Shimano Shimano Tiagra RD-4700-GS 10-Speed Medium Cage Rear Derailleur OSPW plus a supportive footbed with

plus a supportive footbed with Aegis® anti-microbial treatment for optimal comfort and fit

EXT combines Vittoria's peerless knowledge of racing performance with the durability of a long-lasting nylon casing that uses a unique Silica and Graphene compound for improved rolling efficiency

allowing single-button control of the front derailleur for maximum customization

wear resistance and suppleness for top performance in the intended conditions

One Way Bleeding technology allows for easy maintenance

Shimano Shimano Tiagra RD-4700-GS 10-Speed Medium Cage Rear Derailleur OSPW plus a supportive footbed withONLY WORKS WITH ST 4700 and ST 4703 Shifters.