Answer rove dirt jump stem answer dj stem is as strong as it is simple it is made of 7075 series alloy for maximum strength and features a wide faceplate for stiffness and evenly distributed clamp force two lengths allow you to perfectly dial in your reach answer rove dirt jump stem features increased clamp stiffness extremely high strength material for dirt jump applications stainless stem bolt and stainless nut hydro and brake line clean routing and bar spin length options 35mm 50mm