Dk professional v2 xl bmx framethe much anticipated professional v2 frame from dk features spf formed 7005 aluminium tubing that is 10 lighter than the hydro formed tubing that most brands use for increased stiffness this frame also features a trapezoidal shaped seat tube and tapered headset features materialspf formed 7005 aluminium tubing headtube1 18 to 15 tapered 4545 integrated headset wheel size 20 drop outs20mm with tensioner blocks for 38 20mm included head tube