* 4-lug: 4x4.5" (4 lug, 4.5 inches between the center of each lug)
* 5-lug: 5x4.75" (5 lug, 4.75 inches between the center of each lug)
To find out definitively:
1. Look at your existing wheel: The bolt pattern is usually stamped on the back of the wheel itself.
2. Check your owner's manual: If you still have it, this should specify the bolt pattern.
3. Measure the wheel: Carefully measure the distance between the center of two adjacent lug nuts. Then multiply this number by the number of lugs to get the diameter of the bolt circle.
Without physically checking your S-10, it's impossible to say for certain.