Ortlieb Seatpost-Bag 4 Liter (New)


Versatile and lightweight: the Ortlieb Seatpost Bag can be is super easy to install. No tools required and just one single step to install or remove the waterproof, PU coated nylon and Cordura® bag. The integrated mounting allows quick change from bike to bike. The roll closure with elastics ensures safe closing of the bag and allows tight packing. The nice 4-liter size may even be big enough to replace a backpack on a longer trip. This bag will also help protect the rider from splashes and dirt.




  • Lightweight seat post bag with integrated mounting
  • PU-coated nylon and Cordura fabric
  • Ideal for day tours by mountainbike or roadbike
  • Adjustable rachet for mounting to circular seat posts
  • Do not use on carbon seatposts!
  • Adjustable closure for fixing to round seat posts
  • Can be taken off quickly and single-handedly
  • Roll closure with elastics for tight fixing and minimum dimensions
  • Size M with 2 flat integrated mesh pockets and elastic cords on top for fixing additional equipment
  • Strong illuminating 3M Scotchlite reflector for more safety in the dark
  • Fixing for optional rear light
  • When biking without fenders, the bag keeps off dirt and water
  • Maximum load: 2.5 kg/6.6 lbs. (size M)
  • Contents: Seatpost Bag comes with integrated mounting


  • Height: 5.5 in
  • Width: 13.8 in
  • Depth: 5.9 in
  • Volume: 4L
  • Weight: 15 oz

Additional information

Weight 1 lbs
Dimensions 6 × 14 × 6 in
Select Color

Black, Blue

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