Speedometer Hub Drive Gear For Z50 Monkey Bike This drive gear is designed to fit Z50 monkey bike models and connects to the speedometer hub to accurate speed readings.It installs directly onto the existing hub assembly and interfaces with the speedometer to transmit rotational movement.The gear is constructed to match specifications for performance and consistent.It serves as a replacement part for worn or damaged drive gears in the speedometer system.Important: This is an independent aftermarket part.Brand/model references serve only to show compatibility.