You know the life expectancy for those ST tires is only 3-5 years at best. Personally I don’t think you would get very far with those pictured before they started to fail.
When you get some new ones, the increase from LRC to LRD was a good recommendation. Just ask the tire installer to check your rims to see if they will take the air pressure increase from 50 psi to 65 psi. Remember, ST tires are designed to operate very successfully on full sidewall pressure which is also highly recommended by the vast majority of their manufacturers.
FastEagle