Di2 PC Linkage Device with System Checker watches The Adjust-A-Rack is made to

The Adjust-A-Rack is made to fit bikes that have rack mounts on the frame (like Fairdales or many other brands)

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Touch screen compatible thumb and index fingertips

MTB-specific disc rotor provides up to 7% more braking power

choice of dampers

Di2 PC Linkage Device with System Checker watches The Adjust-A-Rack is made toThe Shimano PC Linkage Device for STEPS and Di2 groups is used to check system functions, connections, and errors as well as update firmware and customize functions. Improved quality of communication against noise Easy checking function for current leakage