1. Car Modification Gears These gears are suitable for car modifications and offer speeds for an exciting driving experience for children. The 24V motor transmission is a choice for most children's car modifications, bringing joy to your little one's playtime. 2. Easy Installation To ensure an effortless replacement process, our gear motors are equipped with quickchange cable connectors that require no soldering. For the fit, simply compare the model number of your current engine (for 24V motor transmission). Installing or removing transmission housings has never been easier. 3. 555 30,000 RPM Motors The motors of our rideon cars are made of quality plastic plates and engines, ensuring ultimate durability and lasting performance for your child's fun. 4. 555 Motor Transmission Details: This 24V 555 30,000 RPM speed gearbox has a voltage of 24V DC and a speed of 30,000 RPM. The shaft hole diameter is 12 mm (0.47'), while the motor diameter is 35 mm (1.38'), making it suitable for most children's cars on the market.