FSA 50t Pro Road 10 speed 110 mm Black chainring (use w/34t inner) Teeth: 34, Chain Compatibility: Campagnolo 10/Shim/SRAM 10/9-speed, Chainring BCD: 110, Ring Position: Inner, Material: 7075-76, Bolt Pattern: 5-bolt, Color: Black, Manufacturer Number: 370-0234L Pro Road Series: CNC Machine AL7075/T6; Laser-etched logos; Some are designed to work in specific tooth combinations; See specific compatibility at individual part number bullet point; S 10 is compatible with Shimano, SRAM and Campagnolo Ultra Narrow 10-speed; S9/C10 is compatible with Shimano 9 speed and Campagnolo C10 10-speed; N10 is compatible with Shimano, SRAM and Campagnolo Ultra Narrow 9 and 10-speed