Dan, seeing the cars from 48", most of the stack cars should have 125 ton trucks and 38" wheels. Same is true with some coal cars. The aluminum coal cars are almost all on 125 ton trucks and are right against the ARR max weights loaded. Being a "tankcar guy", molten sulfur tanks often have 125 ton trucks on them too. I've got photos in the yard to back me up.(Loaded sulfur tankcars radiate quite a bit of heat when you're 12" away!"