Introducing Mag-Lock
Self locating, secure and dependable. The Mag-Lock takes the guesswork out of flip top closures with ‘no-second-guess’ feedback even when using winter gloves
Banish knee rub
Body mapped shaping reduces the likelihood of knee rub by tapering the design in the right areas
Instability eliminated
Revolutionary V-Mount technology and dedicated internal shell eliminate unwanted movement from just two mounting points
Multiplie mounting points in one
All Tailfin Top Tube packs are both strap and direct mount compatible allowing you to fit as you choose to multiple bikes
Top tip: Try searching for your bike make/model below to find others using this product on your bike.
Top Tube Bag Flip - 1.5l
For the past two years I’ve been using the large top tube bag for all my endurance and everyday training. The bag is attached with the provided straps and is stable over the 315 km events I’ve undertaken and it easily fits all my nutrition needs for such an event. I have actively endorsed Tailfin bags to my cycling community due to its quality, ease of use and fantastic support from the team in Bristol.
my 1.1L Tailfin Toptube bag is proven to be better than others from respectable brands. At almost the same price, this is a no-brainer.
This was my first on frame storage. I was looking for a bag that is secured well, kept my phone and items safe and also was easy to access. Tailfin’s bag meets the bill. What u love about the bag is how it integrates with bike and makes it look like it’s is part of the bike from factory.
If you are looking for an on frame bike look no further. Build quality, ease of install, and access make this a go to option for on bike storage.
Use the specifications above or print our template and cut to size
Yes, the V-Mounts can accommodate any standard 20mm width cargo style strap. However be aware that many cargo straps use a longer prong that could catch skin or clothing.
Absolutely. Even when pulled very tight the natural stretch of our Cargo Strap system exerts minimal force to the frame.
You should base your choice on which bike you are mainly going to use and also how much storage you would typically need. Our 1.1 Litre Top Tube Packs are designed to fit almost any style of bike so would be our recommendation to be used on multiple bikes.
Our Zip Top Tube Packs offer the narrowest profiles so are perfect for riders who typically suffer from knee rub from top tube packs. They also offer the most secure storage to carry valuables on rough surfaces. Our Flip Top packs allow for rapid access and great visibility of contents, perfect if you want constant access to food, phone or camera whilst on the move. Flip Tops also offer slightly better weather resistance if riding in constant storm conditions.
No! When attached correctly the soft rubber of the V-Mount grips the frame so well that there is zero likelihood of movement.
We were at pains to ensure that all sizes of Top Tube Pack can accommodate a standard iPhone or Android equivalent, even the smallest 0.8 Litre pack. If you have a larger (Plus) style phone you will need to look at the 1.1 Litre or 1.5 Litre Top Tube Packs.
Within reason you can carry any weight in a Top Tube Pack. The limit would be volume.
Although the packs have been shaped to fit perfectly on the top tube the V-Mount system will allow you to fit a Top Tube Pack anywhere (except forks). We would recommend this only for Zip opening packs as a Flip Top opening would not be as secure in a vertical orientation.
The straps supplied with the Top Tube Packs are low profile so shouldn’t interfere with standard frame pump fittings.
As with all Tailfin soft goods we recommend that they be washed with warm soapy water if you want to clean them (although we like a good dirt patina!)See our cleaning guide here.
No, the rubber V-Mount covers are pre-cut to allow screws to pass through neatly.
Specification


The Fundamentals | ||
---|---|---|
Size
1.1L |
Size
1.5L |
|
Riding Style
Road / Gravel |
Riding Style
MTB |
|
Weight
154g* |
Weight
187g* |
*Direct Mount. Add 12g when Strap Mounted
Looking for even more detail? Read the full deep dive and discover what went into over 2 years of product development…
Media Reviews
“From a technical perspective, a few things make the Tailfin Top Tube Packs unique”
“Tailfin offers up a super-refined take on a classic bag that fixes many of the issues present in the existing options”
“All in all, another very well executed – and cleverly engineered – addition to the Tailfin range”
“Tailfin’s first foray into top tube bags has been a resounding success”
“Buy this pack if you want the best, most stable top tube pack currently available”