Rims and tyres for falcon bf ute
 

Hi guys. I have bought myself a stocko ford falcon bf mkII ute. Will be towing a horse float every now and again. Has those horrible silver rims that belong under hub caps. Bought a set of ford fg sedan mag wheels that are 17inch. Some guy told me I can't put these on my ute because its illegal. They must have light truck tyres?? But I see same utes as mine get around with nice wheels that are bigger?? I thought was fine as long as load rating was adhered to? Help!!