Tire Inflation Questions
(I did a search about "tires" on this forum and there were 270 pages that came up so I thought it best to just ask my question directly) I just read a post on this forum from someone who had a roug...
Forum Discussion
You should inflate your tire to the recomended pressure for your loaded weight, this is best done with 4 corner weighing, though if that is not available many people use axle weights from CAT scales at truck stops (the charge to get a CAT scale weight is about $10), also many agricultural fertilizer, landscaping, etc. places will let you weigh for free, or nearly free if for non-commercial use.
Here is the Michelin inflation chart
http://www.rvtirepressure.com/assets/images/extrapages/michelin_rv_load_inflation.pdf
http://www.rvtirepressure.com/assets/images/extrapages/michelin_rv_load_inflation.pdf
p.s. I disagree with the above advice, often the maximum sidewall pressure will result in a tire wearing abnormally as it is much higher not only than the actual pressure needed for the load, but also often well above the GAWR (Gross Axle Weight Rating) for the RV. For example my coach has a 6,000 pound GAWR for the front axle, and loaded down my coach is close to the GAWR therefore based on the chart I linked above I keep them at 80 psi which is 5 psi (safety margin)over the minimum for a 6,000 pound load for my size tires. If I were to run max pressure of 95 psi, this would give me nearly 7,300 pounds of carrying capacity, which is well over my 6,000 pound axle rating, but it would also cause a harsh ride, and the middle of the tires would wear out faster than the edges.
Here is the Michelin inflation chart
http://www.rvtirepressure.com/assets/images/extrapages/michelin_rv_load_inflation.pdf
http://www.rvtirepressure.com/assets/images/extrapages/michelin_rv_load_inflation.pdf
p.s. I disagree with the above advice, often the maximum sidewall pressure will result in a tire wearing abnormally as it is much higher not only than the actual pressure needed for the load, but also often well above the GAWR (Gross Axle Weight Rating) for the RV. For example my coach has a 6,000 pound GAWR for the front axle, and loaded down my coach is close to the GAWR therefore based on the chart I linked above I keep them at 80 psi which is 5 psi (safety margin)over the minimum for a 6,000 pound load for my size tires. If I were to run max pressure of 95 psi, this would give me nearly 7,300 pounds of carrying capacity, which is well over my 6,000 pound axle rating, but it would also cause a harsh ride, and the middle of the tires would wear out faster than the edges.
