It’s a very strange thing to sit on a chair, in one motionless spot, all day long. After a series of hours, the body desires to ambulate, to move, to bolt across a room haphazardly. The Zerocaster Office Chair Racing Wheels ($26) help to do just that, satisfying that absurd moment in human nature when the office chair needs to become a runaway train. The hubless design of the ZC070 promotes a smoother, stronger, and quieter type of roll on any carpet, wood, or if you’re feeling really crazy, jagged concrete surface. The dangers of a sedentary lifestyle no longer just include diabetes.