what's going on with the back wheel? it looks, ahem, rad and sick.
It's a Lightweight Disc I believe: http://www.carbonsports.de/index.php?id=29&L=1
@pifko started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
It's a Lightweight Disc I believe:
http://www.carbonsports.de/index.php?id=29&L=1