FH CASS SUNRACE CSRX1 11-36 BK/CP 11s The SUNRACE CSRX1 cassette delivers reliable shifting across an 11-speed drivetrain with a wide 11-36 tooth range, making it ideal for varied terrain and climbing demands. The black and copper finish resists corrosion while maintaining a clean aesthetic. Built for durability and smooth engagement, this cassette pairs seamlessly with compatible 11-speed chains and derailleurs. A practical upgrade or replacement for riders seeking dependable performance without premium pricing.