I'm just over 21K miles on my sedona (KUMHO) tires and they are down to the bars already indicating need for replacement. The tire size calls for P215
70 R15 97H. I cannot find that tire around here in a "H" speed rating. How critical is it to put an H rated tire on the Sedona minivan or is this just a ploy to get you to use OEM tires? I really do not want to go with the KUMHOS again and have to replace tires again so soon.Thanks for any help.