What's the deal on using ST instead of LT tires?
-- Fed Gov forced the RV industry into using ST tires for weight ratings. Use to use GY G614 LT, but had to go w/ ST's. We've had no problems w/ the Westlake(?) tires we've been using past 3-4 years. If owners want to switch out to LT's they can, but we can't put LT's on at factory. ST tires have a higher weight rating than LT's.
This was the question I asked the CC rep at The Syracuse RV show and his reply. I looked at the side wall of the ST 235/80R16 "E" and it's rated for 3520 lbs @ 80 psi. Did a quick search on Cooper Tires web site at LT 235/85R16 and they came in at 3040 lbs at 80 psi. I forgot, but think all LT 16" are 3040 lbs. Our 5er is still in storage, but I think it's tires are LT245/85R16 and coach has a GVW of 13,800. Apparently no much how one argues, the factory won't put LT tires on. Not sure if dealer would make a deal with a customer on switching them upon purchase of RV.