Upgrade your bicycle with this high-quality 9T driver cog, designed for single speed use. The black color adds a sleek look to your ride, and the SRAM XD freehub/driver type ensures compatibility with a wide range of bikes. With 9 speeds to choose from, you'll be able to tackle any terrain with ease. This cog is perfect for those looking to improve their cycling experience, whether you're a beginner or seasoned rider. Its durable design and reliable performance make it a great investment for any cyclist. Add it to your collection of bicycle components and parts today.