Shimano GRX RD-RX825 12-Speed Derailleur 2023 A reinforced TPU inner panel

A reinforced TPU inner panel creates added protection from your crank arms while keeping a comfortable fit for all-day wear

Mongoose Bikes

but is designed to play nice with front shifters

inner bushing and outer cartridge bearing

The do-everything tight: great in dry conditions

Shimano GRX RD-RX825 12-Speed Derailleur 2023 A reinforced TPU inner panelWhere The Magic Happens The Shimano RX825 Rear Derailleur features Shimano's pioneering Shadow RD+ technology. With its convenient on off switch, Shadow RD+ makes removing the rear wheel easy when turned off. When on, the drivetrain is under additional tension that makes for a quieter ride and more precise shifting. Like on Shimano's road 12 speed Di2 systems, the rear derailleur is also the communication hub of the drivetrain, communicating