arduino smart Car Robot Plastic Tire Wheel with DC 3-6v Gear Motor Specification: Motor: Voltage DC 3V DC 5V DC 6V Current 100 MA 100MA 120MA Reduction rate 48:1 RPM (With tire) 100 190 240 Tire Diameter 66mm Car Speed(M/minute) 20 39 48 Motor Weight (g) 50 Motor Size 70mm*22mm*18mm Noise <65dB Tire Parameter Center hole: 5.3MM x 3.66MM Wheel size: 65x26mm Package Included: 1xsmart Car Robot Plastic Tire Wheel 1x DC Gear Motor