Great_Danes wrote:
FastEagle wrote:
According to the specs I found for your trailer you have 7000# axles. Because Keystone has used OE tires rated at 3520# @ 80 psi (A very poor selection for a toy hauler - In my opinion) you have a wide selection of suitable replacement tires to choose from and it looks like you have been doing a lot of good homework.
As you can see in this reference there are a lot of options just in the 16” LRG. There are equally as many 17.5” choices, many with very reasonable prices for tire/rim combinations.
The bottom line I’m getting to is your recommended tire pressure for whatever upgrade you decide to use. Remember, your manufacturer has set your minimum tire load capacity at 3520# with the OE tires. None of the 16” LRG tires will provide that much load capacity at 80 psi. And the 17.5” tires will also need more than 80 psi. It’s been recommended numerous times in this thread to use at least 15% in load capacity reserves above the vehicles GAWR (7000# ea).
2010 specs
FastEagle
Actually the tires that Keystone used for my rig are Carlisle's rated at 3420lb and therefore adjusted the placard numbers for GAWR to 6840lbs. I determined they were 7k axles through some homework and in order to achieve 15% reserve capacity I need a tire rated to at least 4120lbs, so I have decided to go with the 17.5" option with a load rating of 4805lbs... Lots of reserve capacity!
You know, Keystone isn’t the only ones doing that. I’ve been to a number of RV showings this spring and took a lot of pictures. The one below is similar to what is going on with a lot of manufacturers and their tire selection for the 7000# axles. They are lowering their true value on the certification label - perfectly legal - so they can put on very marginal tires. In the end they had to reduce the cargo capacity to do it.
specs photoFastEagle
p.s. Very good final selection for your upgrade. Toy haulers really need some nice reserves. It would be counterproductive to have all that room and not use it.
