Cybex VR1: Bi/Tri - VR1 Duals Biceps/Triceps. The VR1 Biceps/Triceps is extraordinary in its simplicity. While the patterns are familiar to anyone who strength trains, it is the small details that make the difference. Like the 2:1 reduction, the cambered curl bar that allows for a varitey of grip positions, or the back pad that provides for intuitive positioning and stabilization when performaing arm extensions. Details add up to a better machine.