Simple upgrade for big performance! 💪 This is a very underutilized upgrade for your Shimano drive unit, that will save you tons of cash. Get the absolute most out of your EP801 or EP6 unit, and upgrade to get this top tier technology. Call or come by the shop for more details! #cbcycleworks #shimano #shimanoep801 #autoshift #shiftwhilecoasting #shimanoep6