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The AeroPack S is our all-in-one integrated rigid seatpack, with minimum weight and maximum aerodynamic advantages.
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
This is it: the ultimate minimalist rigid seat pack system. Aimed at the performance cyclist who wants to go fast either on or off-road, it is an integrated top bag with no side pannier mounts.
Seat packs are great. The AeroPack is awesome. We take everything that you love about seat packs and pannier bags and combine them to create the ultimate way to carry your gear.
Don’t let your gear slow you down. The AeroPack is designed for aero advantage, and the stiff, rigid frame keeps your ride smooth and free from tailwag.
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.
The rigid parabolic carbon arch connects solidly to the AeroPack bag with 6061-T6 aluminium pivot system.
The pinnacle of ultra distance racing is the Transcontinental Race. Used in both TCRNo6 and TCRNo7, the AeroPack has seen some serious miles and excelled in arduous real-world testing.
The AeroPack Alloy S now features three stainless steel cage mounts on each side. They are industry standard (M5) with a spacing of 64mm between centres, so you can screw on any cargo or bottle cage for more carrying options.
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 AeroPack makes it easy to access your gear on the bike thanks to a roll-top opening and direct access pocket.
The Tailfin Axle Mount System means you can fit and remove the AeroPack in seconds.
The wide mouth, top opening design means you spend less time packing your gear. The time you spend moving is as important as the time you spend stopped.
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
The AeroPack is rigid and light, meaning no tailwag and a smooth, stable ride. It’s almost like you weren’t carrying any gear at all.
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)
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.
High performance laminate and high frequency welded seams make the AeroPack completely waterproof.
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.
A zipped pocket keep a few essentials handy.
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.
With cargo and water cages mounted to the side of the AeroPack Alloy S, you have greater versatility to carry what you want, where you want.
AeroPack Carbon S
AeroPack Alloy S
4″ / 100mm
3.5″ / 90mm
3″ / 75mm
Axle or Frame
Any seatpost – inc. Aero
Around 30 seconds
Anti-theft screws included
Yes, Max load per side 4.5kg
*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.”
“Tailfin’s AeroPack S is one of the best rear luggage options for serious bikepacking (and commuting) ever tested. It is expensive but its simplicity, ease of use and pleasing design make you forget the price within the first ride.”
“It strikes a sweet spot between weight, space, and usability…the Aeropack’s execution is so much better than anything I’ve ever seen.”
Ok it's expensive - I went for the cheaper alloy version with direct frame mounting but I can opt for quick release mounting kit in the future if required. I bought for my gravel bike for short bikepacking trips. The bag is easy to pack and secure (lot easier than my last seatpost mounted bag) and the 2 pockets are real handy. There is no movement in use and as you can't tell it's there I have just left it on the bike as it's handy for spare clothing, food (stove/coffee filter!) etc on a longer ride. I bought the rear light attachment from Tailfin and a Cateye light holder screwed to that easily. I bought the separate extension piece to fix to the seatpost (I had 120mm protruding seatpost) and I think that will be essential for most people to keep back clear of legs and make it easier to load. I think that should really be included with the bag and rack or be a bit cheaper to buy as an extra. I found the 3mm frame fixing bolts easily rounded and 4mm bolts would be better in this application. These are minor gripes and all in all I think it is a worthwhile purchase with lots of use this Summer and favourable comments from others.
My experience is with the "AeroPack S Rigid Seat Pack" alloy version on a road bike.
I wanted to buy the carbon version but it was not available at the end of July and so I decided on the alloy. Quick releases were also not available and I had to make with 3D printed media. Soon I will buy the original accessories. It is very light and well made, both the frame and the bag. Very intelligent all the mechanisms for anchoring to the bike that make it very easy and quick to install and stable while driving. During the ride there is no annoying effect, the bag is rigid with the bike. For my trip the bag was full, repair tools, snacks, clothes and a tablet. It wasn't that easy to close the bag at first, but by pushing down to let the air out, I was able to roll the edge three times. Enough to close the bag on sunny days. Unfortunately the bag touched the underside of the saddle and after three days of rubbing the material was so worn that it was punctured. It wasn't a good find but it is.
The direct access pocket is not as functional as I thought, and the stash pocket even less because it is too small. I wanted to use it for the smartphone or at least for the powerbank but you can store, at most, a nokia 3310 :-).
The last negative note concerns the aesthetics of the fast release dropouts (which I have not purchased but which I can see in the photos on the website), each component of the frame and bag is designed to guarantee functionality and aesthetics and everything appears perfectly integrated but the fast release dropouts seem like jewels of mechanics placed at the last moment.
However, I am very satisfied with the product and recommend it.
perfekte Taschevfür Mehrtagestouren. Teuer, aber dafür leicht zu reinigen.