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Your cart is empty.Keys, check. Wallet, check. Energy bars, check. Hydration bladder, check. The outpost frame bag is the perfect companion for your all day pleasure ride or your week-long adventure ride. An expandable bottom compartment accommodates more mission critical gear.
George Coghill
September 7, 2025
I've only just installed this on my Specialized Crosstrail (XL frame), but the Large size is great, and fits the frame very well when opened all the way.The bag is of a higher quality than I expected, as are the zippers. Zippers seem weatherproofed/rubber-seamed. Nice long side access pocket on the left, large compartment opening on the right. Right side also has small stretchy outer stash pockets, might fit some small snacks. Inner compartment has a Velcro divider flap to loosely section/divide items top/bottom.I have a 3L water bladder, my bike lock, pump, and plenty of room for some other items like a battery pack, lights, etc. if needed. I primarily bought this to get the backpack (and water bladder) off my back, and it does the trick. See my photo showing the top-down view — no issues with the bag being too wide while riding, even with all that stuff crammed in there.The opening to allow cables or a drinking tube to exit the bag is nice, but it's angled in such a way (facing towards the rear) that the tube has to wind back and forth to exit. It works, but opening facing forward would work better I think. A very small complaint. I needed to buy an extension for my water bladder hose so it reached to a comfortable length to drink from while riding.Plenty of attachment loops on the bag, to use with reposition-able Velcro loops to attach to your frame as needed. Worked great for me.I had been unimpressed with any of the other reasonably-priced, non-custom frame bags available. I even looked into a custom frame bag. But for the price I paid for this, I am very happy with the bag and will definitely consider this Blackburn product line for future bag purchases if it holds up over time as I put it into actual use.
melissa salmon
August 11, 2025
I am so glad I purchased this bike frame bag. I hardly been searching for longer then I would like to admit for a frame bag for a new bike I purchased. I knew I wanted a frame bag that was large enough to hold 2 liters of water for long road/ gravel rides. This holds my 2 liter platypus water sack, as well as a light puffy jacket, few granola bars and my cell phone and bike tool in the side pouch. The side pouch is suitable for a phone, keys, etc. The main pouch is expandable ( I just leave it expanded) and has a divider. The whole bag is very durable, the zipper performs well and the installation was a breeze. Just make sure you measure your bike frame first, as it is crucial to obtaining the correct bag for your bike.
Travis Baldwin
July 29, 2025
I love this bag. For the price its very sturdy and accomodating. The bungie flaps on the side work great for my wallet and phone when I dont have it mounted to my handlebar. I replaced the velcro and tension straps that came with it and now attach the bag to my frame using 3 bungie cords of correlating colors to lace the bag and hold it there a little more evenly. Theres a matching top tube bag and also a rolltop/dryroll saddlebag that blackburn sells that matches this as well. The expansion feature works well and theres a velcro middle section that functions as a shelf within the bag. Easily carries several tubes, a pump, a wallet sized first aid kit, my lock and chain, and a few other tools with room to spare. Also the zippers open from the front to the back in case you should need to run a wire from a portable battery in your framebag to your phone/headlight/etc on your handlebar.
hydroguy
July 29, 2025
I agonized over which frame bag to buy based on all the different brands and sizes available. I wanted a bag that would maximize my luggage carrying capacity in the open triangular space between my top tube and bottom of frame for long bike tours, so I purchased the Large Blackburn Outpost Frame Bag. When it arrived, I was initially disappointed because it seemed too small for my XL-size bike frame, and too large for my wife's small bike frame. When fully opened, the large bag extended all the way to the bottom of the seat tube on my wife's bike and interfered slightly with her chain sprocket. Rather than returning the bag, I put it on my XL-size frame (it was 5 inches above my chain sprocket when fully extended), packed it full, and took it on a long ride. Even though the bag was slightly smaller than I wanted, I was very impressed with its stability and sturdiness so I'm going to keep it for bike touring and every-day use. For the large bag, you need at least 19 inches of space from your seat tube extending along the bottom of your top tube towards the front of the bike. The front of the bag then drops straight down approximately 3 inches in its front so you need to make sure you have at least 3 inches of space between your top tube and the bar that comes up from the bottom towards the front of the bike where the front of your bag is going to be. The large bag when fully opened extends approximately 10.5 inches down along the seat tube, so make sure you have at least 10.5 inches of space along the seat tube between your top tube and the top of your chain. The width of the bag seemed perfect. It was very close but didn't rub my legs when pedaling when it was completely full. I didn't purchase the medium sized bag but the website says the medium is 2 inches shorter in length than the large, so you probably need at least 17 inches of space extending from your seat tube along the bottom of your top tube towards the front of the bike to fit the medium bag, with all the other dimensions being the same as for the large bag.The Blackburn bag may not fit as well as more expensive customized-made bags, but the Blackburn costs a lot less, is very sturdy, and designed well. I haven't tried it in the rain, but would expect it to keep light rain out......but would put my precious belongings in a plastic bag inside if I encountered heavy downpours.
alfred hanna
July 25, 2025
I really wish I would've kept this product, but it is too big for the location on my bike because it blocks access to both water bottles. In fact, if you use big water bottles, the taller types it won't allow them to be put on because it's too big if your water bottles can go somewhere else and you need to carry a lot of stuff. This is a good way to go it's a really well-made product.
sarina
July 16, 2025
Just finished a tour of the Baja with this frame bag as part of my bike touring setup. Excellent quality, fit and usefulness. I was actually surprised at how good this piece was. It's just under 7 litres when expanded, and although not a huge amount of space, it took all of my t-shirts and soft items, freeing up space elsewhere. It became an integral part of the set up and I'll be using this for years to come on future rides. There have been some reviews stating it is not the actual size of 19.5". This is true as I measure 18.75". This is not a problem as far as form or function is concerned IMO.
B-dog
May 29, 2025
Love the size and look. Well built and very convenient
Fred
April 8, 2025
Utilisé pendant 7 jours sur un trip en velo. Tres bonne qualité. Ne gene pas les jambes quand on pedale. Accès facile par fermeture éclair. Une grande poche principale (2 chambres a air, 1 trousse à pharmacie, 1 boîtier de lunettes y logent sans pb). 1 petite pochette laterale, pratique pour un couteau ou des papiers d'identité ou téléphone, et des petites pochettes extérieures ouvertes pour y mettre les barres céréales!!
カスタマー
April 7, 2025
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Rich
January 6, 2025
This is a great frame bag, especially for the money, well made and fits plenty in. I would definitely recommend this bag especially if you are just dipping your toes into bikepacking. You definitely won't regret buying the blackburn frame bag.
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