Get ready for your next bikepacking adventure! As a key item in your bikepacking setup, the ORTLIEB Seat-Pack comes with Velcro straps to enable convenient and secure mounting to your seat stem. Projecting backwards from the seat stem, your Seat-Pack also serves as a rear fender. The spacious, waterproof Seat-Pack keeps its contents (e.g. an extra set of clothes) safe and dry. Depending on how long you plan to be away and your Seat-Pack model, you can conveniently adjust the volume of your pack from 8 to 16.5 liters or from 7 to 11 liters by adjusting the roll closures on the sides. An additional valve allows you to quickly and easily compress your soft gear for a more compact fit. Your Seat-Pack also serves as a replacement backpack when you’re out on a day trip, no matter whether you ride a hybrid bike, a mountain bike, a road bike or an electric mountain bike. The Seat-Pack is available in two sizes.
Thanks to its elastic drawstrings on the top it offers additional space for items you need to be able to access quickly (not on 11l slate version).
The smaller of the two models needs only six centimeters on your seat stem. That’s why the more compact model is ideal for smaller frame sizes, full suspension bikes and adjustable seat stems.
Reinforced fabric at all points of contact to the seat
Vertical daisy chain for rear light
Also suitable for carbon seat stems
Lightweight design
Four 3M Scotchlite reflectors available for full extension
Attachment requires 14 cm of space from the seat post
The approximate size of the packed product or the sales package is 400 x 200 x 250 mm.
Easy to attach to the bike and stays firmly attached.
Timo S.verified buyer, 10.9.2025
Overall rating
☆☆☆☆☆
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Spacious saddlebag and attaches securely to the saddle even with a large load. Simple attachment and if there is no sand etc. in between, it will not wear out the bike surfaces.
Anonymousverified buyer, 1.9.2025
Overall rating
☆☆☆☆☆
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It holds a lot of stuff! Attaching it, especially when it's full, takes a bit of time and patience, but that's part of the nature of these bags, luckily you don't have to remove it often.
klaus o.verified buyer, 29.8.2025
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It stays really firmly in place, doesn't wobble even on trails.
Anonymousverified buyer, 29.8.2025
Overall rating
☆☆☆☆☆
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Does what it promises. Firm attachment, stays with you well on the road. A week's worth of stuff fits inside well. This isn't something you can operate particularly quickly in the middle of a trip, but that's probably not the purpose. I wouldn't take this with you on a really rough day, at least not without additional fastening with loose straps. High-quality product, should last.
eli...@...omverified buyer, 13.8.2025
Overall rating
☆☆☆☆☆
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Functional bag, stable attachment
Pietari S.verified buyer, 7.8.2025
Overall rating
☆☆☆☆☆
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It is the best and highest quality rear bag out of the few models I have used. Attaching it to the seat post requires some space between the seat post and the top tube, this is worth considering when buying.
Jussi L.verified buyer, 7.8.2025
Overall rating
☆☆☆☆☆
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It works. Stable and doesn't interfere with driving in any way.
Laura L.verified buyer, 6.8.2025
Overall rating
☆☆☆☆☆
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Easy to attach, unnoticeable while driving and a spacious bag for trips!😍
Anonymousverified buyer, 31.7.2025
Overall rating
☆☆☆☆☆
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Works well and fits much longer than necessary for a trip.