Hi Beowulf, That air suspension looks like a bespoke design. Would be interested in getting some reviews back from customers on how they like it for both on-road and off-road purposes. I know air suspension goes against the ethos of the Grenadier, however if the system was robust it might deliver a superior on-road experience and perhaps maybe off-road too. Be interesting to see how this plays out. Looks like the company has lots of experience with air suspension. DaBull