205/70-14 is appropriate for a 5" rim, while not optimum on a 4 1/2" rim, 1/4" per side, side wall deflection is not going to make any noticeable difference in ware or handling or ride quality at all
Actually that's not quite accurate. The 205 tire is matched to fit a 5-7 inch wide wheel. 6 inch being the optimal. Therefore a 4-1/2 inch wheel is actually 1-1/2 smaller than optimal. Everything has it's limits which is why the manufacturer says 5-7 inch rim. Wear pattern is said to change with too wide or too narrow a wheel. Significantly?? I don't know. It's up to the OP to make an informed decision.
