Spotted this bike in front of the (newly opened) Cafe Regular Du Nord - with super bright and playful stripes on the tire's side walls.
... turns out that a few years back Grant Petersen, at Rivendell, came up with the idea to combine colors/pattern to create a visual effect once a bike tire was spun. In motion, the tire wall "blends" color (speed-blend) and creates a beautiful and magical effect.
Just imagine all the amazing colour combinations you could achieve using this idea. Unfortunately, I believe they are discontinued.