I am about to get the T10 19.5 alloy wheels from MKW for my Dually. I have the low-gear-OD G56, so I'd like to get a taller tire than stock. I'm going to the 19.5's because I"m currently over-loading my stock load range E tires, and need the extra safety from the Load Range F or G tires. If I could also get a taller tire and lower my cruise RPMs too, well, that would be a bonus.

My question is, how tall/big is too much? I think the 225s are too short. I'm considering the Hankook 245/70R/19.5 that are 33.4 tall, or maybe even the 265/70R/19.5s (34.5 tall). My question is, since my truck is a dually, I need to make sure that there is enough space between the duals to prevent any touching or rubbing.

What are you guys running on your 19.5 duallys? Also, how many of you have the new MKWs?