Imagination is the only limitation to how much the microSHIFT thumbies can do. Their small minimalistic designs are packed with precision machined mechanism that allows you to shift accurately with either index or friction mode. Go on any adventure without worries for mechanical issues. Features: Include shift cables Indexed or friction mode convertible rear shifter Indexed mode is compatible with Shimano 10-speed mountain systems Specs: Shifter Style Thumb Color Black Drivetrain Speeds 10 Rear Der/Shifter Compatibility Shimano DynaSys