You might have come across Quamen bikes before if you rode flatland but now they are venturing into the street/park market with their new A-10 frame. The frames are already in production and for sale. Right now the A-10 has a 20.5 top tube but some different sizes are in the works for 2008. Along with different top tube lengths the new 08 is said to weigh in at around just over 4 and a half pounds. Here are some more specs: