[A/S] upping the load rating is not necessarily the best?? (was :tires)

["Thomas Dickieson" <lleather@xxxxxxxx>]

I could theoretically agree that upping the load rating of tires 
could cause a longer trailer to experience more frame stress while 
moving down the highway, BUT we all must remember that the original 
tires on our 1970s Airstreams were bias ply, which rode a lot rougher 
than a D or E rating radial ever could (I would think).  I am not 
saying anyone is incorrect on this, just throwing in another 
thought.  Anyone think up a formula to for instance compare the 
resilience of an E rated ST225 radial to a bias ply 700 tire?

Tom