Snowboard flex rating question
I have several snowboards and I'm curious about flex ratings from various manufactures.
I have a NS '13 Cobra, '12 Proto and '11 SL. If memory serves, all were rated as flex rating of 5. They do not feel like they have the same flex. The proto is way softer. I have a '12 Billy Goat that is rated as a 7 and it feels softer than my Cobra. I can butter the Goat easily...the Cobra is more difficult to butter.
Can anyone explain to me how they measure the flex rating?