Stability built in
Most frame packs try to sit a flat surface against a round tube resulting in instability. The V-Mount system cradles a rounded tube completely eliminating prevent bag roll.
Any bike, Anywhere
We shaped the Downtube Pack to integrate well regardless of where you choose to place it. Flat, structured sides limit interference…..
Customisable compression
Compress contents to stop rattle or move the pack away from the tyre for added clearance.
Made to fit
User positionable V-Mounts allow the Downtube Pack to fit around more restrictive hardware such as bottle cage fixings and suspension systems.
Specification
Model | ||
---|---|---|
Model
1.7L V-Mount Pack |
Model
3L V-Mount Pack |
|
Riding Style
Road & Gravel |
Riding Style
MTB |
|
Weight
210g |
Weight
277g |
|
Maximum Load
3kg |
Maximum Load
3kg |
|
Bag Construction Material
420D Hypalon/Ripstop Nylon |
Bag Construction Material
420D Hypalon/Ripstop Nylon |
|
Waterproof
100% |
Waterproof
100% |
FAQs
The 1.7 litre Downtube Pack has been specifically designed and shaped to work with the geometry of a typical road or gravel bike.
Both 1.7 litre and 3 litre Downtube packs are suitable for use on a typical mountain bike - it just depends on how much extra kit you want to carry (see Packing Guide below).
We do not recommend fitting a Downtube Pack directly to the forks of your bike.
We do not recommend fitting a Downtube Pack directly to the arch of your Rack or AeroPack.
Absolutely. We designed the Downtube system around the dimensions of most common cargo straps such as Voilé. We would always recommend using the straps that are supplied with the V-Mount Pack as they have been designed specifically around use with bike tubing.
Yes. The soft rubber boot covering the V-Mount is designed to conform with frame tube shaping so will cover a boss if required. Each pack is also supplied with four rubber boss covers that can be used instead of the existing bolt in order to increase grip.
On paper a Downtube Pack is heavier. However when you take into account the additional straps and cargo cage required to mount a Cage Pack the actual weight difference is very minimal.
We created the Downtube pack primarily for riders with bikes without additional mounting points on their frames but also for mountain bikers who require a little more weatherproof storage. It is aimed primarily for use in and around the main frame of the bike and requires no additional parts to attach, unlike a Cage Pack. We would recommend a Cage Pack over a Downtube Pack anywhere you would normally fit a cargo cage, i.e. on forks and the arch of a Tailfin Rack/AeroPack.
Capacity is measured by filling a test sample with water and setting the closure to the minimum setting required for complete waterproofing (two folds of a roll-top closure) and then measuring the volume held.
The Packing Guide images below will give you some idea of what can fit in each size. For example, the smaller 1.7 litre has dimensions that will fit a standard 750ml waterbottle, or you could fit a lightweight packable waterproof, multitool, inner tube, pump and trail snack. The larger 3 litre version has dimensions that will allow a 1 litre Nalgene style bottle to fit or you can fit a standard size gas cannister, stove, cook kit and even some food.
Packing guide
Media Reviews
For those who choose to bikepack on rigs that are completely bereft of bonus eyelets, and the ability to fit a cargo cage of some sort, the Downtube pack is definitely an appealing solution to carrying extra gear. It’s durably made, 100% waterproof, and considerably kinder to your paintwork than Velcro-mounted alternatives.Read the review
Tailfin’s Downtube bags nicely fill a gap in their lineup for folks that are lacking dedicated mounting points. The pack is remarkably stable and well thought out, with materials built to last years on the road.Read the review
Additional Product Imagery
Top tip: Try searching for your bike make/model below to find others using this product on your bike.
Title:
The Tailfin Downtube Bag is a game-changer for cyclists seeking durability and weather resistance in their gear. As an avid cyclist who frequently encounters unpredictable weather conditions and rough terrain, I've put this bag to the test, and it has exceeded my expectations on every front.
First and foremost, its durability is unmatched. Constructed from high-quality materials, including robust fabrics and reinforced stitching, this bag can withstand the rigors of long-distance rides, gravel trails, and adverse weather conditions without showing any signs of wear and tear.
What sets the Tailfin Downtube Bag apart is its exceptional waterproofing. Cyclists often face the challenge of keeping their belongings dry during rainy rides or when crossing wet terrain. With this bag, that concern becomes a thing of the past. Its fully waterproof design, including sealed seams and a reliable closure system, ensures that your gear remains bone-dry, no matter the weather conditions.
In addition to its rugged build and waterproofing, the Tailfin Downtube Bag offers ample storage space. Its well-thought-out design provides enough room for essentials like spare tubes, tools, snacks, and even a compact camera or smartphone. Plus, the bag's streamlined profile and aerodynamic shape minimize drag, allowing for efficient riding performance.
Installation is a breeze, thanks to Tailfin's innovative mounting system, which securely attaches the bag to the downtube of your bike without the need for straps or additional hardware. Once in place, the bag stays put, providing stability and peace of mind throughout your ride.
Overall, the Tailfin Downtube Bag is a must-have accessory for any cyclist seeking a rugged, waterproof storage solution. Its unparalleled durability, waterproofing, ample storage capacity, and easy installation make it an indispensable companion for adventures on two wheels, whether tackling challenging trails or commuting through the urban jungle.
"I also have the Tailfin Top Tube Bag in use and I use it every day on my commute from Bonn to Cologne and back, covering a total of 17,000 km commute. Since discovering the brand, I would definitely consider purchasing additional bags. I am also open to becoming a brand ambassador. I am highly impressed with the build quality."
high quality and function.
Great support if needed.
Highly recommended!
Tailfin simply makes the best bikepacking gear on the market. It’s the most well thought out and simply does what it should: keeps your gear dry and, well, kept.