I would install the OEM size or a set of 245/70-15. These would be close to the same diameter and should not effect the speedometer or gearing at all.
For the 2005 Ford Explorer XLT , the Michelin website shows : P 245 / 65 / R17 as an alternate option ( if you want to change from 16 inch to 17 inch rims )
6x8.
P245/65r17 105s
what are the speakers sizes for a 2001 ford explorer eddie bauer
On the 2003 Ford Explorer the wiper blade sizes vary depending on the trim-level of the Explorer. See sources and related links below to lookup wiper blade sizes for exact make, model, year and trim.
235/75/15
1995 Broncos were available with two different stock tire sizes - 235x75x15 and 265x75x15. Either size is correct, but many other sizes and profiles will also fit.
BCI group size ( 65 )
Up until the 1995 Ford Explorer the only engine was the 4.0 L - OHV - V6
Everything I can find indicates that all four are 5x7 inch speakers.
For a 2003 Ford Explorer : There were two engine sizes offered from the factory ( the 4.0 liter SOHC , V6 engine , and the 4.6 liter SOHC , V8 engine )
4x6 inches. Many aftermarket speaker manufacturers make a direct replacement in this size.