

Note: The built-in drive gear of this rear gearbox has a plastic version and an alloy powder version.
They have different materials and different numbers of teeth, so they cannot be used universally.
This link is Plastic Version Gear,
It can only be used on brushless version cars, and cannot be used on brushed version cars.
because:
1. The material and number of teeth of the plastic gear are more suitable for brushless motors. If metal gears are used to match the brushless motors, the gears are more likely to wear.
2. The material and number of teeth of the alloy powder gear are suitable for brushed 550 motors,
When purchasing, please confirm whether your car has a brushed version or a brushless version. Please purchase it correctly.
They are not universal,