The 1996 Toyota T100 tire size depends on trim: the Base, 2D Pickup Extra Cab, 4WD, Automatic takes P235/75R15 105S; the Base, 2D Pickup Extra Cab, 4WD, Standard takes P235/75R15 105S; the Base, 2D Pickup Extra Cab, RWD, Automatic takes P215/75R15 100S; the Base, 2D Pickup Extra Cab, RWD, Standard takes P215/75R15 100S; the Base, 2D Pickup, Automatic takes P215/75R15 100S; the Base, 2D Pickup, Standard takes P215/75R15 100S; the SR5, 4WD, Automatic takes P235/75R15 105S; the SR5, 4WD, Standard takes P235/75R15 105S; the SR5, RWD, Automatic takes P215/75R15 100S; the SR5, RWD, Standard takes P215/75R15 100S, per the factory service manual.
Factory-Spec Tire Size
Varies by trim
Base, 2D Pickup Extra Cab, 4WD, Automatic: P235/75R15 105S
Base, 2D Pickup Extra Cab, 4WD, Standard: P235/75R15 105S
Base, 2D Pickup Extra Cab, RWD, Automatic: P215/75R15 100S
Base, 2D Pickup Extra Cab, RWD, Standard: P215/75R15 100S