SHIMANO Ultegra Di2 R8170 2x12 Complete Groupset recovery Simple upgrade path to dual-sided

Simple upgrade path to dual-sided via RS-UP

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the removable front vent cover transforms the helmet into a fully streamlined speed machine

This enabled high-precision and efficient testing of over 50 fabric types in 135 different configurations

combined with innovative tech features

SHIMANO Ultegra Di2 R8170 2x12 Complete Groupset recovery Simple upgrade path to dual-sidedShimano Ultegra Di2 R8170, 2x12 Speed Electronic Groupset Shimano Ultegra R8170 represents the Science of Speed, engineered to deliver a faster, more precise, and more intuitive ride. Every detail has been optimized to elevate the road cycling experience, reconnecting riders with the essence of performance, rhythm, and freedom. Hybrid Semi Wireless Di2 Platform Wireless shifters for a clean cockpit Wired derailleurs and central battery for maximum