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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 2.9″ /73mm
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 having done more than 500km rides with my Tailfin AeroPack X Rigid Seat Pack I am truly amazed by this product.
I've done several commutes to work (~40km one way). Each time I carried with me my my laptop (14"), change of clothes and some food. The AeroPack was loaded up to its (volume) limit but still felt very good on the bike. If you load the AeroPack literally till bottom edge and if you have heavy stuff not at the bottom of the pack then there is a minimal sway but I did quite a few out-of-saddle hill climbs with it and it was absolutely negligible.
On one of these rides I was hit by some rain but no issues - my laptop was perfectly dry afterwards.
I've also done two long (140-180km) rides with the AeroPack during which I packed good amount of food, photo equipment (why not :)), waterproof jacket etc. During these rides I was hit by really heavy rain so I can ascertain that AeroPack is indeed waterproof - all my stuff inside it was perfectly dry.
After the first few weeks with the AeroPack I can say that it feels very high-quality and is indeed waterproof even in heavy rain. Taking things out of it is a breeze - super comfortable. Mounting the AeroPack on the bike as well as taking it off the bike indeed lasts 30 seconds and is very easy.
All in all I couldn't be happier with this product and couldn't recommend it more. Kudos to Tailfin team - fantastic product!
Make a First big Trip 👍👍👍👍Easy TO pack, quick TO fix, you can put a tent on it,
High quality product, easy and intuitive assembly.
The axle rubber thing needs to be fixed better.
Other than that very stable and plenty of room to carry safely anything.
Easily swappable between my two bikes.
Really high quality build.
I'm happy with it.