I was thinking the higher max inflation pressure would be safer to run at 50 PSI.
An article I found last night explained that stiffer sidewalls can reduce rolling resistance by reducing the deformation, but the increased weight adds RR. The Pirellis touted as LRR tires are 3 pounds heavier than the Yokos. I'm thinking if I go with the Yokos and inflate them up to 50 PSI, I'll be able to match the RR of the Pirellis. Either way, I'm sure they'll be better than the Douglas XtraTrac IIs I'm running. The aggressive tread pattern can't be good for airflow, plus they're garbage in the rain:
I got them thinking that they might help with snow traction and be a bit grippier than the Goodyear Viva 2s. That, and I needed the cheapest rubbers I could find to get me rolling. After reading some reports about the steel belts separating after 30k miles or less, I think I'm going to replace them. I already put 10k on these.
Now, it's to find a new set. Some people are saying the Yokos got them a 1-2% increase in MPG, and that's with 35 PSI. I wonder what 50 will do? XD