Lightweight front Top swing ATB derailleur for smooth gear changes Dual Pull design for use with top or bottom cable routing The regular Multi-fit band clamp assures easy & secure fit on any frame type&44; with adapters to suit seat tube sizes 34.9&44; 31.8 & 28.6 mm Reinforced light weight chain guide adds rigidity & enhanced response Wider pivot link increases torsional rigidity Easy access angled adjustment screws & clamp bolt Angled inner chain guide tail for increased tyre clearance Designed with Mega 9 compatibility for narrow 9-speed chains 44 to 48 tooth outer ring compatible Weight: 152 grams for top swing