Getting a facelift at 32 years old may sound odd, but that’s exactly what New Belgium Brewing’s flagship beer needs, according to the Fort Collins-born brewing giant. Fat Tire — a mainstay for the brewery since it was first concocted 32 years ago in the basement of New Belgium founders Kim Jordan and Jeff Lebesch — has officially been reimagined. Now known as Fat Tire Ale, it has a new recipe, packaging and title: America’s first certified carbon-neutral beer. The overhaul has been in the works for about a year. While New Belgium officially announced the changes Tuesday, the new beer has already quietly started rolling out, and customers should start seeing it on liquor and grocery store shelves.