Micro SHIFT Advent Front 9 Speed Double Derailleur Micro SHIFT components are known for delivering bombproof and precise shifting mile after mile. It's clear that their reputation stays true for the Advent front derailleur. It offers smooth and predictable 2x9-speed shifting all day long. Support for 34. 9mm seat tubes and 31. 8mm seat tubes with an adapter ensures excellent compatibility. Simply put, the Advent front derailleur delivers an excellent and affordable option for riders using a 2x9-speed Shimano mountain drivetrain. Features Crisp and reliable shifting all day long Stiff mounting hardware improves shifting quality Sensible cable routing makes the setup easier Drivetrain speed: 9Chainring support: 2x Band clamp: 34. 9 (31. 8mm with an adapter)/b>Cable design: Dual Pull Capacity: 16t Top gear teeth: 44-48t Compatible: Shimano Mountain Weight: 149g | Microshift | Advent Front 9 Speed Double Derailleur 9-Speed Double 44-48T Max 31. 8/34. 9Mm