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Ortlieb Seat Pack

Ortlieb Seat-Pack – 11L or 16.5L

Big storage without the backpack.

The Ortlieb Seat-Pack is a staple in any bikepacking setup—keeping your gear dry, stable, and tucked in tight behind the saddle. With a lightweight, waterproof design and roll-top closure, this rear bag hauls your essentials (like spare clothes or a sleeping layer) without the need for racks or panniers.

Available in two sizes—4.5–11L or 8–16.5L—you can adjust the volume depending on the length of your trip. The built-in air valve lets you compress bulky items down to size, and the tapered shape doubles as a rear fender for wet or dusty rides.

Best part? The smaller version only needs 6cm of seatpost clearance, making it perfect for compact frames or full-suspension setups.

Why we like it:

  • Waterproof, roll-top storage with adjustable capacity

  • Compression valve keeps your load compact and tight

  • Doubles as a rear fender

  • Fits carbon and dropper posts (with care)

  • Daisy chain mount for rear lights

  • Ultra-light with reinforced wear zones

  • Two sizes to suit your ride style and frame size

Specs:

  • Small: 4.5L–11L (ideal for small frames/full-sus/dropper posts)

  • Large: 8L–16.5L (ideal for longer trips or larger frames)

  • Secure velcro mounting system

  • Waterproof and lightweight

  • Reflective 3M details for night visibility

About Us

Though we’re a bike shop that sells, builds and fixes bicycles, they’re really just the means to an end; albeit a beautifully designed means to an idyllic end. Our job most importantly is to encourage as many people as we can to get out and ride for transport and enjoyment. We'd love to make riding a bike as commonplace as your morning cup of coffee, which by the way is our other obsession.

Contact Us

Bicycle Junction is situated at 1 Marion St, Te Aro, Wellington.

Call us on (04) 385 2362 OR send us a message.