I realize this post is from 2019 and it is now 9/27/21. I just spoke with Spartan’s parts people. They tell me that they are 2-4 weeks away from completing testing on what sounds like this very same run flat device. He told me there were problems with out of balance issues such as wobble or an egg shape feel in the handling at high speeds as the devices were designed for use by the military with vehicles that don’t go over 30-40 mph. They told me when the device is ready for sale it will be announced on the Spartan apps. He stated this will be cheaper and better than anything currently on the market and that they hope to place it with their authorized dealers who will receive instructions and videos help with the sale and install, as well as at the Spartan facility. FYI
