Technical details of rotating rollerblade (in-line skating) wheels (see picture).
Right Wheel #1 with Left Wheel #3
Right Wheel #2 with Left Wheel #4
Right Wheel #3 with Left Wheel #1
Right Wheel #4 with Left Wheel #2
NB. Rotating your rollerblade wheels makes a greasy, dirty mess… so if you’ve just got a manicure and bought a nice new pair of white Capris, I’d steer away from taking your blades apart on your white living room carpet.
Here’s a picture from my latest adventures in rollerblading: The Granville Street Bridge looking down at Granville Island.