We do not recommend adjusting the Mantis suspension as you run the risk of loosening it to the point that the suspension bolt comes out or strips. Ideally you use the below to tighten the suspension if it feels too loose. If it feels too tight, contact us first for our assessment before loosening the bolt.
For reference, we are sharing the following video that gives a good introduction into the suspension set up.
Note that Ralph made a mistake in the video. To tighten the suspension, you need to turn the bolt CLOCKWISE.