The Shimano Tourney TY500 Front Derailleur is a great value front derailleur that delivers accurate and low-friction shifting for Multi-fit, Dual pull and top swing. Shimano Tourney TY500 Front Derailleur Features With the use of included adapters, the derailleur can be mounted to any size seat tube Compatible with 6/7-speed drivetrains Top swing dual pull design is light action and compatible with either top or bottom pull frames For use on MTB style bikes with 66 to 69 degree seat tube to chainstay angle Developed to work with 42 tooth outer chainring