Shimano GRX RD-RX827 12sp Di2 Rear Derailleur protection High-stretch mesh uppers for breathability

High-stretch mesh uppers for breathability with bonded seams to prevent chafing

Feature Specification Closure System Dual micro-adjustable BOA L6Z dials Upper Material Perforated synthetic leather Fit Technology S-PHYRE with surround wrapping upper Midsole Low stack height

The result of CFD (computational fluid dynamics) testing

without wearing a bulky backpack

Shimano GRX RD-RX827 12sp Di2 Rear Derailleur protection High-stretch mesh uppers for breathabilityEngineered for lightning fast, ultra precise 12 speed electronic shifting, delivering unmatched chain security and performance for demanding gravel and adventure riding. The Shimano GRX RD RX827 12 speed Di2 Rear Derailleur stands as the heart of Shimano's latest electronic gravel groupset, meticulously designed for the rigors of off road exploration. This GRX Di2 derailleur provides instantaneous and incredibly accurate gear changes, ensuring