Post by
DanielC »
https://forums.nicoclub.com/danielc-u110482.html
Wed Dec 31, 1969 5:00 pm
I have been watching this thread, because I am needing to get new tires for my PL-521. The wheels are 4 inches inside the beads, and 14 inches in diameter. same sized wheels as a 320, I think. After talking to a couple of different tire stores, one store recommended not using a 185 tire on a four inch wheel, and here is the odd thing. they had 185 tires to sell to me, but they did not have a narrower tire that would fit. In other words, the guy lost a sale, in order to give me good advise.
A 185 tire will go on a 4 inch wide Datsun wheel. The sidewalls will be pulled in more than the tire is designed for, and the tread will be crowned too much. the tire will wear out in the center before the edges of the tread will. You can even out the tire wear by running a lower tire pressure, but that will reduce the gas mileage.