Gas Dirt Bikes Mini Dirt Bike 50CC 2-Stroke Gas Bike Motocross Moto for Kids
The new model is with 40x20 square tube, the old model is 30x15 square tube. The rear fork axle has a 14x10.2 seamless tube spacer, which reduces the gap between the fork screws and the tube spacer, and can greatly reduce the left/right swing and the probability of dropping the chain.