Great value Alivio 9-speed mountain bike Rapidfire lever for crisp gear shifting,Mega9 compatible - for use with precision 9-speed drivetrain,Pod design allows the use of this shifter with any brake lever,Low-friction design means that shifters have a light and responsive short-stroke action that reduces shifting effort,Easy to read optical gear display,Barrel adjuster for fine gear tuning,Complete with inner OPTISLICK cable and SP41 outer cables,Easy access clamp band adjustment for quick set up.