Yup, another tire question? - same old... same old..

DutchmenSport wrote:
Trailer is 35 feet long and weight is suppose to be around 8000 pounds empty.

You are an experienced Rver and often provide good, sound advice to other posters. And that is what surprises me about your statement quoted above. Do yourself a favor and actually weigh your trailer before buying tires. You may find you have been loading your tires to a maximum rating and your luck with tire success is about to change.