What tyre pressure is needed for 215/65R16 98S on

The tire has it printed right on the side of the tire. You have a maximum pressure and the lowest presure in PSI If it is a steel belted radial they recommend 28 PSI I however like better fuel milage and longer life so I apply 32 PSI to most my tires. If you have a large load you may want put 35 PSI in the tires. The more air the better the gas mileage but there is a point you will reach that will cause the center of the tire to wear out in the middle and to low it will wear the tires out as well, in cold weather I suggest you run 32 PSI for good handleing and good gas mileage and the longest tire wear. Hope this helps.