ULTEGRA DI2, FULLY CARBON, STUNNING DETAILS. Since 1989, Polygon has proven to provide exceptional bikes at a fraction of the cost in relation to its competitors; the Helios A8X is no exception. The A8X boasts the best road groupset on the market - Ultegra 12-speed Di2 R8100, which has 10% more pad clearance (reduces disc brake rub) and Hyperglide+ (seamless shifting under load). In addition to this, you get 50mm carbon wheels, lightweight UCI approved carbon frame, integrated bar/stem/gps mount, and a stunning matte black frame. With the A8X, you get the complete package, without the price tag. Ride more for less.