Downtube Packs

From: £60.00

The Downtube Pack is our solution for adding extra storage to a frame without traditional cargo mounting points thanks to patented V-Mount hardware that create a truly solid, reliable, and repeatable connection between bike and pack.

Downtube Packs allow you to utilise free space for carrying the essentials whether on a mountain bike trail ride, bikepacking adventure, or road tour. Available in two sizes, 1.7 litre, and 3 litre. Optimised to maximise space regardless of frame geometry.

Each pack ships with 2x Tailfin V-Mount Straps, designed to work with your frame.

 

Specification

1.7 v-mount spec
3l v-mount pack
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

Additional Product Imagery

 
 

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

Customer Reviews

Based on 107 reviews
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(95)
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I
Ian Duckworth (AU)
Bike: Trek Roscoe 7
Riding Style: Bikepacking
Worked Great on 1000km Munda Biddi Trail

I was very happy with the functionality the downtube pack provided on my recent ride of the 1000km Munda Biddi Offroad Trail in Western Australia. I used it to store my spares and tools. The pack stayed in place over all the punishing bumps, was waterproof and provided convenient storage. Really happy with it.

K
Kurihara Hirokazu

Downtube Pack

N
Nick Comley (GB)
Bike: Specialized Diverge Carbon Base with loads of upgrades
Riding Style: Bikepacking, Touring
A1 products, double-A1 customer service.

I have a very early version of the carbon rear rack, two 22l panniers and the front fork bags. The products are simple to use, robust, secure and don’t rattle about like the cheaper panniers I have on my “shopping” bike. I particularly like the fact that Tailfin offer a comprehensive set of spare parts which mean if something fails (I trod on an empty pannier and broke the plastic stay) you can just buy a replacement without having to write off the whole thing. On top of the products their customer service is exemplary. Swift, courteous and helpful responses to all my enquiries and a no quibble returns process (I bought a downtube bag that didn’t fit) make them a joy to deal with. Would recommend to others, will defo buy again.