Shimano 105 sports Dura Ace-level technology in an affordable package--you get high performance like you've never experienced under all kinds of conditions. Differentiating from the regular 105, the 105 RD-5700SS Rear Derailleur has a larger chain wrap capacity optimized for compact/standard cranks and a wider link design for incredibly smooth shifting. With greater gear selection and improved shifting performance under heavy loads, this is the derailleur for the cyclist who loves to both climb and sprint.
10-speed SIS wide link design for increased rigidity and reliable long-term quality
Compatible with wide gear ratios (11-28T)
Stiffer, wide outer link design suppresses flex to give you sharp, precise shifts that are faster, smoother and stable