Shimano Ultegra R8000 SS Rear Derailleur is made with wide link design, giveing quick accurate shifts and excellent drivetrain efficiency. More equal shifting effort throughout the full range of the cassette. Maintains precise shifting over an extended time period. Wide link design increase rigidity and reduces shifting deflection. Wide outer link plates increase pivot joint rigidity to reduce shifting deflection. Lightweight aluminium pulley cage helps reduce weight without sacrificing shifting performance.
KEY FEATURES:
- Sleek integrated appearance
- New low-profile design
- SHIMANO 쉐도우RD
- Race endurance
- Optimized slant angle
- Wide compatibility
- RD-SS covers: 11-25T to 11-30T
- RD-GS covers: 11-28T to 11-34T
Various derailleur systems were designed and built as far back as the late 1800s. A French bicycle tourist, writer and cycling promoter Paul De Vivie (1853-1930), invented a two speed rear derailleur in 1905 which he used on forays into the Alps, and we wonder if 20 gears are enough. Since then there has been many advancements in the number of gears, materials and reductions in weight.