The days of flat tires and spares are numbered. Sure, self-inflating tires are all well and good, but don't protect from the darn puncture itself. Fortunately, Bridgestone has been demonstrating its new air-free concept tires that use a uses a tough but flexible thermoplastic structure that behaves like a normal tire with nary any horizontal force produced. Each wheel is able to support around 150kg, although on a typical electric mobility scooter the load is more likely to approach 50kg. Bridgestone is looking to sho