Here is a comparison between the 2.4" and 2" wheels and the relative size car bodies.
The larger car isn't too big and the size does allow for more 'realistic' detail, for a toy that is.
The wheels are cut from red maple and the cars are finished with Tung Oil.
PS: for those that downloaded the 2" wheel with options, once cut, the option detail is too small to be of any appreciable value. Future car/truck designs may include Model A cars too. The wheel base is 3-1/2" longer but the tires and wheels are the same as the model T 21" wheel ( however, some years and Model A's did use a 19" wheel).
The following PDF has a table added based on several wheel base dimensions in photos printed on 8-1/2 x 11 paper.