I rode 12 front and -6 rear last year. I then switched it to 15 and -9 this year. Rode it for 2 weekends like that and finally realized why I was having constant knee pain and riding like shit. So I switched it to 15 and -3 on the slope. Loved it and rode very, very confident with no knee pain. Decided to go to 15 and -6 yesterday after a full board tune. Not as good. So 15 and -3 it will be. You have to play around with these things.