Originally Posted by behi
You can try it, but for me even 1" is very noticeable and makes for a significantly worse ride; ideally, you should be centered on the sidecut.
If your board has 2x4 mounting holes, just move both bindings inwards one hole set from the reference stance.
On some bindings, you can move the mounting disc fore/aft for some fine-tuning...
What he said - basically center the bindings relative to the inserts (i.e., go same number of holes forward/backward from the innermost insert holes until you reach your desired stand width).