I currently have 315's all around and I'm due for a new set of drivers. I was wondering if anyone have gone to 12R22.5 for the drive axle. I'm going to keep the 315/2.5 on the tag and steer The operators manual said the tires size in preference order is 315, 12.5, 12R and 11R. But again the one aluminum and one steel wheels with 315's on the drivers makes for some very close rubber. that is why I was thinking about 12R's.
GregM