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No Straps, No Top Tube Bosses Required

Now with updated hinged clip - for greater allowance between top tube and headtube angles. Optional to use bungee for extra security. For easier assembly the internal washers and nut have been replaces with a single strip.
Please note that the instructions and some photos do not reflect the changes.

A top tube bag with our A.S.S. Anti Strap System built-in. Whilst designing the standalone Anti Strap System we tried many top tube bags; some where super light, some were tough, some had huge capacity, but none had all the features we wanted in an everyday top tube bag. So we set about designing our own.

  • Slide on/off quick-release - ideal for taking your valuables with you
  • A.S.S. Slider bonds* to the top tube OR screws directly to bosses
  • A.S.S. Clip Includes a special 10mm stem spacer (standard 1/8" steerer, click here for additional spacers to suit Giant, Canyon and Specialized future shock).
  • Extra bike side sliders and clips available for fast swapping between bikes, see here.
  • No interference with stem, no rubbing and high stability
  • External stash pockets - Keep sticky used wrappers separate
  • Internal mesh pocket
  • Internal phone retainer - stops phones rattling around
  • Cable port
  • YKK Aquaguard Zip
  • Extended side skirts 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.

      Examples of module and bracket combinations

      Customer Reviews

      Based on 8 reviews
      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.

      john dowding
      A.S.S top tube bag

      Love this bag . Great size can fit my I phone 8+ in no problem and the strap is great so the phone doesn’t rattle around . The outside pockets are great for gel wrappers . Just throw everything in and when you stop somewhere just pull it off and take it with you . The only thing I didn’t like was the holes in the bag to mount it were not in the right place for my frame and had to drill my own which wasn’t a problem

      Hygge dog
      Slightly fiddly to set up but worth it

      Waterproof, narrow ( bash my knees on other manufacturers versions)
      V easy to click on and off
      Like all of the 76 Projects products that I have tried, this is a well thought out iteration of the bento /tri bag
      I like it