Another tire post

tkd01 wrote:
(quote Cummins12V98) Know your actual weights and inflate per Weight/Inflation chart plus 5psi. Most likely 85-90 psi will do the trick. 110 will most likely give a rough ride.
This is what I did. I had a blowout and cost about $2,500.00. Luckily insurance paid for it. I went to a pro trailer company that deals mainly with construction trailers, and those people are very particular what goes on their trailers to haul their heavy expensive equipment around. Anyway, they advised me to go with a G rated 14 ply tire that they have yet to hear anyone have a blowout with. Punctures, of course is another story. So, I agreed even though my CC Silverback is only rated for max 14K pounds and had E rated tires. Wheels are rated for 3052 pounds with 6K axles. I was also concerned about the PSI requirements, and hey told me to worry more about the weight rating of the wheel and that will dictate the PSI you should be using for any tire. Even though the tire is rated for 110 PSI max we are using between 85 and 90 for the max load that I could put on my trailer anyway. If I seen any abnormal tire wear I could adjust the tire pressure accordingly. Just remember your wheel is rated for certain pounds not so much PSI. The max weight rating dictates the PSI you need. I guess that makes sense. Also, I was kind of worried about the size of the G rated tires since I had to go 85 instead of 80. Luckily I had at least the 1 inch of clearance between the tires that is recommended. Close though, the tread pattern on these are really different from the usual tires I see, but they do seen to ride very good in the last 1K miles I put on them so far. Very thick and hard to put on tires. Hope I don't have anymore blow outs. Can't remember the name of these but they are radial ST tires. I believe they are almost all made in China.

When using a replacement tire with a higher load capacity than the OE tires provided, the industry standard is to use an inflation pressure in the replacement tire that will cause it to equal or exceed the load capacity the OE tire provided. Usually the reason for the stronger tire is for it to provide more load capacity reserves. So, increased inflation pressure will do that with the higher rated tire.

The load capacity of a tire is provided by the inflation pressure, so, insure you are inflating them to a value that exceeds what they have to carry.

Just a note: Sometimes those that provide commercial tires use the wrong set of instructions about inflation. The Federal Motor Carrier Administration’s standards are not interchangeable with the Federal Motor Vehicle Safety Standards which are the standards for all RV trailers.