## Rear Sprocket 520 42 Teeth JT Sprockets JTR1857 The JT Sprockets JTR1857 rear sprocket is a high-quality component for motorcycles and scooters, guaranteeing optimal power transmission. Made of durable C49 - High Carbon Steel, it ensures long life and resistance to wear, even under demanding operating conditions. ### Precision and Performance The JTR1857 sprocket is characterized by precise manufacturing of 42 teeth, which translates into smooth and efficient power transfer. Compatible with 520 size chains, it works perfectly with other drivetrain components, ensuring a smooth and dynamic ride. ### Fit and Installation Thanks to precise parameters, the JTR1857 sprocket is easy to install. The center hole diameter of 125mm, the bolt circle diameter of 145mm, and the mounting bolt hole diameter of 10.5mm guarantee compatibility with many motorcycle and scooter models. ### JT Sprockets Quality JT Sprockets is a renowned manufacturer of motorcycle parts, known for the high quality and reliability of its products. The JTR1857 sprocket is further proof of the attention to detail and precision workmanship that characterizes the JT Sprockets brand. By choosing this product, you are investing in proven quality and long-lasting performance for your motorcycle or scooter.