GRX RD-RX820 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Plus Design 36t Max Low

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Product details

Management number	202930423	Release Date	2025/09/27	List Price	$72.50	Model Number	202930423
Category	PARTS Shifters & Derailleurs Derailleurs

Shimano GRX RD-RX820 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Plus Design 36t Max Low. The Shimano RD-RX820 rear derailleur is compatible with 11-34t and 11-36t 12-speed cassettes providing a wide gear range so you can spin a comfortable cadence no matter the terrain type. This rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. The chain tensioner has an ON/OFF switch for outings on smooth surfaces.

Silent and secure rear shifting on rough terrain

Adjustable chain stabilizer prevents chain slap and drops

Shimano Shadow RD+ offers less distraction a quiet drive train reduced chain slap and a solution for chain drop

ON/OFF stabilizer switch matches terrain for smooth and reliable shifting on mixed surfaces

Compatible with HG 12-Speed Chains

TECH SPECS

Largest Cog	36
Rear Der/Shifter Compatibility	Shimano Road
Rear Derailleur Mount Type	Shimano Rear Direct Mount
Rear Derailleur Mount Type	10x1 Standard
Drivetrain Speeds	12
Weight	270
Chain Wrap Capacity (teeth)	42