If they are the same as on a 2001 Sport Trac, they are P25570R16...Hope this helps
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Listed on the drivers door post and in your owners manual.
Open the drivers door and on the end of the door or the pillar there should be an information sticker that shows the original size tires
YES, both tires must be the same size on the same axle, be it posi-trac or non posi-trac. Never, ever, mix sizes on any axle.
The 2001 Ford Explorer Sport Trac 4x4 typically comes with tire sizes of 235/75R15. However, depending on the specific model and any modifications, some versions may use 255/70R16 tires. It's always best to check the owner's manual or the tire placard located on the driver's side door jamb for the recommended tire size.
On a 2003 Ford Explorer Sport : Open the drivers door and on the latch pillar you will see an information sticker . One of the things the sticker shows is the original size of tires on the vehicle from the factory
According to the 2005 Ford Explorer Sport Trac Owner Guide : ( 22.5 U.S. gallons / 85.2 litres )
According to my 2001 Sport Trac Manual Fuses 4,5,23 @ 32 are not used for anything.
The 2005 Ford Explorer Sport Trac came from the factory with the Motorcraft BXT-65-650 battery ( that's BCI group size 65 , 650 cold cranking amps )
According to the 2007 Ford Explorer Sport Trac Owner Guide : The fuel tank holds ( 22.5 U.S. gallons / 85.2 liters )
Tires Size - 215/60/R15" Rim Size - 15 inches
The 2002 Ford Explorer Sport Trac owners manual shows : Motorcraft BXT - 65 - 650 ( Ford's " top of the line " battery for your vehicle )