No no no. Not trying to be a jerk, but have you measured your stock tires? They might be a 245/75R16 but they aren't 24 inches tall. They are at least 29". The first number is the tires section width in millimeters and the second number is the aspect ratio. What that means is the sidewall is whatever percentage of the section width. So 245mm*.75=183.75mm. So that sidewall is only worth one side, so you need to double that number. So 367.5mm in sidewall height plus the rim size. So the sidewall height is 14.4 inches and that plus the rim's size of 16= ~30.5" tall tire. mm to in conversion multiply millimeters by 0.03937. http://www.miata.net/garage/tirecalc.html
That link should help you calculate what size you want and how much the speedometer will be off. You'd be fine with the 305/70R16. They are 32.8 inches tall.
2002 Explorer Sport 4x4 | 4.0L SOHC V6
Long AAL | Torsion Crank | 32s & 15x8s