This post was started by a person that has been a member of this forum for 20 years. I’m sure he knew what he was doing when he asked such a broad question (S).
On the flip, what are the best LT or P tires?
The China ST tire industry has substantially improved the quality of their product over the last few years. Some improvements were from advanced technology and others were just in keeping in step with consumer demands.
Michelin and Bridgestone put some pressure on with their steel cased 16” tires and GY built the G614 steel cased LT and coined it RST. The GY was the only one to get substantial OEM support. I’m sure the cost of the others prevented the trailer manufacturers from using them as OEM. It could have also been the fact they are retreadable with tall treads making them damageable from high sheer forces all RV trailers encounter.
Anyway, the China ST tire manufacturers took note and saturated the market with 16” steel cased ST tires. In the past year there have been at least two brands introduced with 15” steel cased ST tires. I’ve even seen a 12” ST radial.
RIVA has mandated a recommended 10% load capacity reserve for all Original Equipment tires. That’s been in effect for nearly three years. The US government got in the act and demanded all imported ST tires must have speed ratings displayed on their sidewalls. TRA supports increases to 81 MPH.
The average consumer seeking replacement tires have no real reason to cross over to something different than what has been recommended by the vehicle manufacturer. High mileage consumers usually have large trailers and the new steel cased ST tires will last just as long as other designs. Once you get into the 17.5” market the door opens wide for low platform trailer tires by numerous brand manufacturers. However, that market has lots of “J” speed rated tires @ 62 MPH