The alternative to racks and panniers, seat post mounted, large capacity seat packs are now the touring and adventure cyclist standard. The Blackburn Outpost Seat Pack mounts easily to nearly any bike utilizing two velcro closures around the seat post a quick buckling system to the seat rails and is adjust for loads big or small. While it does come with its own water resistant stuff sac, the harness will also accommodate many standard dry bags for additional weather protection when necessary.
Works with many standard dry bags and stuff sacks.
Adjusts easily to larger or smaller volume cargo
Not recommended for carbon seatposts.
Daisy chain loop webbing provides extra opportunities to attach lights or other gear.
I just used this bag on a 7 day bike packing trip and it held up great! It wiggled a little bit on the seat post when I strapped it down as tight as I could, but shows no signs of wearing out. I definitely recommend it!
Starting with the positives, the harness was easy to mount to both the saddle rails and the post, it seemed to be relatively secure and stable, and I didn't really notice any swaying or movement while riding. Unfortunately Blackburn fell short in the bag retention design...literally. The two straps which extend along the top of the bag to connect to the harness and secure the bag in place need to be three or four inches longer at least to reach around a loaded bag and connect to the buckles underneath. In order to fasten the straps I had to pull on the bottom of the harness while trying to shove the bag far enough down into the "nose" to make up for the straps being too short. I don't believe the bag was overfilled as I was able to close the mouth of the bag, take two full rolls down and fasten the closure buckle. The second time I attempted to do this, the daisy chain I was using to gain purchase on the bottom of the harness tore loose from the fabric (see picture). For those of you with experience climbing or backpacking, you've probably pulled plenty of webbing that was sewn onto nylon without experiencing this and certainly not on the second use. Ultimately its a case of the bag being too long for the straps, or the straps being too short for the bag, either way its definitely Blackburn trying to save their money and not yours so you might as well buy a better product from another manufacturer. P.S. - Same as with the Handlebar bag, five stars to Jenson for making it right.
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