Wheel and tire questions

[Terminator]

Can someone tell me the proper backspace and offset for a 1999 Explorer sport 4x4? I would like to use these wheels:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=EXP-1079-5865&N=700+0&autoview=sku

And these tires:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SSW-RXS-01R&N=700+0&autoview=sku

Any know for sure that the wheels are the right bs/offset?

 

[FROADER]

They will stick out a little more than your stock wheels, but those will fit fine.

I believe stock backspacing is 4.5"