The SRAM X3 Rear Derailleur is a high-quality bike component designed for 7 to 8-speed bikes. It is suitable for a range of bike types including hardtail, gravel, electric, and mountain bikes. The set includes a durable rear derailleur featuring a long cage derailleur cage length, ensuring smooth gear changes. With a sleek black colour and bolt-on mounting type, this rear derailleur is a reliable choice for any cyclist looking to upgrade their bike's performance.