The Shimano 105 RD-R7100 12-Speed Rear Derailleur delivers smooth, stable, and efficient shifting performance with the proven SHIMANO SHADOW RD design. Engineered for modern 12-speed drivetrains, it accommodates a wider gear range with a maximum low sprocket capacity of 36T, making it ideal for tackling steep climbs and varied terrain. Its low-profile construction enhances chain stability and reduces the risk of damage in rough conditions, while maintaining the precise, reliable shifting that defines Shimano drivetrains. Compatible with HG 12-speed chains, the RD-R7100 supports both conventional and direct mount attachment, ensuring versatile integration across road bike setups. Combining advanced engineering with the trusted reliability of the 105 series, this derailleur is built to provide consistent performance for endurance riders, racers, and enthusiasts alike