I have the same board, 158cm. Standard width is fine for normal conditions. In a foot of wet pow, I had to set back all the way, and it worked beautifully. So depending on your conditions I'd recommend similar. I charge pretty hard and never really wished on groomers I had more of a setback.
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Mike
2010 Arbor Element
2010 Rome Targa
2011 NS Evo
2011 Rome 390 Boss
2009 Salomon F22
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