Ortlieb Fork-Pack

Overview

And here is what Ortlieb has to say:

Weighing just 290 grams (including adapter), the fork pack offers approximately 4,1 liters of additional storage space for bike packing. With the help of the QLS adapter, this ultra-light bag with roll closure can be mounted on forks with eyelets or cage mounts intended for this purpose, as well as on forks without cage mounts, as long as the fork blades sport a constant diameter of 30 mm to 42 mm.

Fast, faster, Fork-Pack with Quick-Lock S adapter system. The all-new and innovative adapter system is ideal for attaching bags like the waterproof Fork-Pack to the fork of your bike. Weighing just 290 grams (including adapter), the fork pack offers different size options: approximately 4.1 and 5.8 liters of additional storage space for bike packing. With the help of the QLS adapter, this ultra-light bag with roll closure can be mounted on forks with eyelets or cage mounts intended for this purpose, as well as on forks without cage mounts, as long as the fork blades sport a constant diameter of 30 mm to 42 mm. QLS bags are primarily designed for attachment to the fork but can be attached to all vertical tubes using the accessories supplied.

Attention: The QLS adapter is not suitable for direct mounting without eyelets to carbon forks, tapered fork blades, or bicycle frame tubes.

Also Note: The fork pack can be mounted to forks with only 2 as opposed to 3 mounting eyelets.