Shimano Ultegra RD-6700 Rear Derailleur , Silver, Triple, Medium Cage Wide link design for increased stiffness and better shifting accuracy Wide gear-ratio compatibility allows you to use with an 11-28T cassette with a total capacity of 33T 4 Fluoric coated link bushings for smooth and long lasting operation 10 speed compatible Max sprocket: 28T Max front capacity: 22T Total capacity: 39T 189 grams