●Ultegra Shadow design rear derailleur with wide link design gives quick accurate shifts and excellent drivetrain efficiency ●Sleek appearance with Low profile Shadow design construction reduces risk of damage in a crash ●Wide outer link plates increase pivot joint rigidity to reduce shifting deflection ●Lightweight aluminium pulley cage helps reduce weight without sacrificing shifting performance ●Wide gear ratio compatible with 11-25 up to 11-30T, Compact. Flat design.