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The AeroPack Carbon X is our all-in-one integrated rigid seatpack, with side mounts for added versatility.
What are the differences?
The models differ by material and weight:
AeroPack Alloy X = Alloy Arch
AeroPack Carbon X = Carbon Arch
AeroPack Alloy S = Alloy Arch
AeroPack Carbon S = Carbon Arch
What are my mounting options?
Axle + Fast-Release Dropouts: We ship you a Tailfin Axle to swap out for your own, our Fast-Release Dropouts allow you to mount/dismount the rack from your bike in seconds.
Frame Mounts + Fast-Release Dropouts: We ship you Frame Mount Adaptors which attach to your bike’s frame mounts, our Fast-Release Dropouts allow you to mount/dismount the rack from your bike in seconds.
Frame Mounting: You screw the rack directly onto your frame mounts, without a fast-releasing mechanism.
Which Axle do I need?
If you need help figuring out which axle type to use, please use our guide posted here as a reference.
Most Bikes Use a Quick-release Axle (Pictured above-right)
Use the guide below ONLY if your bike uses a Thru-Axle. If you’re unsure – see above.
Thru Axle 12x142mm 1.0mm Pitch
*for Open frames you will need an axle cap also, found HERE
Thru Axle 12x142mm 1.0mm Pitch – Speed Release (this is a double lead axle)
Thru Axle 12x142mm 1.5mm Pitch
Thru Axle 12x142mm 1.75mm Pitch
RAT Systems (RAT Thru Axle 12x142mm), you will need to order a 1.5mm thru axle, along with this adaptor part.
Thru Axle 12mm 1.0mm Pitch
Thru Axle 12mm 1.5mm Pitch
Thru Axle 12mm 1.75mm Pitch
The AeroPack X adds side mount features so you can take that little bit more.
Seat packs are great. The AeroPack X is awesome. The AeroPack X takes it to the next level. We take everything that you love about seat packs and pannier bags and combine them in to the ultimate way to carry your gear.
The side mounts on the AeroPack X arch allow you to attach various bags and accessories so you choose to take that little bit (or a lot) more.
The pack is constructed from a combination of Nylon and Hypalon laminates that are High Frequency welded to create a pack that is 100% waterproof.
Watch the deep dive video and get hands on with each and every component. See the modularity, hear the satisfying clicks as components move together and get a feel for the overall size.
One of the key advantages of the AeroPack is the ability and ease of accessing your gear on your bike.
Check out Francis Cade’s post trip review after cycling 3000km across Australia.
The Tailfin Axle Mount System means you can fit and remove the AeroPack in seconds.
A zipped pocket keep a few essentials handy.
The AeroPack X rack will fit nearly all tyre sizes:
26″ – Up to 4″/100mm
27.5″ – Up to 3.5″/85mm
29″ – Up to 3″ /75mm
One of the challenges with any roll top bag is the speed with which you can enter the main body of the bag. The Direct Access Pocket allows you to get in to the main body of the bag without opening the roll top.
Replace your axle with a Tailfin axle to mount the Tailfin rack. Most bicycles use a quick-release axle, however, we also support the new Thru Axle standards (e.g. 12×142, 12×148, E-Thru, Syntace X-12, etc)
It’s now possible to attach our racks directly to frames with eyelets. The quick-release rack dropouts are modular so you can choose to use them, or not.
With the Third-Party Pannier Adaptors, it’s possible to fit different brands of bike bags to the X Series pannier rack.
The seatpost connector is kind to carbon and designed to wrap around any size seatpost from 25mm through to a 3″ deep aero. So no matter what bike you ride, you can securely attach and quickly release the AeroPack.
With the AeroPack light mount it enables you to fit any seatpost light to the back of the AeroPack for maximum visibility.
The Frame Mount Adaptor set allows you to mount directly to your frame mounts but still keep the Fast Release Dropouts for easy on and off rack mounting.
The AeroPack seat post connector gives a little more breathing room behind the seatpost. Great for those with smaller frames.
AeroPack Carbon X
AeroPack Alloy X
4″ / 100mm
3.5″ / 90mm
3″ / 75mm
9kg per side
2x SL or UD bags
Axle or Frame
Any seatpost – inc. Aero
Around 30 seconds
Anti-theft screws included
*These weights do not include the removable stacking straps (50g) or the removable bag backbone cover (40g)
“Beautifully made, fully waterproof, mounts in seconds, more capacity than a seatpack, AERO… it’s a lovely thing that’s a joy to use.”
“It strikes a sweet spot between weight, space, and usability…the Aeropack’s execution is so much better than anything I’ve ever seen.”
After scouring the web plus several e-mails back and forth with the Tailfin staff I decided to buy an Aeropack X plus the seat post extender, third party pannier adapters and light mount. The bag is nice and confidence-inspiring, but I have quite a bit of mixed feelings overall.
First, there is the buying experience. I'd rate that quite low. For some reason it is impossible to order things that are not in stock. This makes absolutely zero sense to me. Combined with the fact the accessories seem to be in stock only sporadically, and with re-stock deadlines missed repeatedly, it makes for a frustrating experience, continuously checking for stock. I also found the specifications on the homepage lacking (solved by e-mails). Related, I also found the shipping slow compared to competitors. The best part of the buying experience is the customer service, which is prompt, helpful and friendly.
Second, the assembly process. I found the general instructions OK. However, this didn't remedy the fact that alignment of the threads in the metal frame and the corresponding holes in the fabric was quite poor. This made installing screws much harder than I anticipated. In the end I needed a second person stretching the fabric while I screwed in the various screws. Things didn't get better when I received the light mount, which had the further complication of being manufactured with the incorrect hole size. A bad thread didn't exactly help. Much cursing followed. In the end I had to drive a screw in from the inside of the bag to clear the bad thread. I also would like to see instruction for all parts be made available - e.g. third party adapters does not seem to have any instructions (however trivial it may be, it would still help). W.r.t. screws: Adding a smooth bore for the first couple of mm to each thread hole might allow the screws to slot into place, preventing cross-threading and easing assembly.
Third, the size of the bag. The capacity is listed as 20 l. Let me just put it like this: Either a competitor known for their panniers is understating the volume of their bags or Tailfin is overstating theirs. There is no way I can cram the same amount of stuff in my Tailfin as in a standard 20 l pannier (I checked). Granted, the bag does soak up a lot of stuff, and the straps allows one to strap e.g. tents on the outside which is a nice addition. This is problem arises in part by the pack to seat post separation. I ride a size L Giant Revolt, which almost all the seat post visible and my saddle in a neutral fore/aft position. Even with the extended seat post adapter the front top of the bag hits the back part of the saddle, effectively preventing me from utilizing a lot of the supposed capacity. This is frustrating.
The bag itself, once bought and assembled, is really nice. The process of installing on/removing it from the bike takes about two tries to get right, and from then it's very easy. Packing is made easy by the wide opening. Straps and buckles are well thought out and seem to be good quality. I might be a bit worried about the durability of the fabric, specifically the part rubbing my saddle, but time will tell. The ride quality is very, very good compared to panniers and a rack. Both regarding wagging and aerodynamics. I just wish that it sat further back, to allow using the full volume, and for easier (un)packing with the bag mounted on the bike.
A bunch of the launch videos from Tailfin teased the release of anything cage-style cages being released. I would really like to see this product added to the line up. Having invested in this nice system, I would prefer not adding panniers, but the bag just isn't big enough for me, even with a handlebar roll and half-size frame bag.
TLDR: Very nice bag, frustrating buying and assembly experience, capacity effectively smaller than hoped. Good ride quality.
My partner is very much liking her AeroPack X, and I will most likely be buying one for myself in the future. I chose the AeroPack for her as she wanted an aerodynamic storage solution for her road bike, and the aeropack had the best combination of that, volume, and overall structural rigidity. The bag and parts quality is high, and the capability to take on/off the bike quickly is a win. The overall design is a winner and has no match on the market.
A few quips, as I could not give this product a 5 star rating. The aluminum screws are a bit soft, and I was afraid of cross-threading or stripping them upon installation. Be careful here. One did start to round off at even the slightest angle of the hex wrench. The bag holes did not line up perfectly with feeding the screws through and into the internal frame, which caused an awkward attempt to screw in from one side while aligning with my head in the dark, deep bag from the other. Maybe some more refinement needed there.
We have Hexlox on all of our bikes, and I was disappointed to see that the thru axle was not compatible with these products or any other security platform I have seen. While I may be able to recess a magnet into the axle to secure a Hexlox nut, the recess is so deep there would still be room to insert enough of a hex wrench to unscrew the axle. IMHO this area of the product could be made much better with a bit of consideration to security. I'd like my rear wheel to remain on the bike when locked up outside.
Finally, I need to find a way to secure the stacking straps when the bag is empty and rolled down tight. I have not found a way to tighten them enough to not hang loose and flap around. I know they are removable, but it's a bit of a pain to thread them back through the slits in the underside of the bag when you need them.
Overall though, this is an excellent product for the most important bits...getting out and riding. As I said, Ill probably be purchasing another to share across my two bikes...in carbon of course. The price is high, but worth it. It's not a perfect product, but it's overall design sets it apart from anything else on the market.
Easy to assemble. Very solid bags
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