This model measures 4.5 inches from the edge of the back tires to the edge of the front tires. The width is 2.5 inches from tire to tire and 2.5 inches high from ground to the top of the handle bars.
At 4.5 inches for the model and 96 inches for the real vehicle, the scale works out to be ABOUT 1/21 Scale.
The model has some suspension movement on the front and back wheels.
The wheels are made of plastic and can roll freely.
Keep in mind that these are really not toys and will not last long if played with regularly.