A.S.S. Top Tube Bag

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No Straps, No Top Tube Bosses Required

A top tube bag with our A.S.S. Anti Strap System built-in.

  • Built-In A.S.S. Slider
  • Bonds* to the top tube OR screws directly to bosses
  • Slide on/off quick-release - ideal for taking your valuables with youBuilt-in A.S.S. ClipIncludes a special 10mm stem spacer
  • No interference with stem
  • High stability
  • No rubbing
  • Quick-release
  • External stash pockets - Keep sticky used wrappers separate
  • Internal mesh pocket
  • Internal phone retainer - stops phones rattling around
  • Cable port
  • YKK Aquaguard Zip
  • ‘Modesty Skirt’ - extended sides conceal the A.S.S. Slider mechanism
  • Waterproof, welded 600D fabric with TPU backing a DWR treatment.
  • 50mm wide x 110mm tall x 220mm long (approximately 1L)

Already have a Top Tube Bag but like the sound of the Anti Strap System? See our A.S.S. Slider and Clip for existing bags.



The bag works very well and the claimed waterproofness is effective. you could keep valuables in there and slip it easily off and on if leaving the bike out of sight. Floppy bag syndrome is a thing of the past with the A.S.S. system too
As the final part of the 76 Projects A.S.S. system, it's well-executed and well-priced. The ability to do entirely away with paint-damaging straps and get a more stable bag that can be easily removed is a winner. The fact that they have made it look and function this well is a bonus.
Being able to slide your loaded top tube bag on and off in a few seconds is brilliant for convenience and security. There’s no worry about bag flop, wobble or paint scratching either.

Customer Reviews

Based on 10 reviews
Great idea, terrible implementation.

What a great idea, but terrible implementation. An hour of fiddling with cutting holes and trying to find additional hardware which you don't provide (countersunk M5 bolts for on to the bike, to clear the sliding mount). No instructions provided. I will make it work, but only out of annoyance. The average cyclist will not be able to install this. I would not recommend it.

The Dordogne Cyclist
So far very good.

I got the bag two days ago.
Instructions to fit it are easy enough to follow and fitting was fine although the stem mount was a bit of a fiddle as my hands are too big. They should supply a small child in the package to make this easier.
Function is great. Its narrow and so not in the way when peddling. I get a slight rub from the bag on my inside leg when I am out of the saddle but its not a big issue.
I love the fact that I can stuff my Gore shakedry into it and still have room. It is also good that I can get the phone in there too. Its very stable when riding and of course it has no straps.
I intend to get another mount to stick onto my Ti Gravel bike so its one bag for two bikes.
I big plus would be a choice of colours.

The grey is fine but a colour choice would be awesome.

Peter Stearns

the contact to the steering tube is genius. very stable. would like to see a larger capacity version as well

Jeff Golden
Very good system.

Would be 5 stars if owners of multiple bicycles could add on extra spacers and adhesive mounts at the time of initial purchase for as many bikes that the bag may be used on.

Hi Jeff. We now have spare bike side sliders, spacers and pads in the spares section.

mark bonsey
Brilliant Bag

Fantastic top tube bag. Instructions are easy to follow and the bag itself are easy to assemble the parts needed for fitment. Storage space is very generous with the bag being to store my iPhone pro max, multi tool and nutrition for longer rides. Very sturdy when mounted and clipped in place this is the best top tube bag I’ve bought.