The Kheo Air-X replaces the Air-S, while the F-X steps into the shoes of the Flyer. New aluminium multiposition channel trucks have been slapped on the F-X and the Air-X has been refitted with 12mm skate trucks. This is an increase in axle size allowing Kheo to expand the riders' weight limits. The boards are stronger and more resistant to sideways force. That's not all that went on in the upgrades though; tyres, foot straps and the decks themselves all got a good seeing to.