Shimano Deore RD-M6000-GS 10-speed Rear Derailleur Medium CageThe Shimano Deore RD-M6000-GS 10-speed Rear Derailleur is designed for aggressive trail riding and uses SHIMANO SHADOW RD PLUS technology for improved chain stability and retention. This model is for 2x10 setups. The Shadow RD+ chain stabilizer system minimalizes chain slap. The Utilizes Shadow RD Plus offers a quieter drivetrain and reduces chain slap. The Shadow RD Plus provides a simple solution for chain drop and is lighter and efficient that roller type chain devices. The Optislick cable for a light shifting effort and smooth shifting. This is the medium cage version. This is meant for a 10 Speed system with a minimum sprocket of 11 teeth and a maximum sprocket of 42 teeth with a double crank setup. The front difference is 10T and the total capacity is 41T. Available in Black.689228413245