I think its pretty amazing how a bike with a single crown fork and a rear air shock can withstand Redbull Rampage. It goes to show that bikes have evolved hugely in the past few years.
their probably more flexible than a downhill bike anyway, single crown means the forks can flex out more but with a dual crown their more held to the head tube.
norcofreeridderr is right, because most of the riders that go on RedBull Rampage ride dual crown forks, so you must have guts to go there with a single crown..btw this is a nice looking bike!