What year Trac? 1st gen, yes, direct fit. 15" wheels will not fit over the Trac brakes. I know this for a fact. I have a 2000 Explorer with 15" Wheels and a 2002 Trac with 16" wheels.
My brother is running a 1999 Explorer with 2002 Trac wheels, perfect fit. The Explorer 15" wheels will not fit over the brakes on my Trac.
Tom