider safety after dark.
⚠️ Water resistance note
Since this bag is constructed using a sewing process, the needle holes along the seams are not 100% sealed. This means the Zipper Delta handles moisture and moderate rainfall exceptionally well, but it is not designed for full submersion or prolonged downpours. We recommend placing sensitive electronics in an additional dry bag just to be safe.
