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This product has been archived and is no longer available for purchase.

Stem Cell Ultralight Ltd Edition stem-mounted bikepacking bag

Tarmac Stem Cell UL


  • Grey - Tarmac Stem Cell UL

Stem Cell Ultralight Ltd Edition stem-mounted bikepacking bag

1.8 litre ultra lightweight stem-mounted bags, ideal for keeping your gels, a water bottle, camera, Mytimug, or other riding equipment close-to-hand on your two-wheeled adventures; UK-made to last

This product has been archived and is no longer available for purchase.

  • Full Description
  • Features At A Glance
  • Care & Environmental Advice
  • Customer Reviews

Refuelling with an energy gel, taking a swig of water, capturing a sunset on camera… Some things just can’t wait until you hunker down for the night. 

Stem Cell attaches to your bikes' stem to provide easy-to-access, storage space for the stuff that you’ll need frequently during your ride. Placed well within reach when you're riding, it works well as a stand-alone bag for day riding or as a part of your cockpit setup on longer bikepacking adventures. 

Constructed from waterproof and abrasion resistant fabrics with a minimalist design in our UK factory, Stem Cell is made to endure the demands of life on the road without compromising on weight. 

A webbing ladder offers endless attachment points around the flight deck; simply cut the VELCRO® strap provided to size. 

Drawcord closure creates a 7 cm extension tube to fit a 600 ml bottle or 750 ml Nalgene; the Stem Cell also fits a Mytimug 650. 

"Is it waterproof?" 

Although highly weather resistant, this product is not fully waterproof due to its stitched construction and drawcord closure. If you are carrying valuables or electronic equipment, make sure to put it in a dry bag.  

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Key features
  • 1.8 litres of stem-mounted storage that you can access as you ride
  • Made to last at AKHQ
  • Made with waterproof and highly abrasion-resistant fabrics
  • Elasticated drawcord closure creates extension tube for maximum capacity
  • 25 Year Alpine Bond
Vital stats
LS07 (Tarmac Ultra Light)

The lightest waterproof and abrasion resistant fabric we use, ideal for your ultralight long-distance racing or bikepacking set-up. A 70 denier Nylon Ripstop backer makes it super tough for its weight.
We make LS07 products without a lining to keep them ultralight. 
Weight: 40 g


Capacity: 1.8 litres
Diameter (top)*: 11 cm (bag tapers in at the bottom)
Height (back): 21 cm + 7 cm extension tube; (front): 15 cm + 7 m extension tube
Velcro strap(WxL): 2.5 x 75 cm


Drawcord closure
Stitched Seams

Fitting Guidelines

Stem Cell has a handy webbing ladder for attachment, you can secure it to your stem using the velcro straps provided.

Origin: United Kingdom

Product Care Information

​Stem Cell has a DWR coating which helps it to repel water and dirt. After your two-wheeled epic, wipe down your Stem Cell with a damp cloth to remove dirt.

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