R10 front derailleurs work with 10-speed Shimano-compatible road shifters. Designed to work with a variety of chainring combinations, these workhorse components will get you rolling again. Features: Cold-forged aluminum body Includes adapter for 34.9mm and 31.8mm seat tubes Specifications: Weight: 115g Capacity: 16 Top Gear: 50-56T Mount Type: Clamp (31.8 - 34.9mm) Speed: 10 *Note: unit is all silver color, no black as shown in picture.