Run flat insert system offered by POLYMET were tested repeatedly in grueling desert track of RAK with rubbles, dry crossings, having a number of obstacles such as natural ramps, steps formed in a wadi, ditches as well as gravel tracks with corrugations and loose sand pits – real hostile desert conditions of temperature ranging from 30 C to 50 C in a Loaded Toyota Hilux, loaded above its GVW gross weight of the vehicle.