*Take off from a customer's bike, parts are brand new.*
The RD-RX820 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. The SHIMANO GRX 12-speed rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. And the chain tensioner has an ON/OFF switch for outings on smooth surfaces.
BENEFIT
Silent and secure rear shifting on rough terrain
FEATURE
Adjustable chain stabilizer prevents chain slap and drops
FEATURE
SHIMANO SHADOW RD+
BENEFIT
Smooth and reliable shifting on mixed surfaces
FEATURE
ON/OFF stabilizer switch matches terrain
BENEFIT
Maximum front chainring difference: 17T
BENEFIT
Top sprocket: Max. 11T/Min. 11T
BENEFIT
Low sprocket: Max. 36T/Min. 34T
BENEFIT
Total capacity: 42T