New Tires
It is time to take the plunge and buy new tires for my 12 year old class A motorhome. They have 29,000 miles on them and look good for the most part,but I know that the age is more important than th...
Forum Discussion
JL7456 wrote:
I finally took the plunge and put six new tires on the MH last week. I got the Cooper Roadmaster RM170. The dealer put 100 psi in the tires and I am feeling like they are overinflated. I feel like I do not have the control I was used to on the old tires. I ran 90psi in my old Michelin's. I would like to hear what others have to say about tire pressure. I am considering letting some air out and giving that a try on the next trip.
If they are the same size and load rating as the old tires, they would require the same inflation pressure as well.
Standard and proper practice is to get actual axle weights for your rig with it loaded (unless you know that information already) and inflate based on the tables the tire manufacturers put out for the load on each axle. Anything else is at best a guess. Typically the tire pressures listed on the placards the manufacturers put on vehicles are based on maximum gross and axle weights and so may be unnecessarily conservative for actual use. They also would only apply to the stated size and load rating of tires.
