Originally Posted by Taranwanderer
I'm in the same boat as you, Mud...the XLR came with Westlake 235/80R16, load range E tires. I'm thinking of replacing them but I'd like to know if what I currently have is any good. They have a max load stamped into the sidewall of 3520#, which is pretty good for the "E" tires I've been shopping for. Anyone else have any first-hand experience with them?
3520# interesting. Since load capacity is controlled by the inflation and tire type (LT, P or ST) I have to wonder why Westlake thinks their tires can carry 100# more than the competition
. Could it be that they were asked to provide a ST235/80R16 LR-E to be applied to a 7,000 axle?
Regulations require that tires be rated to carry the specified load. The mfg may have decided they did not want to de-rate the RV to reflect a more reasonable load capacity or to spend the money needed to use larger tires with a normal load capacity.
This would much like marking 1000# chain for 1050# and counting on most users to only loading the chain to less than 1000#.
IMO this is a strike against the RV MFG for playing games with established engineering principles and a strike against the tire mfg for playing along.
This is not the first time I have seen a tire company and RV mfg stack the deck. Of course if you go this route you would be forced to always find tires with 3520# rating. Good Luck with that.