Fox Racing Shox says all its pro riders have been on the air-spring system since late 2011. Production versions arrive this summer.
Vorsprung Secus Fork Air Spring Upgrade Kit - Fox & Rockshox Forks – Vorsprung Suspension
First Ride: Air-Sprung Fox 40 Float RC2 Fork – The Truth is Revealed - Pinkbike
Fox 40 Float FIT RC2 Review - REVIEWS - Downhillnews
Review: Fox 36 Elite Fork - BikeMag
BikeRadar Battle: RockShox Pike RCT3 Solo Air vs Fox 36 Float RC2 - BikeRadar
Fox 40 Float FIT RC2 fork and DHX RC4 rear shock – first look - BikeRadar
Review: Fox 40 Float RC2 Downhill Fork - Singletracks Mountain Bike News
New suspension tech from RockShox and Fox - BikeRadar
Fox Racing 40 RC2 - Pinkbike
Fox 40 Float FIT RC2 fork and DHX RC4 rear shock – first look - BikeRadar