Blaster Man wrote:
You are getting lots of information, much of it incorrect. There is a tire expert on the forum, maybe he'll come on and give some good information...he was a tire dealer for 40 years and gives seminars at many rallies. His advice is to check the weight on the chart, and if using individual wheel weight, add 10% or 10 lbs to the pressure noted in the manual for the heavy side, and use that pressure for all tires on that axle. If not using individual wheel weight, divide the total weight on the axle by two, and add 10% or 10 lbs PSI to the pressure noted in the manual to both sides...same pressure for all tires on that axle. In either case do all these reading prior to driving, either the day prior or morning before starting.
I think you are referring to Tireman9. He was a tire engineer for a major tire manufacturer - as was I. We've compared notes many times, and I consider him quite knowledgeable and practical.
The problem is that the moderators on this site (and others) object to the fact that his website has advertising on it, so he has been banned several times. This is in spite of the fact that he himself doesn't sell or promote anything. He is just trying to reduce the expenses of running a website.
His website is:
RV Tire SafetyAnd what you've described is the way to properly size a tire for any vehicle. I may not agree with the exact numbers, but they are in the ballpark.
Note for those following this thread: Just taking the value from the tire load charts is a guarantee you are going to have overloaded tires - and overloaded tires fail!! - sometimes catastrophically. The weights need to be adjusted for side to side and front to rear load variation - plus, every tire should be operated with a *reserve (unused) load capacity*. I recommend 15%, but that's just me. Also note that there were (are?) a few trailer manufacturers who produced trailers with - ah, let's just say less than that.
