For a 2001 Ford Expedition :
Open the drivers door , and on the latch pillar will be an information sticker
It will show the original size of tires on the vehicle from the factory
The 2001 Ford Expedition has a V8 engine.
The 2001 Ford Expedition has a 4.6 L base engine size.
6x8
225-60-16 radial tires
My 4x4 Expedition has 265/70/17......if you have 16" wheels it should be 255/70/16
On your 1997 Ford Expedition : I BELIEVE that if you open the drivers door you will see the Safety Compliance Information Label ( information sticker ) either on the end of the door or on the latch pillar ( it will show what size of tires were on the vehicle from the factory )
Open the drivers door and I believe there is a sticker on the end of the door or on the pillar which shows the original size tires that were installed on the vehicle at the factory
255 70 16 is the factory size it came with.
205/65/16
P205/70r15 95s
NO
Original Equipment Size: 205/70-15