Originally Posted by 4sevens.com
Going squared is usually for the ability to rotate to even out wear.
Rears usually fit bigger wheels/rubber by design - plus it doesn't need to turn which requires more space.
The fronts are pretty much maxed out at 275 - any bigger will cause rubbing. You can't stick a 305 up front. So the only way to go square would be to downsize the rear to 275.
My walk around video just finished uploading!
I wouldn't sacrifice having a 305 either. Good choice.