It's engineered for use with a 1x10 drivetrain setup, this rear derailleur features a clutch chain stabiliser, is compatible with a max cassette sprocket size of 46-48-tooth and attaches to your frame via a standard mount. Plus, it has a large pulley with tall teeth for greater chain retention, smoother gear shifting and dependable performance in all riding conditions. Lightweight, Reliable and Efficient Gear Shifting Performance With a race-worthy weight and the right gearing for any situation, microSHIFT’s top-of-the-line Advent X rear derailleur delivers high-end performance without high-end headaches. By using a 10-speed chain and wide-range 11-48t cassette with predictable, evenly spaced gear steps, Advent X allows you to find the right gear even in challenging conditions. This rear derailleur also features microSHIFT’s proprietary ratchet-and-pawl clutch, larger pulleys with taller teeth for better chain retention, and metric adjustment hardware, giving you everything you want and nothing you don’t. Key Features: Larger pulley and taller teeth for better chain security and higher ride height Metric adjustment hardware Ratchet-and-pawl clutch provides chain security and can be turned on and off with a switch Compatible with standard 10-speed chains Compatible with 11-48T 10-speed cassettes Compatible with Advent X shifters only