Anyone have any experience with Sumatoma tires?  I am looking at 275/70R22.5 tires for my 2001 Beaver Contessa.  I like the load/inflation tables and cost.  The load tables indicate I can run with air pressures in the 90 -100 psi range for the loads I have on wheel locations.  I like the lower pressures since I am able to more easily add air at lower pressures with the coach air system. The higher air pressures take forever to add.
I am about  to replace 2 fronts due to a slit in the slide wall of one of my Yokahama tires.  Clearly a tire failure according to Yokahama dealer but even with only 37000 miles on it they will not warrant any thing because it is over 4 year old.