Sram's new XX groupset is one of the most exciting developments in years, with two chainrings up front, ten cogs on the rear and a total drivetrain weight of just 613g. You can read about it in the latest issue of mbr (Summer 09), where we've got all the pics and a five-page First Look special. Check out the video of bike test editor Alan Muldoon testing XX in the Tuscany hills, shot by Victor Lucas.