A mate of mine has sent me the following pictures there development tyres from michelin
They've been testing them for quite a few years
see what you make of them
Resilient Tech was developing them for the military application

and michelins version

These tires are airless and are scheduled to be out on the market very soon. The bad news for law enforcement is that spike strips will not work on these. Just think of the impact on existing technology:
A. no more air valves...
B. no more air compressors at gas stations...
C. no more repair kits...
D. no more flats...
These are actual pictures taken at the South Carolina plant of Michelin.