105 CS-R7101 12 Spd. Ultegra Di2 This is a great option

This is a great option for the player who wants the control of a great player's racquet without the weight

including quick release and all sizes of thru-axles

Tech Specs:

handling and strength

micro-adjust your float up to 15 degrees

105 CS-R7101 12 Spd. Ultegra Di2 This is a great optionA 12 speed cassette range that brings versatility to any rider or road From sprinting on the flats to climbing steep inclines, the 11 34T cassette has you covered. It is compatible with both SHIMANO 11 speed and 12 speed FREEHUB bodies. FEATURES: Refined 12 step gear combination provides peak efficiency and accelerating performance for every situationCompatible with new 12 speed and road 11 speed FREEHUB body Product Specifications: MODEL NO CS R7101