Let me try to clarify the confusion, Euro. Ian was talking about Tyron bands able to, quote, "allow the vehicle to continue out of harm's way", if the tyre was penetrated by a bullet, i.e. after a blowout. This suggests some sort of run-flat property that Tyron bands definitely do not have.
The claims made by Tyron are that the bands prevent the tyre from coming off the rim and that this, in turn, reduces the risk of the outfit from getting out of control. However, if a blowout occurs at motorway speeds, the tyre will be torn to shreads by the time you come to a stop and only the innermost bead of the tyre will remain on the rim by then anyway, whether with or without Tyron bands. Tyron bands can do nothing to prevent the loss of the tyre tread and sidewalls. The little that does remain (whether this is due to a restraining effect of Tyron bands or not) will provide next to no rubber contact with the road surface and you will probably even find that the wheel is already running on the rim before you stop. Consequently, there is nothing left of the blown tyre to provide any additional stability. So what is there left for Tyron bands to do? At best they can prevent the remaining bead from coming off the rim, but as the bead on its own is of no help, I do not see the point of Tyron bands. Besides, my experience is that even without them, the bead will stay on the rim. I had a blowout immediately before a motorway exit and was able to slow down from about 60mph and negotiate the exit safely even with the wheel running on the rim by then.
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