The SLX RD-M670 SGS features Shimano's low profile Shadow design with direct cable routing and has Dyna-Sys 10-speed specific cable-pull compatibility. The SGS model is the long cage version which allows for a 43 tooth total capacity.
A strong actuation spring is designed to avoid chainstay and obstacle contact. The wide link parallelogram design increases rigidity and performance. The RD-M670 also has a Top-Normal return spring optimized for Shimano RapidFire shifters.
Two fluoric coated link pivot bushings minimize friction
Aluminum and steel construction with 11-tooth pulleys
Direct mount frame compatible allowing easier removal of rear wheel