This new invention made by Bridgestone, features tires that never go flat. The tires have thermoplastic resin spokes which help absorb the weight of the rider and road shocks. This is extremely efficient because there will be no need to get new tires.
Original Article:
http://esfstream.com/airless-bike/
This relates to engineering because the engineers had to think of creative ways to make riding bikes more efficient.
Here is a video which explains the tires:
