15x7.5" Konigs, Will they fit 01 Sport Trac

My father's got an 01 Sport Trac with the 15x7" factory wheels on it right now. 2 of the wheels have rotted so we have decided just to get some new wheels all around. Looking at the Konig Rugged Road wheels http://shopping.netsuite.com/s.nl/c.275188/it.A/id.7146/.f. The wheels are 15x7.5" 5x114.3 ET20. Will these fit on the truck? The wheel supplier can't guarantee they will fit.

 

[gear_grinder]

probly would be a good idea if you got some more specs then just the width and diameter. like backspacing would be nice and the centerbore of the rim.

if you get those mesurements, then you can compair it to a stocker to see if it'll fit