Ortlieb Seat-Pack 16.5L

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Works as expected and at the very least significantly lightens the backpack, if not completely eliminates the need for it. The fastening straps that come around the seatpost are reasonably stiff, so it takes work to get them taut at the very end. Sometimes I even wonder if I should have invested more in that Boa roll-tightening model. I don't know the method used to measure the volume. I bought this locally so the available space was visible. When read on the screen, 16.5 l may sound large, but in reality it is not.

Ortlieb is well know for their high quality products and this bag is no exception to that!

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Perfect, Ortlieb

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Really good, withstood demanding terrain in the wilderness of Pöyrisjärvi. An additional strap was necessary when the bag was packed full. A little annoying that there is no separate detachable dry bag, but I chose to order this version myself.

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Handy bag that can be placed under and behind the saddle. It's good that it can be used in many sizes, i.e. 5 l also works well.

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6/5, guaranteed Ortlieb quality, cleverly designed attachment and sturdy packaging. If you pack more stuff, it's good to pull some kind of support strap from the back of the bag under the saddle to support the back.

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Very good bike-packing equipment!

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I haven't gone on a long run yet, but it looks like a good bag and I'd like to go cycling with it. High-quality feel and good appearance. I compared different ones and this one seemed the best so I ended up buying it.

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One trip behind and based on that, I could also buy the bag again. The bag fits well and stays firmly on the seatpost quite stable. The bag can be tightly packed by squeezing out excess air through the air valve, even if the bag is not full. It requires a little adjustment and tightening of the straps when attaching and removing the bag from the bike, but the system is functional. When fully packed, a tensioning strap sold separately is necessary.

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Easy to attach. Reliable and functional as Ortliebit always is