Shimano FD-CT90-E is a high-performance front derailleur designed for triple front chainwheel systems, offering precise and smooth shifting. It is compatible with chain stay angles of 63° to 66° and 66° to 69°, making it suitable for a wide range of bike frames. The FD-CT90-E features an adjustable stroke to accommodate different chainring sizes and a low-profile design for improved clearance. It also includes an integrated cable guide to ensure smooth and consistent shifting performance.