Another possible drawback comes to mind, due entirely to the wheels being smaller.
With smaller wheels, the rotational velocity will be greater. Therefore the wear on the axle components may be greater. Also with an increased speed, the wear on the brakes could be greater. Would the fact that the axle weight has now decreased have any effect on wear? I'm only half-guessing, as mechanics is not my forte - I'm an Electronic Engineer.
John
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