Thats about the weight I carried on my 03 F350 4x4 diesel crew cab SRW with my Lance 1055. I upped to 19.5s and Toyo tires. major improvement in stability but I hated the tires. too much wander and they grabbed at every ridge in the road. I prefer the Cooper roadmasters that I now have. As far as Rickson Wheels go. Those that have love love them. I got the run around from Rickson for 9 months on false ship dates, and excuses. I will never do business with them again. I canceled my order and got a set of Vision Heavy Haulers just days before a big trip. The Visions have been on my rig for 4 years now no regrets. 19.5s in a 245/70R19.5 are the way to go on an SRW
I still have the SRW and I have a newer Dually