Vision Metron TT 2x Crankset 53/39T 165mm 130BCD 386EVO N11. The Vision Metron TT 2x Crankset is built for aerodynamic efficiency and power transfer in time trial and triathlon applications. Featuring a carbon construction and optimized chainring interface it delivers stiffness and responsiveness under load. This crankset is designed to integrate seamlessly with aero frames and drivetrains helping riders maintain consistent cadence and speed during solo efforts.