The bike parts flea market called the particle accelerator has been around since at least 1999, perhaps even longer. And every year it is a fascinating spectacle to see how many bike parts change hands in just a few hours. To stick with physics: The trading, bartering, haggling and comparing at the densely packed stands is reminiscent of Brownian molecular motion.

Behind the stands are private individuals and stores, both wanting to get rid of their stuff and yet some go home with more material than they brought with them.

The insiders know: If they want to find what they're looking for, they have to be ready when the door opens. The first one or two hours are the busiest, after that the most sought-after items are gone. After that, there are all the more bargains. The law of supply and demand applies to everything from quick-release skewers to protector vests and from carbon cockpits to steel forks.

The event organizers of the Pizzacup and the co-organizer Züritrails point out that stand space is still available to rent. For the public, the Pizzacup starts on April 6 at 1 pm in the Zitrone Mangel, Zurich-Leimbach. It ends at 5 p.m. and the leftovers have to go back into the cellar. See you next year.

Further information and stand reservation