Question: what is the difference between load range d and c?
Answer: The difference between an load range C and load range D tire in the same size is the capacity and psi rating. ... The D rated tire has a higher capacity. For a ST175/80D13 like # AM1ST77, the capacity is 1,610 pounds at 65 psi. For a C load range in the same size, like # AM1ST76 , the capacity is 1,360 pounds at 50 psi.