Hi, Thanks for asking. I've found a few 13" tires out there. But I'm not sure what the differences are. Like I posted, I've got 175 80/r13s on there now, but Firestone and other online places only have 185 70/r13s. I don't understand the difference, but they say they'll fit. My only issue is my one rim that seems to bee too dinged up to hold air forever. It has a slow leak. I'm sure the old tires don't help with that, but if I could find some good oem rims that took that hub caps that I have, I'd buy 'em. B