Blowouts on front passenger side tire
We have just had our second blowout on the front passenger side tire on our Class A Beaver Marquis 2005. In weighing the coach, we are pretty heavy for the weight of the tires the manufacturer put on...
Forum Discussion
Ivylog wrote:
By putting 315.s on the front I was able to reduce my psi from 115 to 100. On the rear you do not need 295.s so I went with the less expensive 11R22.5 and I had to increase my pressure from 85 to 95 because of the lower load carrying of the 11R. Do not worry about putting a 315 on a 8.25" rim as it only reduces it's load carrying by a small amount.
The derate for 8.25" wheels is greater than the difference in 295s and 315s. I put 315s on my coach to gain a little headroom but I do use the modified inflation table in this guide.
http://www.michelinrvtires.com/assets/pdf/RVTiresBrochure.pdf
At 14,000 pounds on the steer axle, the inflation pressure difference is just about 2.5 psi. If you have 9" wheels the spread goes up to 7.5-10 psi.
