Shimano 105 Rear Derailleur This Shimano rear derailleur is perfect for both novice and experienced cyclists. The Wide Link design ensures greater stiffness and more efficient shifting. In addition, the 11-tooth derailleur wheels ensure less noise and a longer lifespan. The derailleur has the same look as the latest Ultegra and Dura Ace derailleurs, so it also looks super nice. Specifications: Color: black Material: aluminum Number of gears: 10-speed Type: long cage Weight: 221 grams Smallest possible sprocket: 11T Largest possible sprocket: 37T Maximum difference: 22T Series: 105 Type number: RD-5701