Ortlieb Seat-Pack

Get ready for your next bikepacking adventure! The Ortlieb Seat-Pack is a key item in any bikepacking setup, offering spacious, waterproof storage that mounts securely to your seat stem with strong Velcro straps. Projecting backwards, it doubles as a rear fender while keeping contents such as clothing, food, or gear safe and dry.

Available in two sizes (11L and 16.5L), the Seat-Pack features roll closures on the sides to adjust volume, and an integrated valve to compress soft gear for a compact fit. Reinforced fabric at contact points ensures durability, while reflective 3M Scotchlite elements and a vertical daisy chain for a rear light enhance visibility. Lightweight yet robust, it’s suitable for hybrid bikes, mountain bikes, road bikes, and e‑MTBs.

The compact model requires only 6 cm of seat stem, making it ideal for smaller frames, full suspension bikes, and adjustable seat posts.

Product Features:

• Capacity: adjustable 4.5–11L or 8–16.5L depending on model

• Waterproof construction with roll closures

• Integrated valve for compression of soft gear

• Velcro straps for secure mounting to seat stem

• Doubles as a rear fender

• Compact model fits smaller frames and suspension bikes (requires only 6 cm seat stem)

• Reinforced fabric at seat contact points

• Vertical daisy chain for rear light attachment

• Suitable for carbon seat stems

• Lightweight design (approx. 345 g for 11L)

• Reflective 3M Scotchlite elements for visibility

Ideal For: Bikepackers seeking waterproof, adjustable storage with compact fit options for a wide range of bikes.