driver piasty ns bikes rotary ss 10t sp 009 ridehub10T Driver for NS Bikes Rotary SS hubs. Genuine spare part, ideal for single speed drivetrains. The NS Bikes Rotary SS 10T Driver (SP 009) is a high quality drive component designed for NS Rotary SS hubs. Equipped with a 10 tooth sprocket , it provides precise power transfer in single speed drivetrains. Made of durable material, it guarantees durability even under heavy use. It's perfect as a spare part or to upgrade your BMX or dirt bike drivetrain.