PST is a sponsor here on FABO, shocks and t-bars, Members get a 10% discount I believe. Maybe under engineered was the wrong word, they are not up to the newer tires, radial not bias ply.
No worries about why they should be replaced, just thinking that if I'm going to do this, I'd rather only do it once, so if I have to break them out, might as well replace them when they're out