A two-piece hollow design allows for the removal of any unwanted material increasing stiffness and reducing weight Tested to the same standards as our MTB cranks for confidence on or off road Featuring a selfextracting axle-to-arm interface, simplifying fitting and removal Fully CNC machined 7050 Aluminum for precise material removal Unique expanding spline/arm interface Versatile Spline mount for chainring/spider 30mm oversized axle Weight: 518g (172.5mm and 5 bolt spider, w/o BB)