Remember this? Ron Arad’s spring steel wheel bike might have been cool to look at and was built for a good cause, but did it leave you wondering if the bike would actually ride properly? Well now you can check it out in action in the video after the jump.

While sales are not a regular feature on this site, it is worth noting that the Ripple Chair, designed by Ron Arad, is available now for a rather nice price at the SFMOMA Museum Shop. Arad’s injection-molded thermoplastic seat holds a relief design reminiscent of traces left by waves in the sand. As such, the chair successfully melds the designer’s notions of sculpture and practicality in a sturdy chair. A collection of four is also easily stacked, making it design that is also easy to store.