Blowouts on front passenger side tire

Ok, so we have found out that although Beaver put 295's on the front tires, the weight on the front is over 16,000 lbs. we started with 125 lbs. in each as we began driving that day, and it was probably in the 90's temperature wise that day. The manager of the service center, who has been in the business many years, rendered his opinion that we really needed 315's to accommodate the weight, though again, the manufacturer built it this way and we never travel with a full tank of water. The tires were on for four years but had been manufactured in 2008 so we were pushing up against the five year mark. And yes, they were Goodyears and we now have run into other Monaco product owners who had a similar experience with Goodyears and a blowout.

Good sam roadside service (Platinum) initially asked us if we were in a safe place and I said no, not really-we were in the path of an exit ramp with two lanes of traffic whizzing by at about 65 mph so they said could not send anyone to help as it would not be safe for them. I then said, well. we are broken down, how do I get help? They said call 911 and tell the police what happened and then if police say it is safe, we will come. ,we had them talk to police officer and he then arranged for a local tow service we knew of that we then had to pay out of pocket over $1000 for a three mile tow. Good Sam said we would have to submit a claim for reimbursement.