Developed with feedback from several pro cycling champions & triathletes, these J-Bend extensions feature a full carbon construction for the best balance of stiffness & low weight. Offering a proven advantage in weight, aerodynamics & ergonomics, these are compatible with the Vision Metron TFA aerobar, Tri Max Carbon Si-013 & Tri Max Clip-ons. Lightness These carbon extensions, weighing less than 100 grams each, provide a proven advantage in weight, aerodynamics & ergonomics. Aero-Ergo Design Ergonomic & aerodynamic design for the highest performance. Strength to Weight Ratio Full carbon construction for a great strength-to-weight ratio. Manufacturer's Part Number: 670-0335000030 J-Bend