FYI - December BYO magazine feature article is on New Belgium Brewery and they provide 4 of their recipes, Fat Tire, Abbey Ale, Tripple, and Ranger IPA.
They use the same proprietary yeast for Fat Tire and Ranger. BYO said Wyeast did a special edition release of the yeast and checking the Wyeast site that was in 2008, and not since.
If I could remember the Fat Tire grain bill I'd provide it but the mag is at home and I am not.
But... just checked the New Belgium website and here is their info
ABV - 5.2%
IBU - 18.5
Calories - 155
Hops - Willamette, Goldings, Target
Malts - Pale, C-80, Munich, Victory
OG - 12.6
TG - 2.2