they say 6pr on them but they are pretty soft.looked them up,everything points towards 6ply but like i said they are soft when air goes down on them................had a 4.5 tremer,knocked me outta bed at 4.00 am woww in flatlanderville illinois

 

Yeah, I know what you mean by the rating system they use on ATV tires. Some of them don't seem quite as strong as they should be. On the quake front there are fault zones all through the country. If I remember right, one of them let loose and the Mississippi River ended up in a new channel back in the 1800s. California can keep the earthquakes. I'll take the ice and snow any day of the week.