Rack or AeroPack – Which one is right for me?

Estimated reading time: 6 minutes

Rack or AeroPack: a guide to help you decide.

Rack or Aeropack. This is one of the most frequently asked questions we get here at Tailfin. It’s not surprising that the initial answer we give is almost guaranteed to be the same for every inquirer, ‘It depends on many factors but mainly what you use your bike for’. While this might seem like a blanket, vague, and all-inclusive ‘answer’, it is meant to get you thinking about what it is you wish to get out of any potential Tailfin purchase. After all, we want you to be completely satisfied that you have chosen the perfect setup to meet your needs.

Rack vs AeroPack – the key differences

First, let’s start with a bit of education as to the key difference between a Tailfin Rack and a Tailfin AeroPack. On the surface, they look very similar. Mainly because they both use the same main carbon or alloy ‘arch’ and the same connector for attaching to your seat post.

The crucial difference lies in how the arch is joined to the seatpost connector. The Rack uses a carbon or alloy top stay to complete the structure, whereas the AeroPack does away with this additional stay and instead uses the top bag as an integral part of the system.

The Rack approach allows the top bag to be removed rapidly, leaving the rack in situ on your bike. The AeroPack however has fewer parts and hence is the lightest option – but you have to take the whole AeroPack with you if you want to remove the bag from your bike.

rack and aeropack side by side
Tailfin Rack on the left, AeroPack on the right.

Rack or AeroPack: two questions to help you choose


Do you want a Tailfin system that you can use for everything from carrying the shopping, commuting to work, all the way to the occasional bikepack/tour?

Yes: Get a Rack. Choosing a Tailfin Rack system accesses the most versatile combinations we produce. You can choose exactly how you carry your luggage with a rack. As it consists of a base framework you can opt to fit any combination of trunk top bag and side pannier bag, including fitting side pannier bags from other manufacturers. 

As the bags can be rapidly removed, this choice should appeal to those riders who want the convenience of being able to take the bag/s with them when arriving at the office, accommodation or supermarket.

Riding style

Are you buying the system mainly for bikepacking or touring?

Yes: Get an AeroPack. The AeroPack is designed to be the most simple and user-friendly of all Tailfin systems. Think of it as the most stable and secure seatpack-style bag you could ever fit to your bike. It has a less intricate mounting system than a Tailfin Rack and AP20 Trunk Top Bag combo, which makes it lighter and provides complete reliance when off-road. As an additional benefit, because the bag is an integral part of the structure, noise and rattle are eliminated when really pushing the boundaries of where you can explore.

Those two questions will hopefully give many of you the answer you are looking for, but if not, here are some other considerations that will help you close in on the perfect setup:

Rack or AeroPack: other considerations

Tarmac vs off-road

Are you mainly riding tarmac, or will you be using the system off-road for your adventures?

If your riding consists predominantly of on-road tarmac-based travelling, the demands on your bike and luggage-carrying options are significantly different to those imposed if you spend a lot of your time on gravel or more serious tracks and trails.

Smooth(ish) surfaces normally provide minimal problems for your choice of setup and as such both Tailfin Racks and AeroPacks are equally suited to the task.

If you plan on venturing off-road via a gravel bike or mountain bike, then one thing to consider is that the AeroPack’s fully integrated design and use of fewer component parts is less susceptible to rattling and has fewer dirt trapping areas than the corresponding Rack versions. 

Capacity needs

How much do you want to carry and how do you want to carry it?

You can technically carry exactly the same amount of kit with both a Tailfin Rack and AeroPack. When chosen with optional side pannier mounts each setup can carry up to 27 kilograms of luggage via top bag and side pannier bags. Volume-wise (when using Tailfin bags), this equates to 64 litres of storage space. 

Where the division becomes obvious is if you would like the option to carry your own chosen storage solution such as a dry bag instead of a Tailfin top bag. This is simply not an option with the AeroPack so if you want to strap on your own bag it can only really be done with a Tailfin Rack.

What can you fit in a Tailfin system? We experimented to find out how to pack for multiple occasions and what to use.

Weight vs versatility

If you plan on undertaking an ultra-distance race, want to do some fast touring on your road bike, or simply want the lightest Tailfin setup we produce then you need to go for an AeroPack – it’s nearly 150 grams lighter than the equivalent Tailfin Rack. If versatility is higher on your list of priorities than weight then you should choose a Rack. 


Do you plan on locking your bike up anywhere outside?

A Tailfin Rack system has the advantage if you often leave your bike locked outside whether it’s at the office or outside the supermarket thanks to the simplicity of being able to remove the bags and leave the rack in place. You can of course remove the AeroPack quickly and easily but you will need to carry the full system, arch included, if you do take the AeroPack anywhere. 

If you plan on often leaving your new Tailfin Rack on your bike when locked outside we would recommend you opt for direct frame mounting to maximise the security of your rack when your bike is left outside for any period.


If you’ve got this far and you’re still not sure, the good news is that all of our systems are modular – meaning the rack and the AeroPack share a lot of the same parts. It’s easy to convert the Rack to an AeroPack or vice versa, simply by adding a couple of smaller parts.

Say you wanted to transform your Rack system into an AeroPack, you’d need to have an AP20 Top Bag and replace the hardware with the AeroPack Connector Parts. If you have an AeroPack and want to convert it to a Rack system, AP20 Trunk Connector Parts, and a Carbon or Alloy Top Stay.