AP20 Trunk Top Bag


Size: 20L

The AP20 Trunk Top Bag is a 20L roll-top bag that attaches to any Carbon or Alloy Tailfin Rack in a matter of seconds.


Top Bags

AeroPack Trunk




20 litres



Bag Dimensions

435mm Long x 165mm Wide (Rear) / 130mm Wide (Front) x 400mm High

Seam Type

High Frequency Welded

Fabric Material

Nylon & Hypalon Laminate

Max Load

9kg / 20lbs

Max Laptop Size


Fitting Time

10 seconds or less

* Maximum loads listed for on-road riding. Off-road loads will be lower depending on the severity of the terrain, etc.
** These weights do not include the removable stacking straps (50g) or the removable bag backbone cover (40g)

Media Reviews

Top tip: Try searching for your bike make/model below to find others using this product on your bike.

Customer Reviews

Based on 92 reviews
Andy Woodward (SG)
Bike: Sonder Camino
Riding Style: Bikepacking, Commuting, Touring
A Perfect Rig setup

Like many who buy a Tailfin product love it so much they get hooked into the family of Tailfin products. I started with Top Tub Pack large and have to say it's never left the bike. I bought the alloy racks as I want to put my Ortlieb bags on it and it works perfectly . AP20 Trunk Top Bag. So much space in it perfect for storing Al my camping gear and finally a couple of mini panniers for the forks which are perfectly sized and balance the rig perfectly. I'm just waiting a conversion kit for the new mounts for the forks then I can do away with my front rack completely. Thanks Tailfin your awesome....

JohnK (GB)
Bike: Ribble CGR
Riding Style: Bikepacking, Touring, Other
AP20 trunk bag

A great product, securely attaches to rack. Bag is nicely made but can be a little tight under the saddle.
I’ve been looking for additional bag options such as frame packs and handlebar bags. It’s a shame Tailfin haven’t come up with any products yet because there does appear to be an opportunity for them to provide something of comparable quality to the trunk bag.

Hi John,

Thanks for taking the time to provide your great feedback! We do offer the Topstay in a 'Long' version which provides an additional 50mm of clearance for the AP20 Topbag and i've been in touch via email on how to make this change.

All the best,


Julien Deneuville (FR)
Bike: Canyon Inflite CF SL
Riding Style: Bikepacking
Nice replacement for my old saddle bag

My old saddle bag is nearly 10 years old, and also still intact, it's not waterproof. Plus my riding evolved, and I ride a lot more gravel than I did back then: the saddle bag tends to move a bit, even when neatly secured. Very happy with the Tailfin system: bags are well thought, waterproof, and the rack makes them very stable. They seem quite durable as well, so I hope to use these for the next 10 years too!