Whether you’re traversing rolling hills of the Peak District, exploring the Lake District mountains, or bouncing from bothy to bothy in the Scottish Highlands… the adventurous and ever-dependable Koala is a trustworthy companion.

Koala attaches beneath your saddle to provide you with secure and light storage with an impressive capacity.

..Read more

Koala is at its most stable when attached to the Exo-Rail, which reduces sway and increases stability. Attachment is quick, simple and secure with a slide-on, slide-off sleeve and stabilising saddle rail strap. If you don’t have an Exo-Rail, you can partner up the saddle rail strap with velcro straps and the handy webbing ladder to attach it without.

Roll-top closure and compression straps keep your cargo compact and portable and ensure stability when the bag is less full.

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

Read less

Key Features

  • Spacious and secure under-seat storage for endurance racing, exo-rail compatible
  • Made with waterproof and highly abrasion-resistant fabrics
  • Roll-top closure and compression straps for stability
  • Stripped back design to max weight savings
  • Made in UK at AKHQ
  • 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.


Tarmac Koala 7 Tarmac Koala 13
Capacity 7 l 13 l
Dimensions 37 x 17 x 13 cm 41 x 21 x 17 cm
Weight 180 g 215 g


Buckles: 20 mm SJ with Camlok, 25 mm Xlite with Camlok Stitched Seams Roll-top closure

Fitting Guidelines

Koala attaches to the Exo-Rail with a slide-on, slide-off sleeve and saddle rail strap. You can attach Koala directly to you saddle without the Exo-Rail using the handy webbing ladder and velcro strap, but it will not be dropper seat post compatible without the Exo-Rail. Minimum clearance from saddle rail to wheel: 18 cm

Care & Environmental Advice

Product Care Information

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


The Details

Koala Ultralight Ltd Edition in action