Post below about a six year life on a tire reminded me. I've got a Kiefer livestock trailer with the larger 8k axles. I'm not sure of the tire size but it is quite a bit bigger than most livestock trailers. The trailer is about 30 years old and still has original tires. I pull it once or twice a year now and it sits outside. I do not remember ever having a flat on this trailer, think it might have the original air in it also. Tires are going to outlast the floor!