Slow, low and dirty.
The thing to remember about wheels is (I think) larger diameter increases your ability to roll over rough surfaces while larger width increases your ability to land on soft surfaces. That seems logical but it can be counter intuitive. I have 4" tires from a Timber 1.5 on my Cub and 3" skinny tires on my SE5a. The SE5a can take off from grass fields easier because the tires have less resistance in the grass and the tundra-style tires don't really float over the grass. Scale wise, 2" of 2.5" look more normal unless you're going for the Bush Plane look then the tundras look great. It really depends on what look you're going for and what you take off and land from surface wise. On the losses side, I left my battery pack plugged in all day and it was puffed and showing 1.3 volts per cell. That will teach me to rush through things before work.