Can't find speed rating
I have Ridgway Sport tires on my 2015 Rockwood 8315BSS travel trailer. I can't find a speed rating for these tires anywhere on the sidewall. They are ST225/75/R15 load range c. The only other thing I can find is H178 after the size, but I don't know what that means. I'm assuming they are rated at 65 mph, but would like to know for sure. I can't find anything about these tires anywhere online. Does anyone have these tires or know anything about them? Do some tires not have the speed rating on the sidewall? They are load range C, and the air pressure is 50 psi. And they are made in China.
We are planning a trip to Montana this summer and I want to make sure I have all of my ducks in a row, so I was trying to find some reviews on these tires.
Also, I read an article by Bob Livingston a few years back about the pressure. He said that the pressure on the sidewall is the "minimum amount of pressure required to carry the maximum load", and that you should run 5 or 10 lbs above what's stated on the sidewall. Has anyone else heard this, and what do you do? I typically run at or just slightly above the sidewall number. But most of my trips are within 100 miles of home, but this will be the first trip of this magnitude, so i'm trying to re-educate myself.
We are planning a trip to Montana this summer and I want to make sure I have all of my ducks in a row, so I was trying to find some reviews on these tires.
Also, I read an article by Bob Livingston a few years back about the pressure. He said that the pressure on the sidewall is the "minimum amount of pressure required to carry the maximum load", and that you should run 5 or 10 lbs above what's stated on the sidewall. Has anyone else heard this, and what do you do? I typically run at or just slightly above the sidewall number. But most of my trips are within 100 miles of home, but this will be the first trip of this magnitude, so i'm trying to re-educate myself.
