Dk professional v2 expert 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 this frame also features a trapezoidal shaped seat tube for increased stiffness features materialspf formed 7005 aluminium tubing headtube1 18 4545 integrated headset wheel size 20 drop outs20mm with tensioner blocks for 38 20mm included head tube angle73 seat tube angle69