What chassis? Are your rear end tubes the standard lengths?
All the standard stuff on a Bicknell is:
LF - 10x4
RF - 12x5
LR - 13x3
RR - 14x3
Just running the standard stuff is best to start with. Switching wheel offsets, you should also know what it does on the scales. For instance, space the LR wheel out 2" and you'll lose 30-40 lbs of wedge.