Common bolt patterns for 1985 S10s include 5x4.75" (five lug, 4.75-inch bolt circle diameter) and sometimes 6x5.5" (six lug on some heavy-duty models). However, you cannot rely on the year alone.
To find your bolt pattern:
* Measure your existing wheels: Measure the distance between two lugs directly across from each other (opposite lugs). This will give you the diameter of the bolt circle.
* Check the hub: If you can remove a wheel, the bolt pattern is usually stamped or cast into the hub itself.
Once you have the measurement, you'll know your vehicle's bolt pattern. Only then can you safely purchase replacement wheels.
