(ECNS) -- A military and civilian technology innovation and application exhibition was held in Changsha, Hunan Province on Nov. 27.?
A tire pierced with long spikes attracted onlookers. The hollow tire is bulletproof, flame-retardant and air-free.?
It was made using 3D printing techniques and composite materials, which enables it to be inflatable-free, flat tire-free and bulletproof. There is no need for repairs even with punctures.?
Its price is similar to that of ordinary tires on the market.
