A California-based company has a new kind of wheel for skateboards that delivers a novel shape and claims a special ride experience. This is the Shark Wheel, not circular, not square, but something more interesting. The wheels appear as square when in motion from a side view but the wheel geometry is more than that. The wheels feel circular to the rider, and viewing them along with more details may help to clear the mystique. The wheels are made of three strips each; these create a helical shape when they roll, and they form a sine wave pattern. When the wheels make contact with the ground, good things happen, say the team behind the wheels - the user gets speed, better grip, and a smoother ride.
(Score: 2) by mhajicek on Friday May 23 2014, @07:06PM
From a straight-on side view they're just round. They may flex a bit acting as shock absorbers, but that's about the only possible difference.
The spacelike surfaces of time foliations can have a cusp at the surface of discontinuity. - P. Hajicek