don't go with the single crown shiver!!! it's smoothe but man it's flexier than a wet noodle... that is the main reason when i bought my giant ac i didn't go with the ac1.....i got the ac2 because the single crown...was so flexy!!! I mean it felt like you were trying to turn a 2x4 that was soaked in water! I do like marzocchi stuff...but not that fork!!!