Shimano 105 RD-7100 12sp Rear DerailleurThis 12 speed rear derailleur is engineered for modern drivetrains, offering a high capacity design that ensures smooth and reliable shifting across a wide range of gears. Its conventional direct attachment mount provides a stable foundation for consistent performance on various road or gravel setups. Gearing Versatility: Features a 41T total capacity and is optimized for cassettes with a 34T to 36T low sprocket, accommodating a maximum front