תיאור
540-M4 Mod Rotor 13.0 x 5.0 x 25.3
Fine-tune your Reedy Sonic 540-M4 motor for varying track conditions and applications with a powerful assortment of optional rotors. Each rotor is laser etched with its specification and part number for easy identification and technical inspection.
https://img2.associatedelectrics.com/pdf/cars_and_trucks/shared/Sonic-540-M4-Rotor-Application-Chart.pdf