Our AXEO Comfort cartridges come with an install guide that includes a rider weight/preload chart that will provide a recommended preload setting based on rider weight. The key to setting the preload correctly is to ensure the preload setting is set to the rider weight only, and NOT the rider AND passenger weight. Most of the passenger weight is displaced over the rear shocks, therefore, if you set your preload based on rider and passenger weight, the front suspension will ride much firmer than most would prefer.
We do not have a true zero setting with the AXEO Comfort cartridges. That being the case, to reset your preload to a different setting or to know what weight they are set up for currently, you will want to measure the gap between the preload adjuster and the bottom of the rebound spring perch. Then, once you know that measurement, you can adjust or reference your current setting according to the chart below.