This is a steel rear sprocket with 47 teeth, specified for a 520-pitch chain system (part code 42-B01-47) and commonly used in BMW motorcycles. The steel construction ensures durability under load, while the 47T count is tuned to provide a specific final drive ratio—favoring a balance of acceleration and top speed when paired with the correct front sprocket. Precision-machined and built for chain drive systems, it’s intended as a replacement or upgrade for BMW models compatible with 520-pitch chains.
